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Phase purifying and dielectric improvement in Zn2SiO4 ceramics via simply controlling the particle size of SiO2 Int. J. Appl. Ceram. Technol. (IF 2.1) Pub Date : 2024-03-14 Zhuo Xing, Julong Song, Hong Pan
The zinc orthosilicate, Zn2SiO4 ceramics, exhibit great potential as microwave dielectric materials due to their low dielectric constant and ultrahigh quality factor. The solid‐state synthesis of Zn2SiO4 ceramics often results in the presence of a secondary phase of ZnO, however, leading to significantly lower Q×f values. Cold‐isostatic‐pressing (CIP) and nonstoichiometry have been proven effective
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Convenient preparation of calcium hexaluminate based castables with low thermal conductivity and sufficient strength Int. J. Appl. Ceram. Technol. (IF 2.1) Pub Date : 2024-03-14 Haizhen Yang, Wei Luo, Yufeng Xia, Cuijiao Ding, Yi Zhao, Yunpan Xiang, Wenjie Yuan
Calcium hexaaluminate (CA6) based castables with low thermal conductivity and sufficient strength were conveniently prepared by foaming and incorporating alumina bubbles. The pores are derived from stabilizing the liquid foams by the surfactant (air‐entraining agent) and hollow structure of alumina bubbles. The thermal and physical properties of CA6 based castables depended on the approaches producing
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Effect of the hydrotalcite formation on the fracture behavior and corrosion resistance of HA‐bonded alumina‐spinel castables Int. J. Appl. Ceram. Technol. (IF 2.1) Pub Date : 2024-03-12 Suchen Xu, Wenjing Liu, Ning Liao, Mithun Nath, Yawei Li
Hydratable alumina‐bonded castable is a promising non‐cement bonded refractory for ladle lining. An in situ formation of layered double hydroxides (Mg–Al hydrotalcite, M–A–H) using reactive MgO powders is proposed as a means of enhancing the castables during curing, drying, and after the high‐temperature treatment. The formation of hydrotalcite, spinel transformation, pore structure, mechanical properties
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Study of online tensile properties for continuous ceramic fibers under high‐temperature loads Int. J. Appl. Ceram. Technol. (IF 2.1) Pub Date : 2024-03-12 Chi Zhang, Liquan Jiang, Hao Yu, Kunkun Zhu, Weilin Xu, Wenbin Li
In this study, a self‐developed online test platform for high‐temperature mechanical properties was utilized to test the tensile properties of three continuous ceramic fibers from room temperature to 1 000°C. It was observed that the tensile strength of all tested continuous ceramic fibers decreased significantly with increasing temperature. Specifically, significant peeling of the surface organic
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Highly stable CuFe1.2Al.8O4 catalyst with low CO selectivity for hydrogen production in HT‐PEMFCs application Int. J. Appl. Ceram. Technol. (IF 2.1) Pub Date : 2024-03-11 Qiuwan Shen, Gaokui Chen, Jinli Ren, Min Yan, Martin Andersson, Shian Li
Methanol steam reforming (MSR) is considered as an effective way to provide on‐board hydrogen production technology for fuel cell applications. CuFe1.2Al.8O4 spinel catalyst was synthesized by sol–gel method and the chemical and physical properties were studied in‐depth. X‐ray diffraction, hydrogen‐temperature programmed reduction (H2‐TPR), BET, and scanning electron microscopy were used to characterize
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Sintering of Si3N4–SiC–MoSi2 composites additively manufactured by Multi Material Jetting Int. J. Appl. Ceram. Technol. (IF 2.1) Pub Date : 2024-03-04 Eveline Zschippang, Willy Kunz, Steven Weingarten, Lisa Gottlieb, Anne‐Kathrin Wolfrum
The aim of this work was to investigate the sintering behavior of Si3N4–SiC–MoSi2 composites manufactured by the Multi Material Jetting (MMJ) process. Therefore, electrically conductive and insulating Si3N4–SiC–MoSi2 composites were printed using MMJ. Samples were sintered in a gas‐pressure furnace at 6 and 31 atm, respectively. The density, microstructure, and crystalline phase composition were investigated
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Sludge‐based geopolymer materials: A review Int. J. Appl. Ceram. Technol. (IF 2.1) Pub Date : 2024-03-04 Xiangqing Kong, Jiarong Shi, Yidan Shen, Wenjiao Zhang, Ying Fu
Sludge refers to the solid waste produced after sewage treatment. Unreasonable disposal of sludge can cause environmental pollution. Nonetheless, the sludge contains large amounts of silica‐aluminate, which has pozzolanic activity by treatment, and the sludge can be used as a sustainable building material. The previous studies have recommended that it is reasonable to produce geopolymers, that is,
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Effect of TiO2 addition on microstructure and mechanical properties of Al2O3 ceramic joints brazed with Ag‐CuO fillers Int. J. Appl. Ceram. Technol. (IF 2.1) Pub Date : 2024-03-04 Mengjuan Yang, Jian Zhao, Shengpeng Hu, Wenlong Zhou, Wei Zhou, Wei Fu, Xiaoguo Song
