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Three-dimensional graphene and its composite for gas sensors Rare Met. (IF 2.161) Pub Date : 2021-01-18 Meng Hao, Wen Zeng, Yan-Qiong Li, Zhong-Chang Wang
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Sensing mechanism of Ag/α-MoO 3 nanobelts for H 2 S gas sensor Rare Met. (IF 2.161) Pub Date : 2021-01-12 Shi-Kai Shen, Xin-Lei Cui, Chuan-Yu Guo, Xin Dong, Xian-Fa Zhang, Xiao-Li Cheng, Li-Hua Huo, Ying-Ming Xu
Sensing mechanism is still a big problem in the field of gas sensor. In-depth study of the sensing mechanism can provide better ideas for the design of sensing materials, and it is also more conducive to the improvement in gas-sensing performance. In this work, Ag/α-MoO3 material was obtained by loading Ag in α-MoO3 nanobelts prepared by hydrothermal method. The material was characterized by field
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Multi-core–shell-structured LiFePO 4 @Na 3 V 2 (PO 4 ) 3 @C composite for enhanced low-temperature performance of lithium-ion batteries Rare Met. (IF 2.161) Pub Date : 2021-01-12 Xing-Xing Gu, Shuang Qiao, Xiao-Lei Ren, Xing-Yan Liu, You-Zhou He, Xiao-Teng Liu, Tie-Feng Liu
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Phase-field simulation of re-dissolution of γ′ phase in Ni–Al alloy by continuous and second-order aging treatment Rare Met. (IF 2.161) Pub Date : 2021-01-12 Kun-Wu Lai, Shu-Jing Shi, Zheng-Wei Yan, Yong-Sheng Li, Sheng-Shun Jin, Dong Wang, Shahid Maqbool
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Improving phase transition temperature of VO 2 via Ge doping: a combined experimental and theoretical study Rare Met. (IF 2.161) Pub Date : 2021-01-12 Lin Wang, Yu-Qi Hao, Wei Ma, Sen Liang
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Thermal stability of bimodal grain structure in a cobalt-based superalloy subjected to high-temperature exposure Rare Met. (IF 2.161) Pub Date : 2021-01-12 Cheng-Lin Li, Jeong Mok Oh, Seong-Woo Choi, Xin-Ming Mei, Jae-Keun Hong, Jong-Taek Yeom, Qing-Song Mei, Zhen-Tao Yu, Chan Hee Park
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Fluorescent graphene oxide derived from carbonized citric acid for copper(II) ions detection Rare Met. (IF 2.161) Pub Date : 2021-01-10 Wen-Dan Li, Xiang-Yu Zeng, Gang-Yu Lv, Zhen-Hui Liang, Qi-Jie Liu, Wan-Qi Fu, Jiu-An Zhang, Yan-Xian Feng, Hao-Yi Wu
Fluorescent graphene oxide (GO) nanoparticles were obtained from the thermal carbonization of citrate acid. Depending on the synthesizing temperature, the size of GO varied from several to several hundred nanometers. Owing to the confinement from the size, green and blue emissions at around 504 and 450 nm were observed from the GO suspension. These emissions could be dynamically quenched by titrating
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In situ deformation behavior of TC21 titanium alloy with different α morphologies (equiaxed/lamellar) Rare Met. (IF 2.161) Pub Date : 2021-01-09 Wei Long, Mei-Gui Ou, Xi-Qin Mao, Yi-Long Liang
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Dielectric relaxation and conduction behaviors of Aurivillius Na 0.5 Bi 4.5 Ti 4 O 15 ceramics with Na doping Rare Met. (IF 2.161) Pub Date : 2021-01-09 Fida Rehman, Jing-Bo Li, Pervaiz Ahmed, Muhammad Sheraz Khan, Yasir Saeed, Asma khan, Muhammad Zubair
Aurivillius Na0.5Bi4.5Ti4O15 and Bi4Ti3O12 compounds were synthesized via solid-state reaction technique. X-ray powder diffraction study confirmed monophasic four-layered Na0.5Bi4.5Ti4O15 and three-layered Bi4Ti3O12 ceramics. Dielectric relaxation and conduction behaviors of Na-contained Na0.5Bi4.5Ti4O15 ceramics were thoroughly investigated in a large scale of temperature of 30–650 °C and frequency
