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  • Study on the Intensification of the Boron-Rich Slag Subsection Cooling Process
    JOM (IF 2.029) Pub Date : 2021-01-22
    Xinchong Wei, Qiuyue Zhao, Xiaolong Li, Ting’an Zhang

    A subsection cooling process is used to selectively precipitate suanite from boron-rich slag, which initially requires a relatively high cooling rate followed by a low cooling rate. The cooling rate and homogeneity affect the crystal growth of the precipitated phase. Different structure intensification approaches, including adding cold slag and applying fins, are effective for improving the reaction

    更新日期:2021-01-24
  • PbSO 4 Reduction Mechanism and Gas Composition at 600–1000°C
    JOM (IF 2.029) Pub Date : 2021-01-20
    Yun Li, Pekka Taskinen, Yuejun Wang, Shenghai Yang, Chaobo Tang, Yongming Chen, Ari Jokilaakso

    A promising lead-containing waste recycling method, with sulfur conservation and reductive sulfur-fixing co-smelting process (RSFCS), is proposed. This work investigated the PbSO4 reduction equilibrium composition, phase conversions, and microscopic transformation mechanisms during the RSFCS process at different temperatures, times, and CO-CO2 mixtures using thermodynamic modeling, thermogravimetric

    更新日期:2021-01-20
  • Extraction of Metals from Scrap Marble Cutting Segments in Nitric Acid Solutions
    JOM (IF 2.029) Pub Date : 2021-01-20
    Oktay Celep, Mürsel Orak, Ersin Y. Yazici, Hacı Deveci

    Extraction of cobalt, copper, and silver from scrap saw-blade segments using nitric acid solutions (0.1–0.4 M, 20–60°C) were investigated using response surface methodology. Extraction of cobalt and iron was more extensive than copper and silver, i.e., 35.7–96.2% Co and 72.6–100% Fe versus 8.50–35.4% Cu and 8.11–22.5% Ag. Statistical analysis of the experimental data has shown that increasing the acid

    更新日期:2021-01-20
  • Preparation of Magnesia from Hydromagnesite Ore by Calcination
    JOM (IF 2.029) Pub Date : 2021-01-20
    Qianqian Wang, Shujuan Dai, Yue Xi

    Hydromagnesite was calcined into light-burned magnesia, and the effects of calcination conditions, such as the size fraction of the ore and calcination temperature, and holding time on the loss on ignition and MgO grade were investigated. The calcination mechanism of hydromagnesite ore was analyzed by characterizing the calcinate with respect to its chemical and physical properties. The results indicate

    更新日期:2021-01-20
  • Thermodynamic Modelling of Molybdenite Roasting in a Multiple-Hearth Furnace
    JOM (IF 2.029) Pub Date : 2021-01-19
    Leonid N. Shekhter, John E. Litz, Nimit M. Shah, Larry F. McHugh

    A thermodynamic model was developed to study the roasting of molybdenite ore into molybdenum trioxide in a multiple-hearth furnace roaster. The model was developed using FactSage™, a software specializing in thermochemical simulations. The model assumes thermodynamic equilibrium between the solid and gaseous phases on each hearth. The results from the model were compared with operational data obtained

    更新日期:2021-01-20
  • Effects of Tin on the Morphological and Electrochemical Properties of Arc-Discharge Nanomaterials
    JOM (IF 2.029) Pub Date : 2021-01-19
    Alexey V. Zaikovskii, Anna A. Iurchenkova, Dmitriy V. Kozlachkov, Ekaterina O. Fedorovskaya

    Electric arc synthesis enables the fabrication of materials in the form of metal nanoparticles packed into a carbon matrix, which separates the nanoparticles, preventing them from contacting each other, merging, coagulating, or contacting possible reactive environments, thereby stabilizing the nanoparticles. This paper presents the results of studies of the effect of tin on the structure of a composite

    更新日期:2021-01-20
  • Nonlinear Thermo-Mechanical Full Coupling of Aluminum Oxide Particles Transport in Electrolytic Bath Using Lattice Boltzmann Method
    JOM (IF 2.029) Pub Date : 2021-01-19
    Mouhamadou A. Diop, Zhongning Shi, Mario Fafard