In our work, 0.5 mol.% TiO2 was added to Ag‐xCuO (x = 2, 4, 8 mol.%) fillers whose compositions at 1050°C were in the L2 single liquid phase region, the boundary of the miscible phase region, and the L1+L2 miscible phase region, respectively. The role of TiO2 was derived by comparing the quenching microstructure of the fillers on the Al2O3 ceramics and the effect on the interfacial microstructure and
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Enhancing heat dissipation in polyurethane sheets through the incorporation of freeze‐dried aluminum nitride nanofiber Int. J. Appl. Ceram. Technol. (IF 2.1) Pub Date : 2024-03-04 Md. Shakhawat Hossain, Koji Nakane
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Dielectric properties of polycrystalline and single‐crystal magnesium oxide at high temperatures Int. J. Appl. Ceram. Technol. (IF 2.1) Pub Date : 2024-03-02 Alan Devoe, Hung Trinh, Fatih Dogan
The electrical properties of high‐purity magnesium oxide (MgO) samples sintered between 1500 and 1650°C were investigated up to 800°C. Dielectric constant, loss tangent and electrical conductivity were measured between 25 and 800°C. Optimum electrical properties were obtained for the sample sintered at 1600°C. The impurities in polycrystalline and single crystal MgO were discussed to understand their
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Development of β‐SiAlON/12H composite and their cutting performance on Inconel 718 turning Int. J. Appl. Ceram. Technol. (IF 2.1) Pub Date : 2024-03-02 Gökhan Kula, Ferhat Kara
In this study, the development of β‐SiAlON/12H polytype composites for the turning of Inconel 718 was investigated. Various sintering additives, including La2O3, Sm2O3, Y2O3, and their combinations, were used to obtain β‐SiAlON/12H polytype composites. It was found that β‐SiAlON/12H polytype composite with a reasonable amount (12%–14%) of the 12H phase was developed by using La2O3–Y2O3 as codopant
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Recycling of granite sludge for the preparation of high‐strength glazed glass‐ceramics using stepwise sintering Int. J. Appl. Ceram. Technol. (IF 2.1) Pub Date : 2024-02-28 Jinshan Lu, Changyou Liu, Jian Zhou
The reutilization of granite sludge generated in granite cutting and processing possesses economic and ecological benefits. In this study, high‐strength glazed glass‐ceramics were prepared entirely from granite powder using dense sintering and instantaneous glaze firing. The densification and glaze formation are clarified in terms of phase evolution to study their effects on the flexural strength and
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Planetary ball milling induced piezocatalysis for dye degradation using Bi2VO5.5 Int. J. Appl. Ceram. Technol. (IF 2.1) Pub Date : 2024-02-28 Manish Kumar, Imen Kebaili, Imed Boukhris, Rahul Vaish
The mechanochemical ball milling process at 650°C for 5 h formed the single‐phase Bi2VO5.5 powder, which was tested as a catalyst for methylene blue (MB) dye degradation. X‐ray diffraction validated phase formation. A scanning electron microscope inspection verified the presence of grains with irregular shapes. Piezocatalytic MB dye degradation with a .4 g BV sample was ∼67% after 90 min in a ball
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Influence of SiC content in B4C–nSiC composites corrosion in molten FLiNaK salt at 800°C Int. J. Appl. Ceram. Technol. (IF 2.1) Pub Date : 2024-02-28 Kui Wang, Junhong Jia, Wei Chen, Junjie Hui, Nairu He, Shengqiang Ma
The present study investigates the influences of SiC incorporation on the microstructure and corrosion behavior of B4C–nSiC composites in molten FLiNaK salt at 800°C. The corrosion characteristics and mechanisms of B4C–nSiC composites in molten FLiNaK salt were thoroughly characterized and extensively discussed. The B4C–nSiC composites exhibited a more refined grain size and lowered apparent porosity
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Effect of Er2O3/MgO ratio on mechanical and thermal properties of Si3N4 ceramics Int. J. Appl. Ceram. Technol. (IF 2.1) Pub Date : 2024-02-28 Zhuoqun Han, Jia Liu, Weiwei Wang, Qingxuan Zhou, Zhicheng Zhao, Yongning Han, Yingying Wang, Yang Wang, Futian Liu, Ling Li
Si3N4 ceramics with high mechanical properties and thermal conductivity, exhibiting fine and bimodal microstructure, were prepared by adjusting the Er2O3/MgO ratio and hot‐pressing sintering at 1800°C for 4 h. The microstructure, grain distribution, lattice oxygen content, mechanical properties, and crack propagation process of the sintered bulk samples were systematically investigated. It was found
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Nuclear radiation shielding performance of the new lead‐free TeO2–Bi2O3–ZnO–BaF2 glass Int. J. Appl. Ceram. Technol. (IF 2.1) Pub Date : 2024-02-28 Shiyu Yin, Zhizhi Zhang, Yu Xiang, Qianqian Qiao, Guanzhou Ding, Xianchao Huang, Qiuhan Lin