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Fabrication and characterization of nanoporous Ag–Pt alloy Rare Met. (IF 2.161) Pub Date : 2021-01-07 Tao Yin, Fan-Yun Meng, Min Zhang, Ying-Wei Yan
Nanoporous Ag–Pt bi-metallic alloy was fabricated by free dealloying of amorphous Ag-based precursor with the nominal composition of Ag38.25Pt0.5Cu38.75Si22.5. The noble Ag and Pt were left after the less noble Cu and Si dissolved in a certain acid solution. Bi-continuous nanoporous microstructure was formed with asymmetric ligaments and pores with typically 30–200 nm in width. The trace addition of
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Stacking fault, dislocation dissociation, and twinning in Pt 3 Hf compounds: a DFT study Rare Met. (IF 2.161) Pub Date : 2021-01-07 Shun-Meng Zhang, Kai Xiong, Cheng-Chen Jin, Zong-Bo Li, Jun-Jie He, Yong Mao
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High-pseudocapacitance of porous and square NiO@NC nanosheets for high-performance lithium-ion batteries Rare Met. (IF 2.161) Pub Date : 2021-01-07 Ze-Lin Cai, Zi-Lin Peng, Meng-Qi Wang, Jia-Yan Wu, Hao-Sen Fan, Yu-Fei Zhang
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Photocatalytic and photochemical processes of AgCl/TiO 2 studied with a fully integrated X-ray photoelectron spectrometer Rare Met. (IF 2.161) Pub Date : 2021-01-07 Kai Zhou, Wen-Lu He, Xiao Zhang, Bin Zhang, Xiang-Nan Gong, Kai-Wen Wang, Zhi-Chao Zhang, Xi-Lan Zhang, Zhi-Ning Xia, Xiao-Yuan Zhou
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Rare earth element-doped porous In 2 O 3 nanosheets for enhanced gas-sensing performance Rare Met. (IF 2.161) Pub Date : 2021-01-07 Wen-Hui Zhang, Su-Jun Ding, Qing-Song Zhang, Hui Yi, Zi-Xiang Liu, Meng-Li Shi, Rong-Feng Guan, Lu Yue
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Electrochemical dissolution behavior of gold and its main coexistent sulfide minerals in acid thiocyanate solutions Rare Met. (IF 2.161) Pub Date : 2021-01-07 Guan Le, Wen-Juan Li, Kun Song, Yong-Sheng Song, Yong Chen, An-Ping Bai, Yu Cheng
Abstract Electrochemical tests were developed to investigate the electrochemical dissolution behavior of gold and its main coexistent sulfide minerals in acid thiocyanate solutions. The optimal leaching conditions for gold in acidic thiocyanate system were pH 2, 0.15 mol·L−1 thiocyanate and 0.2 g·L−1 Fe3+. Fe3+ addition to the acidic thiocyanate system promoted gold dissolution significantly, arsenopyrite
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Chemical synthesis and characterization of SmCo 5 /Co magnetic nanocomposite particles Rare Met. (IF 2.161) Pub Date : 2021-01-07 Ying Dong, Tian-Li Zhang, Hui Wang, Xin Liu, Cheng-Bao Jiang
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When thermoelectric materials come across with magnetism Rare Met. (IF 2.161) Pub Date : 2021-01-07 Chen-Chen Zhao, Chong Xiao
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Cobalt monosulfide nanofibers: ethanol sensing and magnetic properties Rare Met. (IF 2.161) Pub Date : 2021-01-07 Zhi-Da Hu, Xi-Yu Sun, Hang-Fei Li, Ya-Ru Kang, Xian-Qiang Song, Peng Wang, Qiao-Tong Luan, Xue-Dong Wang, Zong-Tao Chi, Wan-Feng Xie
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Enhanced formaldehyde sensitivity of two-dimensional mesoporous SnO 2 by nitrogen-doped graphene quantum dots Rare Met. (IF 2.161) Pub Date : 2021-01-07 Zhen-Lu Chen, Ding Wang, Xian-Ying Wang, Jun-He Yang
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Hot tensile deformation behavior and constitutive model of ZK61M high-strength magnesium alloy sheet Rare Met. (IF 2.161) Pub Date : 2021-01-07 Liu Yang, Yong-Chuan Duan, Ying-Ping Guan, Zhen-Hua Wang
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A novel three-step approach to separate cathode components for lithium-ion battery recycling Rare Met. (IF 2.161) Pub Date : 2021-01-07 Yun Zhao, Ling-Zhe Fang, Yu-Qiong Kang, Li Wang, Yu-Nan Zhou, Xin-Yi Liu, Tao Li, Yan-Xi Li, Zheng Liang, Zhe-Xu Zhang, Bao-Hua Li