    A three-dimensional numerical model has been developed to quantify the predominant phenomena roles on dynamics alumina particles between an electrolytic bath and the vicinity of gas bubbles. At the particle scale, the bath, regarded as turbulent flow, was modeled by a steady plane shear flow and solved using a lattice Boltzmann method. The coupling between the fluid and particle phases is carried out

    更新日期:2021-01-20
  • Thermodynamics and Reduction of Bi 2 O 3 in Waste Tire-Derived Atmosphere
    JOM (IF 2.029) Pub Date : 2021-01-19
    M. Cumbul Altay, S. Eroglu

    The present study aimed to investigate reduction behavior of Bi2O3 in the gaseous atmosphere generated by the pyrolysis of waste tires. Thermodynamic analysis carried out in the Bi-O-C-H-S-Ar system predicted that Bi2O3 could be reduced to Bi in the temperature range 700–900 K. Bi2O3 reduction experiments were carried out as a function of reactant mass ratio (\( m_{\text{tire}} /m_{{{\text{Bi}}_{ 2}

    更新日期:2021-01-20
  • Effect of Mn Addition on Melt Purification and Fe Tolerance in Mg Alloys
    JOM (IF 2.029) Pub Date : 2021-01-19
    Tao Chen, Yuan Yuan, Tingting Liu, Dajian Li, Aitao Tang, Xianhua Chen, Rainer Schmid-Fetzer, Fusheng Pan

    Two methods for impeding the detrimental impact of iron (Fe) impurity in magnesium (Mg) alloys on the corrosion properties are studied: the addition of manganese (Mn) and the selection of melting temperature. Experimental work was carried out on Mg and AZ91 alloys with selected additions of Mn and selected settling temperatures. The settling velocity was evaluated using the Stokes equation. Extensive

    更新日期:2021-01-20
  • Slag Activation in the Carbothermic Reduction of Phosphorite with Adding Micronutrient-Bearing Cosolvents
    JOM (IF 2.029) Pub Date : 2021-01-19
    Hongquan Jing, Cuihong Hou, Haobin Wang, Yuan Yao, Bingbing Liu

    High smelting temperature of phosphate ore and low activity of the slag lead to energy-extensive consumption and large solid waste generation in the yellow phosphorus industry. Micronutrient-bearing cosolvents were added to the reduction smelting process of phosphate ore to reduce the smelting temperature and increase the activity of slag in the current work. Thermodynamic analysis demonstrated that

    更新日期:2021-01-20
  • Precipitation Behavior of Carbide and its Effect on the Mechanical Properties of a Novel Fe 60 Co 10 Cr 10 Ni 10 Mo 5 V 5 Medium-Entropy Alloy
    JOM (IF 2.029) Pub Date : 2021-01-16
    Hebin Wang, Da Hong, Longgang Hou, Ping Ou, Li Shen, Yiqi Wang, Zhigang Wang, Hongjin Zhao

    Carbide precipitates are effective for improving the strength and stability of high-entropy alloys. In this work, novel-designed Fe60Co10Cr10Ni10Mo5V5 medium-entropy alloys (MEAs) containing 1 wt.% carbon were prepared by vacuum arc melting followed by solid solution treatment and aging. The effects of aging on the microstructure and mechanical properties of the MEAs were investigated. The results

    更新日期:2021-01-18
  • Fe Thin Film-Coated Optics for Corrosion Monitoring: Optical and Electrochemical Studies
    JOM (IF 2.029) Pub Date : 2021-01-15
    Ruishu F. Wright, Rachel English, James C. Egbu, John Baltrus, Margaret Ziomek-Moroz, Paul R. Ohodnicki

    Corrosion proxy materials integrated with an optical sensing platform enable a real-time optical corrosion sensor for natural gas pipelines to prevent methane leaks and catastrophic events. Effects of CO2, pH, and film thickness on corrosion of Fe thin films (25 nm, 50 nm, 100 nm) were studied using optical and electrochemical methods in 3.5 wt.% NaCl solutions at 30°C. An increase in light transmission

    更新日期:2021-01-15
  • Gold Solubility in CaO-SiO 2 -Al 2 O 3 -Fe 2 O 3 Slags
    JOM (IF 2.029) Pub Date : 2021-01-15
    Jun Gil Yang, Joo Ho Park, Ji Yeon Kang, Hyun Sik Park, Joo Hyun Park