This paper studied the radiation shielding properties of new lead‐free telluride glass with different BaF2 content. The 65TeO2–15Bi2O3–(20 − x)ZnO–xBaF2 glass systems (where x = 1, 3, 5, 7, 9 mol%) were tested through the X‐ray diffraction, ultraviolet–visible spectrophotometer, and differential scanning calorimetry. The glass system exhibited good thermal stability and a uniform surface without surface
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Effects of graphene content in alkaline silicate electrolyte on AA1060 pure aluminum micro‐arc oxidation coating Int. J. Appl. Ceram. Technol. (IF 2.1) Pub Date : 2024-02-24 Da‐long Li, Xin Jing, Han Chen, Kun Sun, Wei Chen, Hua‐gui Huang, Wei‐jie Ren
Ceramic coatings were obtained by micro‐arc oxidation (MAO) on the surface of AA1060 pure aluminum in alkaline silicate electrolyte with the addition of graphene. The effects of graphene contents in the range of 0–.30 g/L in the electrolyte on surface morphology, corrosion resistance, and wear resistance of the ceramic coatings were investigated. The outer surface structure, outer surface element content
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In‐situ reaction sintered ReB2–B4C composite by reactive spark plasma sintering Int. J. Appl. Ceram. Technol. (IF 2.1) Pub Date : 2024-02-22 Ying Long, Shixuan Wang, Guihao Zhang, Hua‐Tay Lin
The high cost of ReB2 limits its application as a member of novel high‐hardness materials, which can be alleviated by forming composites with cheap compound(s). In the present study, a dense ReB2–B4C composite was fabricated via in situ reactive sintering by spark plasma sintering with Re and B13C2 (Re:B = 1:20) as raw materials. The phase composition, microstructure, Vickers hardness, and fracture
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Effects of preform structure on microstructure and mechanical properties of long/short fiber‐coupled C/C–SiC composites Int. J. Appl. Ceram. Technol. (IF 2.1) Pub Date : 2024-02-22 Zhiyong Ye, Yalei Wang, Xiang Xiong, Jinming Wang, Tongqi Li, Huaifei Liu, Zaidong Liu, Yanbin Wei
C/C–SiC composites with four different preform structures were prepared via chemical vapor infiltration and reactive melt infiltration (RMI). The effects of preform structure on the microstructure and mechanical properties of the C/C–SiC composites were thoroughly investigated. The results indicate that the porous C/C composites with multidirectional long/short fiber‐coupling exhibited consistent pore
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Hydration properties of magnesium phosphate cement paste mixed with metakaolin and silica fume Int. J. Appl. Ceram. Technol. (IF 2.1) Pub Date : 2024-02-22 Runqing Liu, Wei Wang, Yuanquan Yang
Magnesium phosphate cement (MPC) exhibits a faster setting time and higher early strength, making it suitable for crack repair. However, its application in civil engineering is hindered by its fast initial hydration rate and poor water resistance. To address these limitations, metakaolin (MK) and silica fume (SF) were utilized to enhance the properties of MPC. The effects of MK and SF on the setting
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Comparative analysis on corrosion behavior of lightweight and dense mullite–corundum refractories: Role of Si-rich phase Int. J. Appl. Ceram. Technol. (IF 2.1) Pub Date : 2024-02-07 Yuchi Liu, Yunqin Gao, Hongfeng Yin, Yalou Xin, Yun Tang, Hudie Yuan, Kewei Sun
The corrosion resistance of lightweight and dense mullite–corundum refractories to cement materials was examined. The specimens following static crucible treatment were investigated using phase analysis, microstructure, and thermodynamic simulation. The results reveal that diffusion of the silica-rich phase enhances alumina saturation solubility in the slag, reducing the corrosion resistance of the
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Fabrication of Si3N4 ceramics substrates with high thermal conductivity by tape casting and gas pressure sintering Int. J. Appl. Ceram. Technol. (IF 2.1) Pub Date : 2024-02-07 Jixue Zhao, Yun Liu, Yuanhang Zheng, Xiaolei Li, Tianyi Sui, Bin Lin
In this paper, high thermal conductivity Si3N4 ceramics were successfully fabricated through exploring and optimizing the tape casting process. The impact of various organic additives on the rheological characteristics of Si3N4 slurry was explored, and the pore size distribution and microstructure of the green tapes at different solid loadings were investigated, as well as the microstructure of Si3N4
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Mechanical properties and microstructure evolution of KD-SA SiCf/BN/SiC CMCs oxidized at different temperatures Int. J. Appl. Ceram. Technol. (IF 2.1) Pub Date : 2024-02-07 Liuwei Li, Hao Qin, Chunjing Liao, Xiao You, Han Luo, Yudong Xue, Xuezheng Yue, Jinshan Yang, Xiangyu Zhang, Shaoming Dong