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Plate-like carbon-supported Fe 3 C nanoparticles with superior electrochemical performance Rare Met. (IF 2.161) Pub Date : 2021-01-07 Chuan Chen, Sen Qian, Tian-Hao Yao, Jing-Hong Guo, Hong-Kang Wang
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Recent advance in single-atom catalysis Rare Met. (IF 2.161) Pub Date : 2021-01-07 Zeng-Xi Wei, Ya-Ting Zhu, Jin-Yuan Liu, Zhi-Cheng Zhang, Wen-Ping Hu, Hui Xu, Yue-Zhan Feng, Jian-Min Ma
Single-atom catalysts (SACs) have obtained a great deal of attention in many catalytic fields due to the high atom utilization efficiency and high catalytic activity. Recently, great achievements on SACs have been made for thermocatalysis, electrocatalysis, and photocatalysis which play an important role in obtaining value-added products. However, it remains a great challenge to fabricate SACs with
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Electrodeposited transparent PEDOT for inverted perovskite solar cells: improved charge transport and catalytic performances Rare Met. (IF 2.161) Pub Date : 2021-01-07 Cong-Tan Zhu, Ying Yang, Fei-Yu Lin, Yuan Luo, Shu-Peng Ma, Liu Zhu, Xue-Yi Guo
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Recent advances and perspective in metal coordination materials-based electrode materials for potassium-ion batteries Rare Met. (IF 2.161) Pub Date : 2021-01-07 Fei Wang, Yong Liu, Hui-Jie Wei, Teng-Fei Li, Xun-Hui Xiong, Shi-Zhong Wei, Feng-Zhang Ren, Alex A. Volinsky
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Interfacial bonding mechanism of Cu/Al composite plate produced by corrugated cold roll bonding Rare Met. (IF 2.161) Pub Date : 2021-01-07 Tao Wang, Xiang-Yu Gao, Zhi-Xiong Zhang, Zhong-Kai Ren, Yan-Yang Qi, Jing-Wei Zhao
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Enhanced catalytic performance for selective oxidation of propene with O 2 over bimetallic Au–Cu/SiO 2 catalysts Rare Met. (IF 2.161) Pub Date : 2021-01-07 Xin Guo, Xue-Quan Sun, Yun Guo, Yang-Long Guo, Yun-Song Wang, Li Wang, Wang-Cheng Zhan
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Schiff-base-rich g-C x N 4 supported PdAg nanowires as an efficient Mott–Schottky catalyst boosting photocatalytic dehydrogenation of formic acid Rare Met. (IF 2.161) Pub Date : 2021-01-07 Hu Liu, Xue-Xiang Li, Xin-Yang Liu, Zhen-Hui Ma, Zhou-Yang Yin, Wei-Wei Yang, Yong-Sheng Yu
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A review on Ti 3 C 2 T x -based nanomaterials: synthesis and applications in gas and humidity sensors Rare Met. (IF 2.161) Pub Date : 2020-11-25 Qiu-Ni Zhao, Ya-Jie Zhang, Zai-Hua Duan, Si Wang, Can Liu, Ya-Dong Jiang, Hui-Ling Tai
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SnO 2 quantum dots modified N-doped carbon as high-performance anode for lithium ion batteries by enhanced pseudocapacitance Rare Met. (IF 2.161) Pub Date : 2020-11-24 Cui-Ping Wu, Kai-Xuan Xie, Jia-Peng He, Qing-Peng Wang, Jian-Min Ma, Shun Yang, Qing-Hong Wang
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Alloy anodes for sodium-ion batteries Rare Met. (IF 2.161) Pub Date : 2020-11-24 Shu-Min Zheng, Yan-Ru Tian, Ya-Xia Liu, Shuang Wang, Chao-Quan Hu, Bao Wang, Kai-Ming Wang
Sodium-ion batteries (SIBs) have emerged as one of the most promising candidates for next-generation energy storage systems because sodium is abundant in nature. The practical application of SIBs critically depends on developing robust electrode materials with high specific capacity and long cycling life, developing suitable anode materials is even more challenging. Alloy-type anodes are attractive