    Gold solubility in the CaO-SiO2-Al2O3-Fe2O3 slag system was measured at 1723 K under an oxidizing atmosphere. Gold solubility in the present slag system increased with increasing slag basicity, which was quantified by the Vee ratio (= CaO/SiO2), theoretical optical basicity, and activity of CaO. However, the effect of Fe2O3 and Al2O3 on gold solubility was negligible. From the thermodynamic assessment

    更新日期:2021-01-15
  • Evaluation and Modeling of Scrap Utilization in the Steelmaking Process
    JOM (IF 2.029) Pub Date : 2021-01-13
    Ming Gao, Jin Tao Gao, Yan Ling Zhang, Shu Feng Yang

    The study of scrap melting provides data for increasing the scrap utilization rate. Here, an evaluation model is established to analyze the effect of each factor on scrap melting using statistical methods for the first time. Subsequently, the quantitative relationship between the influencing factors and melting parameters is obtained. Back propagation (BP) neural networks and multiple regression are

    更新日期:2021-01-13
  • Leaching of Antimony from Stibnite Ore in KOH Solution for Sodium Pyroantimonate Production: Systematic Optimization and Kinetic Study
    JOM (IF 2.029) Pub Date : 2021-01-13
    Mahdi Zekavat, Hossein Yoozbashizadeh, Azin Khodaei

    This work aims to shed light on the leaching kinetics of antimony from stibnite ore in potassium hydroxide (KOH) solution. Response surface methodology based on central composite design was used to investigate the effect of time, temperature, solid to liquid ratio (S/L), and KOH concentration as independent parameters on the leaching efficiency of antimony. According to the results, time shows the

    更新日期:2021-01-13
  • Comparison of Biomass and Coal in the Recovery Process of silicon in an Electric Arc Furnace
    JOM (IF 2.029) Pub Date : 2021-01-12
    Hossein Hasannezhad, Amirhossein Meysami

    Silicon recovery of silica ore (\( {\text{SiO}}_{2} \)) has been studied with two types of carbon materials, charcoal as a biomass and coal as a fossil fuel, at elevated temperatures between 1800 and 2000°C in an electric arc furnace. The effects of porosity and electrical resistance of the carbon materials were investigated. To this end, recovery of silicon and ferrosilicon production were tested

    更新日期:2021-01-13
  • Observation of Fundamental Mechanisms in Compression-Induced Phase Transformations Using Ultrafast X-ray Diffraction
    JOM (IF 2.029) Pub Date : 2021-01-12
    Michael R. Armstrong, Harry B. Radousky, Ryan A. Austin, Elissaios Stavrou, Hongxiang Zong, Graeme J. Ackland, Shaughnessy Brown, Jonathan C. Crowhurst, Arianna E. Gleason, Eduardo Granados, Paulius Grivickas, Nicholas Holtgrewe, Hae Ja Lee, Tian T. Li, Sergey Lobanov, Joseph T. McKeown, Bob Nagler, Inhyuk Nam, Art J. Nelson, Vitali Prakapenka, Clemens Prescher, John D. Roehling, Nick E. Teslich, Peter

    As theoretically hypothesized for several decades in group IV transition metals, we have discovered a dynamically stabilized body-centered cubic (bcc) intermediate state in Zr under uniaxial loading at sub-nanosecond timescales. Under ultrafast shock wave compression, rather than the transformation from α-Zr to the more disordered hex-3 equilibrium ω-Zr phase, in its place we find the formation of

    更新日期:2021-01-12
  • Investigation of Microwave and Thermal Processing of Electrode Material of End-of-Life Ni-MH Battery
    JOM (IF 2.029) Pub Date : 2021-01-11
    Shaila Mir, Neha Shukla, Nikhil Dhawan

    Ni-metal hydride (NiMH) batteries should be recycled, as they contain base metals (Ni, Co) and rare earth elements (La, Ce). In this study, thermal and microwave treatments are investigated as a pre-treatment method for decomposing electrode material (Ni(OH)2 and LaNi5). The kinetic analysis of thermal decomposition electrode material yields the activation energy of 41.3 kJ/mol. The maximum percentage

    更新日期:2021-01-12
  • Thermodynamics and Synthesis of Cu Powder from CuO in Waste Tire-Derived Pyrolytic Gas Atmosphere
    JOM (IF 2.029) Pub Date : 2021-01-08
    M. Cumbul Altay, S. Eroglu