Silicon carbide fiber-reinforced SiC ceramic matrix composites (SiCf/SiC CMCs) based on a domestic KD-SA SiC fiber were exposed to a wet oxygen atmosphere for 135 h at 800, 1100, and 1300°C. The evolution of the microstructure and mechanical properties of SiCf/SiC CMCs have been systematically investigated following oxidation. For weight change, CMC-1300 showed the greatest gain (0.394%), followed
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Antimicrobial characteristics of the Li2O–ZrO2–Si2O bioactive glass and glass-ceramic for bone regeneration and wound healing Int. J. Appl. Ceram. Technol. (IF 2.1) Pub Date : 2024-02-03 Natália Morelli Possolli, Henrique Borba Modolon, Hilária Mendes de Souza, Claus Tröger Pich, Oscar Rubem Klegues Montedo, Elidio Angioletto, Sabrina Arcaro
Infections cause significant complications in surgical cases involving fractures and implants. Biomaterials, particularly bioactive glass, are known for their biocompatibility and tissue regeneration potential. The integration of bactericidal properties with bioactive glasses could prove pivotal in preventing infections during bone and wound regeneration. The LZS (Li2O–ZrO2–Si2O) glass system, recognized
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Synaptic and resistive switching behaviors of Sm-doped HfO2 films for bio-inspired neuromorphic calculations Int. J. Appl. Ceram. Technol. (IF 2.1) Pub Date : 2024-02-01 Jian-Yuan Zhu, Jia-Jia Liao, Jian-Hao Feng, Yan-Ping Jiang, Xin-Gui Tang, Xiao-Bin Guo, Wen-Hua Li, Zhen-Hua Tang, Yi-Chun Zhou
Artificial neural network-based computing is anticipated to surpass the von Neumann bottleneck of traditional computers, thus dramatically boosting computational efficiency and showing a wide range of promising applications. In this paper, sol−gel deposition was used to prepare thin films of samarium-doped hafnium dioxide (Sm:HfO2). When Sm is doped at a concentration of 4%, it mimics biological synapses;
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Phase separation during the direct powder bed fusion of SiC Int. J. Appl. Ceram. Technol. (IF 2.1) Pub Date : 2024-01-31 Benjamin W. Lamm, Omer Karakoc, Keyou Mao, Takaaki Koyanagi, Jian Liu, Yutai Katoh
Powder bed fusion (PBF) is an attractive additive manufacturing option for fabrication of SiC object with complex geometries. However, the density and microstructure controls remain a challenge. This study is aimed at understanding laser–SiC interactions, with emphasis on microstructure-processing relationships, to identify potential solutions for the process improvement. SiC tubes were fabricated
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Improved oxidation resistance while maintaining slag corrosion resistance of MgO–SiC–C refractories with moderate amounts of liquid phase Int. J. Appl. Ceram. Technol. (IF 2.1) Pub Date : 2024-01-30 Weijie Guo, Xu Zhao, Tianbin Zhu, Qilong Chen, Yawei Li, Xiaofeng Xu, Yibiao Xu, Yajie Dai, Wen Yan, Yuanjin Li, Xuyuan Wang
MgO–SiC–C refractories with superior hot strength, oxidation resistance and slag resistance have potential to become substitute refractories for matte smelting furnace. In the present work, the influence of glass powder addition on phase compositions, hot strength, oxidation resistance, and slag resistance of MgO–SiC–C refractories was investigated. The liquid phase introduced by glass powder filled
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Effect of infiltration temperature on graphitization and properties of diamond/SiC composites with SiC matrix Int. J. Appl. Ceram. Technol. (IF 2.1) Pub Date : 2024-01-30 Tianxiang Hong, Yuhong Chen, Ruibin Liu, Wanxiu Hai, Xiuling Zhang, Meiling Liu, Suo Yan
In this study, diamond/silicon carbide (SiC) composites were prepared by liquid Si infiltration. The effects of the infiltration temperature on the densification, diamond graphitization, and thermal conductivity of the composites were investigated. The effects of the diamond content on the thermal conductivity and bending strength were also explored. X-ray diffraction and Raman spectroscopy detected
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Sm and Mn doped enhancing the electrical properties of .68PMN–.32PT relaxor ferroelectric thin films Int. J. Appl. Ceram. Technol. (IF 2.1) Pub Date : 2024-01-31 Liang Chen, Changxing Zhao, Peng Jiang, Shuhong Xie, Kai Pan
(1−x)Pb(Mg1/3Nb2/3)O3–xPbTiO3 (PMN–PT) has attracted attention due to its excellent electrical properties as a typical relaxor ferroelectric material. High-quality Mn–Sm co-doped 0.68PMN–0.32PT thin films were synthesized on the Pt/Ti/SiO2/Si substrates by sol–gel based on spin coating method. The results show that 1 mol% Mn–2 mol% Sm co-doped PMN–PT thin films have high dielectric constant (εr ∼ 1895)
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Permeability prediction of porous aerostatic bearings through 3D morphology and fractal calculation method Int. J. Appl. Ceram. Technol. (IF 2.1) Pub Date : 2024-01-31 Jianwei Cui, Xiaoyu You, Hongjun Zhang, Jian Liu