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Microstructure and properties of Al–7Si–0.6Mg alloys with different Ti contents deposited by wire arc additive manufacturing Rare Met. (IF 2.161) Pub Date : 2020-11-19 Cheng-De Li, Hui-Min Gu, Wei Wang, Shuai Wang, Ling-Ling Ren, Yu-Chun Zhai, Zhen-Biao Wang, Zhu Ming
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Fe 3 O 4 @ Angelica sinensis polysaccharide nanoparticles as an ultralow-toxicity contrast agent for magnetic resonance imaging Rare Met. (IF 2.161) Pub Date : 2020-11-18 Kai Wang, Xiao-Guang Xu, Ying-Li Ma, Chun-Rui Sheng, Li-Na Li, Li-Ying Lu, Jian Wang, Yi-Ning Wang, Yong Jiang
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Ultrathin CeO 2 nanosheets as bifunctional sensing materials for humidity and formaldehyde detection Rare Met. (IF 2.161) Pub Date : 2020-11-14 Peng Zhang, Le-Xi Zhang, Heng Xu, Yue Xing, Jing-Jing Chen, Li-Jian Bie
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Recent progress in organic hole-transporting materials with 4-anisylamino-based end caps for efficient perovskite solar cells Rare Met. (IF 2.161) Pub Date : 2020-11-12 Xiao-Peng Xu, Shi-Yang Li, Ying Li, Qiang Peng
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Challenges and strategies for ultrafast aqueous zinc-ion batteries Rare Met. (IF 2.161) Pub Date : 2020-11-09 Qiao-Nan Zhu, Zhen-Ya Wang, Jia-Wei Wang, Xiao-Yu Liu, Dan Yang, Li-Wei Cheng, Meng-Yao Tang, Yu Qin, Hua Wang
With the rising demand for fast-charging technology in electric vehicles and portable devices, significant efforts have been devoted to the development of the high-rate batteries. Among numerous candidates, rechargeable aqueous zinc-ion batteries (ZIBs) are a promising option due to its high theoretical capacity, low redox potential of zinc metal anode and inherent high ionic conductivity of aqueous
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DFT calculation on p-xylene sensing mechanism of (C 4 H 9 NH 3 ) 2 PbI 4 single crystal based on physisorption Rare Met. (IF 2.161) Pub Date : 2020-11-02 Meng-Ya Zhu, Ping He, Xue-Li Yang, Guang-Ze Hui, Cheng-Chun Tang, Guo-Feng Pan, Li-Jian Bie
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Interface characteristic and mechanical performance of TiAl/Ti 2 AlNb diffusion bonding joint with pure Ti interlayer Rare Met. (IF 2.161) Pub Date : 2020-09-02 Lei Zhu, Bin Tang, Ming-Xuan Ding, Yan Liu, Xiao-Fei Chen, Shao-Peng Yan, Jin-Shan Li
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In situ synthesis of Co 3 O 4 nanoparticles confined in 3D nitrogen-doped porous carbon as an efficient bifunctional oxygen electrocatalyst Rare Met. (IF 2.161) Pub Date : 2020-09-14 Zhi-Yuan Wang, Shun-Da Jiang, Chan-Qin Duan, Dan Wang, Shao-Hua Luo, Yan-Guo Liu
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Microstructure, wear and corrosion performance of plasma electrolytic oxidation coatings formed on D16T Al alloy Rare Met. (IF 2.161) Pub Date : 2020-09-14 Wan-Ying Liu, Ying Liu, Carsten Blawert, Mikhail-L. Zheludkevich, Chun-Ling Fan, Mohd Talha, Yuan-Hua Lin
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Enhanced separation of Pd(II) and Pt(IV) from hydrochloric acid aqueous solution using 2-((2-methoxyethyl)thio)-1H-benzimidazole Rare Met. (IF 2.161) Pub Date : 2020-09-03 Shao-Ping Feng, Kun Huang
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Metal organic framework (ZIF-67)-derived Co nanoparticles/N-doped carbon nanotubes composites for electrochemical detecting of tert-butyl hydroquinone Rare Met. (IF 2.161) Pub Date : 2020-08-14 Jing Tang, Sheng-Biao Zheng, Si-Xun Jiang, Jie Li, Teng Guo, Jia-Hao Guo
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In situ growth of NiSe@Co 0.85 Se heterointerface structure with electronic modulation on nickel foam for overall water splitting Rare Met. (IF 2.161) Pub Date : 2020-08-14 Wen-Long Ding, Yan-Hui Cao, Hui Liu, Ao-Xuan Wang, Cui-Juan Zhang, Xue-Rong Zheng