    The present study aimed to investigate the reduction behavior of CuO particles under the gaseous atmosphere generated by waste tire pyrolysis. Thermodynamics of the reduction process indicated that CuO could be reduced to the metal via the tire (rubber) pyrolysis route in the temperature range 700–900 K. Oxide reduction experiments were conducted as a function of the reactant mass ratio (mtire/mCuO)

    更新日期:2021-01-08
  • Textured Polymer Surfaces Mimicking the Tactile Friction Between Wood and Skin
    JOM (IF 2.029) Pub Date : 2021-01-04
    Li Zhang, Adriana Carolina Rodríguez Urribarrí, Haihang Wang, Sheng Zhang, Yuan Zhang, Xiangqiong Zeng, Emile van der Heide

    Polymer-based furniture with wood-like visual printing is widely used in domestic and office applications. Although polymers could fulfil the high quality requirements of strength and appearance, they cannot mimic the feel of wood during touch. In this study, polymers with textured surfaces were designed to mimic the tactile friction and naturalness of wood. The influence of a series of factors on

    更新日期:2021-01-05
  • Low-Temperature Molten Salt Synthesis and Characterization of Nanowire-Like TaB 2 Powder
    JOM (IF 2.029) Pub Date : 2021-01-04
    Liaqat Ali Shah

    TaB2 nanopowder has been prepared by the molten salt synthesis (MSS) technique. Nanowire-like TaB2 nanopowder was successfully synthesized by reacting in the Ta2O5–MgB2 system using KCl/NaCl as reaction media. The impact of the firing temperature (800°C to 1000°C), firing time (1 h to 4 h), and ratio of reactants to salt (1:0, 1:2, 1:5, and 1:10) on the preparation of the TaB2 nanopowder was examined

    更新日期:2021-01-05
  • Production Strategy for Manufacturing Large-Scale AlSi10Mg Components by Laser Powder Bed Fusion
    JOM (IF 2.029) Pub Date : 2021-01-04
    Federico Bosio, Haopeng Shen, Yang Liu, Mariangela Lombardi, Paul Rometsch, Xinhua Wu, Yuman Zhu, Aijun Huang

    The long production time required for large-scale parts fabricated by laser powder bed fusion (LPBF) tends to induce cracks, distortions, and overheating problems. In this work, to address these challenges, we explored and established a suitable strategy for producing large AlSi10Mg components. The platform temperatures to prevent cracks and distortions were firstly determined. Then, the in situ aging

    更新日期:2021-01-05
  • Recovery of Indium from Hard Zinc Slag by Pressure Leaching and Solvent Extraction
    JOM (IF 2.029) Pub Date : 2021-01-04
    Zhigan Deng, Xingbin Li, Chang Wei, Gang Fan, Minting Li, Cunxiong Li

    In this study, hydrometallurgical processes involving pressure acid leaching and solvent extraction were developed to aid recovery of indium from zinc slag, which is produced in the imperial smelting process. Four different acid leaching methods were studied, namely atmospheric leaching, atmospheric leaching with KMnO4, roasting-atmospheric leaching, and oxygen pressure leaching in a sulfuric acid

    更新日期:2021-01-05
  • Investigations on Positive (Sm 3+ ) and Negative (Ho 3+ ) Association Energy Ion Co-doped Cerium Oxide Solid Electrolytes for IT-SOFC Applications
    JOM (IF 2.029) Pub Date : 2021-01-04
    Ayyanathan Kalpana Devi, Gurusamy Ram kumar, Chaturvedi Prerna, Kanagaraj Amarsingh Bhabu, Choi Daniel, Venkatachalam Sabarinathan, Thanjavur Renganathan Rajasekaran

    Novel compositions of positive (Sm3+) and negative (Ho3+) association energy ion co-doped cerium oxide solid electrolytes were synthesized and analyzed for intermediate-temperature solid oxide fuel cell (IT-SOFC) applications. Powder x-ray diffraction (XRD) and Raman studies confirmed the phase of pure cubic fluorite structure, while densely packed porous-structured morphology was affirmed with high-resolution