Porous ceramics for aerostatic bearing restrictors were fabricated using carboxymethyl cellulose and polystyrene microspheres as pore formers. The three-dimensional morphology of the porous ceramics was nondestructively obtained using laser scanning confocal microscopy, and the processing information was eliminated by fitting the pore area fractal dimensions at different heights. A mathematical model
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Correlation study of random deposition for WC–12Co multiparticles on the TC18 substrates Int. J. Appl. Ceram. Technol. (IF 2.1) Pub Date : 2024-01-31 Xing Han, Chang Li, Siyu Li, Xinxue Chen
The TC18 titanium alloy as an aviation landing gear material is famous for its high strength and hardenability. However, under the influence of the harsh service environment, its corrosion resistance is relatively poor. WC–12Co ceramic material is one of the most widely used surface strengthening materials, and the coatings are often produced by high velocity oxygen fuel (HVOF) thermal spraying. In
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Analysis and prospect of thermodynamic behavior of aluminosilicate solid waste during ceramization Int. J. Appl. Ceram. Technol. (IF 2.1) Pub Date : 2024-01-31 Mengting Jiang, Wei Chen, Yuling Liu, Yong Du, Tengfei Deng
Aluminosilicate solid waste, primarily comprising red mud, coal gangue, fly ash, and tailings, is characterized by high annual production, low comprehensive utilization rate, and significant environmental damage. Currently, there is an urgent need for effective methods to manage and valorize aluminosilicate solid wastes. Thermodynamic investigations enable the assessment of phase transition behaviors
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Preparation and thermal shock resistance of solar thermal absorbing corundum ceramics for concentrated solar power Int. J. Appl. Ceram. Technol. (IF 2.1) Pub Date : 2024-01-31 Xiaohong Xu, Shaoheng Liu, Yang Liu, Jianfeng Wu, Jiaqi Yu, Yaqiang Shen
The absorptivity of solar thermal absorber materials affects the heliothermal conversion efficiency of concentrated solar power systems. The solar absorbing ceramics were prepared by the fixed mixture of bauxit, Fe2O3, and TiO2 with adding CuO in different percentages. The absorptivity and thermal shock resistance with the effect of adding CuO in different percentages were studied. Fe2O3 and TiO2 have
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Mechanical property and failure mechanism of coated Al2O3f/SiO2 composites by acoustic emission technology (AE) Int. J. Appl. Ceram. Technol. (IF 2.1) Pub Date : 2024-01-30 Xiang Yang, Mo Chen, Chen Kun, Zheng Zhou, Peng Zhi-hang, Sun Chen-cheng, Wu Wen-jun, Wen Jin, Cao Jian-hui
Al2O3f/SiO2 composites were fabricated by sol–gel process, with a density of 2.22 g/cm3, pyro carbon coating prepared via chemical vapor deposition. The interfacial bonding strength between the fiber and matrix was weakened, and the brittle fracture characteristics of the fiber under a high-temperature environment were improved, ensuring the integrity and reliability of the structure. The mechanical
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Corrosion behaviors of Ti3SiC2/Cu composites in molten salts Int. J. Appl. Ceram. Technol. (IF 2.1) Pub Date : 2024-01-30 Fuyan Liu, Chengzhi Du, Chenlong Wu, Rui Zhang
The corrosion behaviors of Ti3SiC2/Cu composites synthesized by spark plasma sintering technique were investigated at 900°C in three molten salts including NaCl, Na2SO4, and Na2CO3, and the related corrosion mechanism was discussed. The morphology and composition of the composites after corrosion were characterized by scanning electron microscopy and X-ray photoelectron spectroscopy. The results indicated
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Rapid geometric characterization of ceramics fragments through split Hopkinson pressure bar tests Int. J. Appl. Ceram. Technol. (IF 2.1) Pub Date : 2024-01-30 Dan Li, Bing Zhao, Maozhou Meng
The research on fracture mechanisms of brittle materials is extremely difficult such as the determination of the energy absorption modes and the geometric characteristics of debris. In this paper, a dynamic experimental fragment recovery device was developed to study the facture characteristics of A99 ceramics (the mass of Al2O3 accounts for 99%) based on the Split-Hopkinson pressure bar (SHPB) experiments
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Effect of cobalt oxide on characteristics of micro-arc oxidation coatings on TC11 alloy Int. J. Appl. Ceram. Technol. (IF 2.1) Pub Date : 2024-01-29 Manlan Zhu, Xinyue Lan, Ping Wang, Qiming Luo, Fengyu Sun
In order to improve the comprehensive performance of TC11 titanium alloy and make it more widely used in the field of oil and gas wells, cobalt oxide micro-powder from 0 to 0.8 g·L−1 was added in the electrolyte. The effects of cobalt oxide micro-powder concentration on properties of micro-arc oxidation (MAO) coatings were analyzed by scanning electron microscopy, X-ray diffraction, X-ray photoelectron