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Microstructures, hardening and tribological behaviors of tin matrix composites reinforced with SiC and Zn particles Rare Met. (IF 2.161) Pub Date : 2020-08-12 Fatemeh Ghasemi, Mohammad Moazami-Goudarzi, Hamidreza Najafi
In order to strengthen pure tin and improve its dry sliding resistance, Sn/SiC and Sn/Zn composites were fabricated via a powder metallurgy route. Microstructure, hardness and pin-on-disk wear resistance of pure tin and the fabricated composites were compared to those of Sn–7.5Sb–3.5Cu Babbitt alloy. The dominant wear mechanism at different applied loads was determined by analyzing worn surfaces and
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A comparison between novel Gd 2 Zr 2 O 7 and Gd 2 Zr 2 O 7 /YSZ thermal barrier coatings fabricated by plasma spray-physical vapor deposition Rare Met. (IF 2.161) Pub Date : 2020-08-11 Ren-Bo Zhu, Jian-Peng Zou, Jie Mao, Zi-Qian Deng, Xiao-Feng Zhang, Chun-Ming Deng, Min Liu
Spherical Gd2Zr2O7 hollow powders with a mean size of 8.8 μm were fabricated as feedstock for thermal barrier coatings (TBCs) by spray-drying. The single-ceramic-layer (SCL) Gd2Zr2O7 TBCs and double-ceramic-layer (DCL) Gd2Zr2O7/YSZ TBCs with quasi-columnar structure were successfully fabricated by plasma spray-physical vapor deposition (PS-PVD). Tensile and water-quenching tests were applied to evaluate
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Equilibrium and mechanism studies of gold(I) extraction from alkaline aurocyanide solution by using fluorine-free ionic liquids Rare Met. (IF 2.161) Pub Date : 2020-08-11 Ya-Ting Wang, Men Liu, Nian Tang, Sheng-Jian Li, Yan Sun, Shi-Xiong Wang, Xiang-Jun Yang
Abstract Solvent extraction based on ionic liquids is generally considered to be an environmentally benign and effective technology for gold(I) recovery. The aim of this work is to study gold(I) extraction from aurocyanide solution using fluorine-free ionic liquids [A336][SCN], [A336][MTBA] and [A336][Mal]. Various factors that affect gold(I) extraction (including concentration of ionic liquids, equilibrium
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Self-assembly synthesis of SnNb 2 O 6 /amino-functionalized graphene nanocomposite as high-rate anode materials for sodium-ion batteries Rare Met. (IF 2.161) Pub Date : 2020-08-08 Min Huang, Ji-Xin Liu, Peng Huang, Hai Hu, Chao Lai
Abstract A two-dimensional (2D) SnNb2O6/amino-functionalized graphene (En-RGO) nanocomposite with a representative 2D–2D architecture has been constructed by an easy self-assembly approach and firstly investigated as anode materials for secondary sodium-ion batteries. The SnNb2O6 nanosheets are evenly anchored with the amino-functionalized graphene through electrostatic attractive interplay between
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Structure and properties of ZrCoCe getter film with Pd protection layer Rare Met. (IF 2.161) Pub Date : 2020-08-06 Jian-Dong Cui, Hua-Ting Wu, Yan Zhang, Yao-Hua Xu, Zhi-Min Yang
Abstract ZrCoCe getter films with thickness of ~ 2.3 μm were deposited on Si(100) wafers by direct current (DC) magnetron sputtering process. A 400-nm-thick Pd protection layer was then deposited on the as-deposited ZrCoCe film without exposure to atmosphere. Microstructure, surface morphology and surface chemical state of the films were analyzed. Moreover, hydrogen sorption properties were determined
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Fabrication of porous Zn 2 TiO 4 –ZnO microtubes and analysis of their acetone gas sensing properties Rare Met. (IF 2.161) Pub Date : 2020-08-06 Xiao-Yan Chen, Xin-Zhen Wang, Feng-Jun Liu, Guo-Song Zhang, Xiao-Jie Song, Jian Tian, Hong-Zhi Cui