    更新日期:2021-01-05
  • Quench Sensitivity of 7475 Aluminum Alloy Using End-Quenching Technique and TTP Diagrams
    JOM (IF 2.029) Pub Date : 2021-01-04
    Lianghua Lin, Haijian Peng, Juangang Zhao

    The quench sensitivity of 7475 aluminum alloy has been comprehensively investigated by hardness testing, electrical conductivity measurements, scanning electron microscopy, and transmission electron microscopy. Based on the end-quenching method and time–temperature–property (TTP) diagram, the key factors affecting the quenching of the studied alloy were identified and are discussed in comparison with

    更新日期:2021-01-05
  • Peculiarities of Intermetallic Phase Formation in the Process of a Solid State Reaction in (Al/Cu) n Multilayer Thin Films
    JOM (IF 2.029) Pub Date : 2021-01-04
    Evgeny T. Moiseenko, Sergey M. Zharkov, Roman R. Altunin, Oleg V. Belousov, Leonid A. Solovyov, Vladimir V. Yumashev, Mikhail N. Volochaev, Galina M. Zeer

    Phase formation in a solid state reaction in Al/Cu bilayer and multilayer thin films was studied by the methods of in situ transmission electron microscopy, electron diffraction, simultaneous thermal analysis and x-ray diffraction. It was established that the phase formation sequences in the (Al/Cu)n (n = 2, 15) multilayer thin films (θ-Al2Cu → γ1-Al4Cu9 → η2-AlCu) and Al/Cu bilayer thin films (θ-

    更新日期:2021-01-05
  • Shedding Light on the Effect of Diethyl Ether Antisolvent on the Growth of (CH 3 NH 3 ) PbI 3 Thin Films
    JOM (IF 2.029) Pub Date : 2021-01-02
    Amal Bouich, Bernabé Mari, Lahoucine Atourki, Shafi Ullah, Mohamed Ebn Touhami

    Antisolvent behavior is one of the most important treatments for producing high-quality perovskite MaPbI3 thin films. However, the optimization of the amount of antisolvent used has not been analyzed on a uniform platform. In this work, a systematic study is employed to quantitively evaluate the impact of anti-solvent treatment on the morphological, structural, and optoelectronic characteristics of

    更新日期:2021-01-02
  • Reactive Bilayers by Self-activated Electroless Nickel-Phosphorous Deposition on Pure Aluminum
    JOM (IF 2.029) Pub Date : 2021-01-02
    Meghna Narayanan, Allakonda Harsha, Anirban Chakraborty, Parasuraman Swaminathan

    Nickel-aluminum bilayers and multilayers are commonly used in reactive systems because of their high heat of mixing. Traditionally, the layers are sputter deposited, an expensive and time-consuming process. In this article, a chemical reduction technique, electroless nickel-phosphorous (EN) deposition, is used for formation of the Ni-Al bilayer using a pure Al substrate. Traditionally, EN deposition

    更新日期:2021-01-02
  • Ultrasound-Assisted Leaching of Iron from Silicon Diamond-Wire Saw Cutting Waste
    JOM (IF 2.029) Pub Date : 2021-01-02
    Jian Kong, Pengfei Xing, Donghui Wei, Xing Jin, Yanxin Zhuang

    Iron removal from silicon powder waste by ultrasound-assisted leaching has been investigated and the leaching conditions optimized to an ultrasonic frequency of 80 kHz, ultrasonic power of 270 W, temperature of 60°C, and sulfuric acid concentration of 12%, achieving an iron removal fraction of 95.24%. The maximum iron removal fraction was obtained after 80 min of leaching without ultrasound, whereas

    更新日期:2021-01-02
  • Structural Characteristics of CaO-SiO 2 -Al 2 O 3 -FeO Slag with Various FeO Contents Based on Molecular Dynamics Simulations
    JOM (IF 2.029) Pub Date : 2021-01-02
    Shufang Ma, Kejiang Li, Jianliang Zhang, Chunhe Jiang, Minmin Sun, Hongtao Li, Ziming Wang, Zhisheng Bi

    Molecular dynamics simulations are used to theoretically calculate the structure and properties of the CaO-SiO2-Al2O3-FeO quaternary slag system with the aim of understanding the influence of the FeO content on the slag structure and properties. The radial distribution function, coordination number, diffusion coefficient, etc. are used to characterize the structural characteristics of the slag. Viscosity