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Influence of drying conditions and plasticizer-to-binder ratio on the water-based tape casting of La0.6Sr0.4Co0.2Fe0.8O3−δ Int. J. Appl. Ceram. Technol. (IF 2.1) Pub Date : 2024-01-29 Kimia Y. Javan, Vincenzo M. Sglavo
Tape casting is a flexible technique for manufacturing scalable ceramic sheets. This study fabricated La0.6Sr0.4Co0.2Fe0.8O3−δ (LSCF6428) tapes using water-based tape casting. A high molecular weight plasticizer, polyethylene glycol 4000, was chosen to balance flexibility and mechanical strength. Adjusting the plasticizer-to-binder ratio (R-value) and increasing relative humidity during drying led
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Combustion synthesized boron carbide powders by different organic carbon sources and microwave absorbing properties Int. J. Appl. Ceram. Technol. (IF 2.1) Pub Date : 2024-01-26 Peilin Deng, Donghai Ding, Guoqing Xiao, Yan Mu, Xiaochuan Chong, Xing Hou
Boron carbide powders were synthesized by combustion synthesis using organics chitosan, dextrin, cellulose, starch, and polyvinyl chloride (PVC) as carbon sources. The microwave absorbing properties of boron carbide powders synthesized by different carbon sources were investigated. The results showed that the powders synthesized using organic compounds containing Cl and N atoms as carbon sources have
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Ultrafine WC–Co cemented carbide end mills prepared by spark plasma sintering and wear mechanism in milling of AISI H13 Int. J. Appl. Ceram. Technol. (IF 2.1) Pub Date : 2024-01-26 Boxiang Wang, Zhenhua Wang, Zengbin Yin, Weiwei Xu, Liyi Jiang, Juntang Yuan
Ultrafine tungsten carbide (WC)–cobalt (Co) and WC–(Ti,W)C–Co end mills were produced via spark plasma sintering. The wear mechanism of these end mills during machining of AISI H13 steel was investigated. WC–Co exhibits good mechanical properties (HV30: 2110 kg/mm2, KIC: 10.4 MPa/m1/2, TRS: 1990 MPa). Although the high hardness of WC–Co makes it show excellent resistance to abrasive wear, it suffers
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Properties and microstructures of porous corundum-spinel aggregates fabricated via the Kirkendall effect Int. J. Appl. Ceram. Technol. (IF 2.1) Pub Date : 2024-01-26 Yang He, Zhuo Mi, Qingjie Chen, Die Peng, Shilong Zhang, Nan Li
Four porous corundum-spinel aggregates were prepared from magnesia and α-Al2O3 micropowder via the Kirkendall effect. Effects of the particle size of magnesia (PSM, 0–74 μm, 0–15 μm, and 0–44 μm) and firing temperature (1100–1600°C) on the phase compositions, microstructures, pore characteristics of the prepared porous aggregates were investigated. As the firing temperature increased, the PSM influenced
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Use of alumina dispersant in alumina-spinel castable: Comparison between in situ and preformed spinels Int. J. Appl. Ceram. Technol. (IF 2.1) Pub Date : 2024-01-26 Satyam Kumar, Ritwik Sarkar
The role of alumina dispersant as a flow modifier, completely replacing fume silica, on the properties of preformed and in situ spinel-containing low cement high alumina castables was investigated with variations in spinel content and granulometry. Both 10 and 20 wt.% spinel-containing compositions were prepared using preformed spinel or magnesia in alumina castable compositions with vibratable and
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Preparation and application of microfiltration porous coal gangue–loess-based ceramic membrane Int. J. Appl. Ceram. Technol. (IF 2.1) Pub Date : 2024-01-24 Kang Liu, Ming Zhang, Miaoyu Li, Zhi Tong
The ceramic membrane is widely used in the field of domestic sewage treatment due to its high flexural strength, acid and alkali corrosion resistance, easy cleaning, and other advantages. This article uses coal gangue and loess as the main raw material (coal gangue:loess = 8:2), calcium carbonate as the pore-forming agent, and carboxymethyl cellulose as the binder. The ceramic membrane was prepared
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Effect of grain size on tribological behavior of hot-pressed boron carbide sliding against alumina balls Int. J. Appl. Ceram. Technol. (IF 2.1) Pub Date : 2024-01-23 Zhihui Zhou, Jie Xia, Minbo Wang, Ruidi Li, Tiechui Yuan
Boron carbide ceramics (B4C) have extraordinary hardness and well-abrasive resistance, while the tribological behavior of ceramic materials is complicated, which are affected by microstructures, mechanical properties, and surface characteristics, and so on. In this paper, the effect of grain size on the mechanical properties especially the wear resistance of hot-pressed B4C was investigated. The average
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Rapid assessment of the dependence of flexural elastic modulus on temperature through in-situ image analysis Int. J. Appl. Ceram. Technol. (IF 2.1) Pub Date : 2024-01-18 Junfeng Li, Delong Ma, Yiwang Bao