Abstract Porous Zn2TiO4–ZnO microtubes have been successfully fabricated using chemical precipitation followed by a calcination process using a carbon fiber template. The porous Zn2TiO4–ZnO microtubes with a diameter of ~ 4 μm consisted of Zn2TiO4 and ZnO nanoparticles. These displayed worm-like pore structures. Carbon fibers played an important role during the porous Zn2TiO4–ZnO microtube formation
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Removal and occurrence state transformation of Ti impurity in Gd metal Rare Met. (IF 2.161) Pub Date : 2020-08-06 Zhen-Fei Yang, Si-Ming Pang, Shi-Hong Yan, Hong-Bo Yang, Xiao-Wei Zhang, Qiong Zhu, De-Hong Chen, Dao-Gao Wu
Abstract The interaction mechanism of B and Ti in liquid Gd metal was theoretically analyzed, and the occurrence state transformation and removal of Ti impurity were experimentally analyzed in this study. The research results indicated that the B additive reacted with the Ti impurity in liquid Gd metal to form the high-melting-point TiB2 at 1673 K. Owing to the low density of TiB2 that is far lower
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Layer-dependent and light-tunable surface potential of two-dimensional indium selenide (InSe) flakes Rare Met. (IF 2.161) Pub Date : 2020-08-05 Yu-Hao Li, Chuang-Bin Yu, Zhi Li, Peng Jiang, Xiao-Yuan Zhou, Cun-Fa Gao, Jiang-Yu Li
Abstract As a fundamental surface property of two-dimensional (2D) materials, surface potential is critical for their emerging electronic applications and essential for van der Waals heterostructure engineering. Here, we report the surface potential of few-layer InSe. The effect of layer count, light intensity and different deposited substrates is considered. Few-layer InSe flakes were exfoliated from
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Microstructure and tensile properties of A356 alloy with different Sc/Zr additions Rare Met. (IF 2.161) Pub Date : 2020-08-05 Shou-Peng Xu, Chun-Sheng Shi, Nai-Qin Zhao, Chun-Nian He
Abstract Addition of rare earth elements for improving the tensile properties of aluminum alloys has attracted great attention. In this study, a systematic analysis on the microstructure and tensile properties of A356–0.13Ti alloys with different contents of scandium (Sc) and scandium/zirconium (Sc/Zr) after solution and aging treatment process was carried out. The addition of Sc/Zr into A356–0.13Ti
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Oxidation behavior of Ni-based superalloy GH738 in static air between 800 and 1000 °C Rare Met. (IF 2.161) Pub Date : 2020-08-05 Jue Wang, Hao Xue, Ying Wang
Abstract The oxidation behavior of a nickel-based superalloy GH738 was studied by isothermal oxidation tests in still air at different temperatures, with exposure time up to 100 h. Oxidation-kinetic curves were plotted using the mass gain method. The surface and cross-sectional morphologies were observed by scanning electron microscopy (SEM). A composition analysis and an oxidation-product identification
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Experimental isothermal section phase diagram of Ho–Fe–In at 773 K and magnetic properties of Ho 12 Fe 2.08 In 2.92 alloy Rare Met. (IF 2.161) Pub Date : 2020-08-05 Xiang Chen, Chao Ni
Abstract The isothermal section of the Ho–Fe–In system at 773 K has been constructed by X-ray powder diffraction. One known structure ternary compound Er12Fe2In3-type Ho12Fe2In3 has been confirmed. At the same time, solid solutions are not detected in Ho–Fe–In system at 773 K. The magnetic transition and magnetocaloric effect of Ho12Fe2.08In2.92 alloy with Er12Fe2In3-type structure were investigated
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Ultrathin porous graphitic carbon nanosheets activated by alkali metal salts for high power density lithium-ion capacitors Rare Met. (IF 2.161) Pub Date : 2020-08-05 Yu-Qing Dai, Guang-Chao Li, Xin-Hai Li, Hua-Jun Guo, Zhi-Xing Wang, Guo-Chun Yan, Jie-Xi Wang