This study aimed to develop a method for rapid and precise measurement of the elastic modulus at high temperatures. High-temperature in-situ microscopy was used in conjunction with a testing apparatus to measure the deformation of a specimen in three-point bending test. The bending deflection was determined in situ by measuring the relative change between the test point on the specimen and a fixed
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Fabrication and properties of monolayer graphene reinforced Al2O3/TiN ceramic tool material Int. J. Appl. Ceram. Technol. (IF 2.1) Pub Date : 2024-01-18 Xianhua Tian, Qihang Sun, Xiaodong Yang, Qingqing Wang, Lei Wang, Kun Wu
Al2O3/TiN/graphene ceramic tool materials were prepared by spark plasma sintering technology and the strengthening and toughening mechanisms were studied. The influence of monolayer graphene content on the mechanical properties and microstructure of the composite material were analyzed and the strengthening and toughening mechanisms were researched. The results showed that with an addition of .5 vol
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Microstructure and microwave-absorbing properties of B4C/C composite powders produced by combustion synthesis with an AC foaming agent Int. J. Appl. Ceram. Technol. (IF 2.1) Pub Date : 2024-01-18 Xiaoqian Zhou, Donghai Ding, Guoqing Xiao, Yan Mu, Boying Xing, Peilin Deng, Yanjie Zhang
To develop microwave-absorbing properties of dielectric ceramics, B4C/C composite powders were prepared by combustion synthesis with B2O3, polyvinyl alcohol, and Mg as the raw materials in this work. The XRD, Raman, scanning electron microscope with energy-dispersive spectroscopy, and VNA network analysis carried out the effects of the addition of azodicarbonamide (AC) foaming agent on the phase compositions
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Mechanical properties of SiCf/SiC composites with h-BN interphase formed by the electrophoretic deposition method Int. J. Appl. Ceram. Technol. (IF 2.1) Pub Date : 2024-01-17 Katsumi Yoshida, Mayuko Kasakura, Anna Gubarevich, Masaki Kotani
Silicon carbide fiber–reinforced silicon carbide (SiCf/SiC) composites have been expected to be used as next-generation heat resistant structural materials with high reliability. The fiber/matrix interface for SiCf/SiC composites plays an important role for toughening and strengthening, and it is important to form the optimal interphase for SiCf/SiC composites. In this study, hexagonal-boron nitride
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Morphological and structural evaluation of spark plasma sintered calcium silicate ceramics Int. J. Appl. Ceram. Technol. (IF 2.1) Pub Date : 2024-01-17 Maroua H. Kaou, Mónika Furkó, Ben Zine H. Rachid, Katalin Balázsi, Csaba Balázsi
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Synthesis of highly disperse NbSi2–Si3N4 and Si3N4–NbN composite powders Int. J. Appl. Ceram. Technol. (IF 2.1) Pub Date : 2024-01-17 Roman Lytvyn, Iryna Kud, Oleksandr Myslyvchenko, Roman Medyukh, Larysa Krushynska, Ostap Zgalat-Lozynskyy
The behavior of reaction powder mixtures of stoichiometric compositions calculated for the synthesis of higher niobium nitride and silicide in the temperature range 800–1400°С in vacuum according to the reactions 4Nb + Si3N4 and 3Nb + 2Si3N4, respectively, has been investigated. The decomposition of Si3N4 is accompanied by the formation of lower nitride and lower silicide phases of niobium. The content
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Material design using calculation phase diagram for refractory high-entropy ceramic matrix composites Int. J. Appl. Ceram. Technol. (IF 2.1) Pub Date : 2024-01-17 Yutaro Arai, Manami Saito, Akane Samizo, Ryo Inoue, Keishi Nishio, Yasuo Kogo
To achieve Si-free refractory ceramic matrix composites exposed to an oxidizing atmosphere at approximately 2000°C, a Ti–Zr–Mo ternary alloy melt-infiltration (MI) method was developed for the production of carbon fiber-reinforced refractory high-entropy ceramic matrix composites (C/RHECs), with high-entropy carbides serving as the matrix. This approach was designed using calculation phase diagrams
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Mechanical properties due to competition behavior between damage and recovery of self-healing fiber-reinforced ceramics Int. J. Appl. Ceram. Technol. (IF 2.1) Pub Date : 2024-01-16 JangWon Lee, Yuki Akutsu, Wataru Nakao
The phenomenon caused by the competition between self-healing and crack propagation of self-healing fiber-reinforced ceramics was succeeded to be quantified as a new mechanical function. To quantify, it was measured in detail that the creep deformation as time variation of the self-healing composite under various stresses. In particular, a detailed analysis will be carried out focusing on the time
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Bioactive potassium and sodium niobate (K0.5Na0.5)NbO3 synthesized by solid-state reaction and sol–gel methods Int. J. Appl. Ceram. Technol. (IF 2.1) Pub Date : 2024-01-15 Suzana Noronha Ferreira Ribeiro, Amal Elzubair Eltom, Rubens Lincoln Santana Blazutti Marçal, Daniel Navarro Da Rocha, Mariáh Cationi Hirata, Eric Domingos Mariano, Izabel Fernanda Machado, Marcelo Henrique Prado Da Silva
This study proposes an innovative approach in the quest for piezoelectric materials, aiming to replace lead-based ceramics (PZTs), known for their high toxicity. Potassium sodium niobate (KNN) compounds were chosen as a promising alternative. While the synthesis of KNN via solid-state reaction (SSR) is common, maintaining the correct stoichiometry is challenging. In this work, we employed sol–gel (SG)
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Effect of BN interfacial layer on the mechanical behavior of SiC fiber reinforced SiC ceramic matrix composites Int. J. Appl. Ceram. Technol. (IF 2.1) Pub Date : 2024-01-15 Mingwei Chen, Haipeng Qiu, Yuliang Zhao, Bingyu Zhang, Shanhua Liu, Wendong Luo, Xin Ma, Weijie Xie, Yi Chen, Qiyue Zhang, Yuliang Zhao
Boron nitride (BN) interfacial layer with controlled thickness and structure was prepared on the surface of near stoichiometric ratio SiC fiber preforms by a chemical vapor deposition process, and the SiC/SiC composites were obtained by polymer precursor infiltration and pyrolysis process. The microstructure of the BN interfacial layer and SiC/SiC composites was tested by scanning electron microscopy
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A strategy for low thermal conductivity of lutetium oxyorthosilicate ceramics fabricated via texture engineering Int. J. Appl. Ceram. Technol. (IF 2.1) Pub Date : 2024-01-15 Xuefeng Wang, Lingcong Fan, Heng Pan, Xue Zhang, Ying Shi, Jianjun Xie, Fang Lei, Lei Zhang
Submicrometer lutetium-gadolinium oxyorthosilicate ((Lu0.95Gd0.05)2SiO5, LGSO) powder with a magnetic susceptibility of 4.19 × 10−6 (5.4 times that of lutetium oxyorthosilicate) was synthesized via a sol-gel method. Slip casting with a 6 T assisted magnetic field and pressureless sintering at 1600°C for 16 h in the air effectively produced the textured LGSO ceramics with an orientation factor f of
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Phase transition and thermal stability of ceramics from Na-based geopolymers Int. J. Appl. Ceram. Technol. (IF 2.1) Pub Date : 2024-01-14 Binghuan Gao, Yangyang Li, Hyeonjin Son, Seongwan Jang, Hee-Soo Lee, Chang-Jun Bae
Geopolymer ceramics undergo a series of thermal phase transitions, progressing from an amorphous geopolymer gel to a crystalline phase, and eventually to an amorphous glass phase as the temperature increases. However, there is a lack of mechanism understanding regarding to the crystallization process and the subsequent thermal degradation. Here, we fundamentally investigated the kinetics of nepheline
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Phase equilibrium investigations and thermodynamic modeling of the HfO2–Ta2O5 system Int. J. Appl. Ceram. Technol. (IF 2.1) Pub Date : 2024-01-11 Manuel Löffler, Olga Fabrichnaya
The HfO2–Ta2O5 system was investigated using two distinct methods: the equilibration method at temperatures ranging from 1 573 to 1 873 K and the differential thermal analysis method up to 2 473 K. To identify the phases, X-ray diffraction (XRD) and scanning electron microscopy with energy-dispersive X-ray spectroscopy (SEM/EDX) were employed. The temperature of the eutectic reaction L→Hf6Ta2O17+Ta2O5
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Finite element analysis of temperature distribution in 3YSZ ceramics during conventional sintering Int. J. Appl. Ceram. Technol. (IF 2.1) Pub Date : 2024-01-11 Shubham Kumar Singh, Annu Kumar Lakshya, Anirban Chowdhury, Tamoghna Chakrabarti
The presence of a temperature gradient (if any) within the ceramic sample is casually ignored during the sintering of ceramic shapes. The present work exposes some serious repercussions of such a thought process and provides simple solutions to mitigate the same; 3 mol.% yttria-doped zirconia ceramic was used for this study. With the help of the combinatorial finite element analysis (FEA) model and
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Improving the mechanical property of the castables bonded with hydratable magnesium carboxylate by incorporating MgO fumes Int. J. Appl. Ceram. Technol. (IF 2.1) Pub Date : 2024-01-11 Jianjun Chen, Guoqing Xiao, Donghai Ding, Luyan Sun, Yunfei Zang, Chaofan Yin, Haixia Feng, Binbin Dong, Qingfeng Wang, Yuejin Qian
Previous studies have indicated that hydratable magnesium carboxylate (HMC) exhibits potential as an MgO-based binder, but its limited medium-temperature strength has hindered its widespread industrial application. In this study, the incorporation of MgO fumes into castables is intended to react with microsilica to form magnesium–silicate–hydrate (M–S–H), and the synergistic effect of HMC and M–S–H