Abstract Graphitic carbons with reasonable pore volume and appropriate graphitization degree can provide efficient Li+/electrolyte-transfer channels and ameliorate the sluggish dynamic behavior of battery-type carbon negative electrode in lithium-ion capacitors (LICs). In this work, onion-like graphitic carbon materials are obtained by using carbon quantum dots as precursors after sintering, and the
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Enhanced positive humidity sensitive behavior of p-reduced graphene oxide decorated with n-WS 2 nanoparticles Rare Met. (IF 2.161) Pub Date : 2020-08-04 Zai-Hua Duan, Qiu-Ni Zhao, Cheng-Zhen Li, Si Wang, Ya-Dong Jiang, Ya-Jie Zhang, Bo-Hao Liu, Hui-Ling Tai
Abstract Most resistance-type humidity sensors exhibit negative humidity sensitivity, i.e., their resistance decreases with a corresponding increase in humidity. This is primarily attributed to the dominant role of ionic conduction in adsorbed water. In this work, a humidity sensor based on a p-type reduced graphene oxide (p-rGO) with positive humidity sensitivity is proposed. Moreover, its positive
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Microstructures and properties of 6016 aluminum alloy with gradient composition Rare Met. (IF 2.161) Pub Date : 2020-08-04 Xiang-Jie Wang, Wei Sun, Jun-Fu Chen, Fu-Yue Wang, Lei Li, Jian-Zhong Cui
Abstract Weight reduction plays an important role in reducing fuel and emissions, and the heat-treatable 6016 aluminum alloy exhibits excellent application prospect in automobile lightweight. In this paper, ingot with constant Mg/Si ratio and decreased Mg and Si contents was obtained. Both the microstructure and the texture of 6016 aluminum alloy plate designed with different alloy compositions at
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Microstructural evolution and numerical simulation of laser-welded Ti 2 AlNb joints under different heat inputs Rare Met. (IF 2.161) Pub Date : 2020-08-04 Ke-Zhao Zhang, Zheng-Long Lei, Yan-Bin Chen, Ke Yang, Ye-Feng Bao
Abstract The influence of heat input on the microstructural evolution of laser-welded Ti2AlNb joints was investigated in this study. The thermal cycles during welding process were analyzed by numerical simulation. In the heat affected zone (HAZ), the amount of α2 and O phases decreased with laser power increasing. During the heating period, α2 → B2 and O → B2 transformations occurred, but the decomposition
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Microstructural evolution and aging behavior of Mg–4.5Y–2.5Nd–1.0Gd–0.5Zr alloys with different Zn additions Rare Met. (IF 2.161) Pub Date : 2020-08-04 Zheng Tian, Qiang Yang, Kai Guan, Zhan-Yi Cao, Jian Meng
Abstract Microstructures and mechanical properties of Mg–4.5Y–2.5Nd–1.0Gd–0.5Zr–xZn (x = 0, 0.5, 1.0, and 1.5; wt%) alloys under as-cast and peak-aged states were investigated in this work. The results indicate that the intermetallic phase components are closely dependent on Zn content. Under as-cast state, the dominant eutectic phase is Mg5RE in the alloys with 0 wt% and 0.5 wt% Zn additions while
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Chemically synthesizing exchange-coupled SmCo 5 /Sm 2 Co 17 nanocomposites Rare Met. (IF 2.161) Pub Date : 2020-08-04 Yao-Hui Xu, Qiang Jiang, Kun Li, Zhen-Hui Ma
Abstract A new strategy to chemically synthesize exchange-coupled SmCo5/Sm2Co17 nanocomposites by in situ decomposition of SmCox (5 < x < 8.5) is reported in this work. Our synthesis starts with the fabrication of Co/Sm2O3 (Sm to Co atomic ratio of Sm/Co = 1:4.2), which can be reduced into 40-nm SmCo5 single crystal nanoparticles by Ca under the protection of CaO, showing a high coercivity of 2.85
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