    更新日期:2021-01-02
  • Electrochemical Decomposition of CO 2 in a Fluoride Melt
    JOM (IF 2.029) Pub Date : 2021-01-02
    Fengguo Liu, Aimin Liu, Xianwei Hu, Zhaowen Wang, Zhongning Shi

    The conversion of CO2 into carbon materials and oxygen gas has great significance for reducing the greenhouse gas concentrations of Earth and realizing in situ utilization of Mars’ atmosphere. In this work, LiF-Li2O melts containing CO2 were electrolyzed using a Ni cathode and Pt anode at 850°C. Carbon materials with different morphologies were deposited on the cathode and oxygen evolution was detected

    更新日期:2021-01-02
  • Reliability of Cu Nanoparticles/Bi-Sn Solder Hybrid Bonding Under Cyclic Thermal Stresses
    JOM (IF 2.029) Pub Date : 2021-01-02
    Masanori Usui, Toshikazu Satoh, Michiaki Kamiyama, Hidehiko Kimura

    The influence of thermal cycle stress loading on hybrid bonding, which was formed by sintering a mixture of Cu nanoparticles and a eutectic Bi-Sn solder powder, has been investigated. A Si chip and a directly bonded aluminum (DBA) substrate were bonded using the hybrid bonding layer. The bonded sample was evaluated using a thermal cycle test (− 40°C and 250°C). The degradation process of the sample

    更新日期:2021-01-02
  • Effect of Al on Corrosion Behavior of Imitation-Gold Cu-Zn-Ni-Sn Alloys in 3.5 wt.% NaCl solution
    JOM (IF 2.029) Pub Date : 2021-01-02
    Xiangyu Yu, Zhu Xiao, Qian Yu, Zhou Li, Qian Lei, Jie Dai

    The corrosion behavior of imitation-gold Cu-Zn-Ni-Sn alloys with and without Al was investigated by means of color difference testing, static corrosion measurements, scanning electron microscopy analysis, electrochemical impedance measurements, and x-ray photoelectron spectroscopy analysis. The results showed that aluminum inhibited dissolution of Zn and Sn by the formation of an oxide film on the

    更新日期:2021-01-02
  • An Investigation of Spray Deposited CdO Films and CdO/p-Si Heterojunction at Different Substrate Temperatures
    JOM (IF 2.029) Pub Date : 2021-01-02
    G. Turgut, S. Aydogan, M. Yilmaz, A. Özmen, H. Kacus

    In this study, CdO films were successfully obtained by using a homemade chemical spray pyrolysis technique. The crystal structures of the CdO thin films improved due to an increase in the substrate temperature when the spray time was kept constant. Additionally, CdO film deposited at 250°C exhibited amorphous crystal structure. The surface morphology of the samples was evaluated by scanning electron

    更新日期:2021-01-02
  • Influence of Bonding Temperature on Interfacial Microstructure and Properties of Hypereutectic Al-Si Joints with Cu Interlayer
    JOM (IF 2.029) Pub Date : 2021-01-02
    Haibo Wang, Hongsheng Chen, Qingzhu Sun, Benju Wang, Cheng Yang

    Hypereutectic Al-27Si and Al-50Si alloys have been bonded and the influence of the bonding temperature on the microstructure and properties of the joints investigated. The results showed that Al-27Si/Al-50Si joints were bonded metallurgically with wide soldering seams containing α-Al, β-Si, and θ-Al2Cu eutectic phases. The amount of θ-Al2Cu eutectic phase gradually decreased and the bonding interface

    更新日期:2021-01-02
  • A Study of Selenium and Tellurium Distribution Behavior, Taking the Copper Matte Flash Converting Process as the Background
    JOM (IF 2.029) Pub Date : 2021-01-02
    Feng Yu, Zhihong Liu, Fengchun Ye, Longgong Xia, Ari Jokilaakso

    Single particle experiments were carried out in the present study. An industrial copper matte powder, containing 68.04 wt.% Cu, 0.50 wt.% Se and 0.08 wt.% Te was taken as the starting material. Se and Te phase assemblies and distribution behaviors were systematically investigated in the air atmosphere. It was found that Se reported to blister copper, matte, and oxide phase, whilst Te will enrich in

    更新日期:2021-01-02
  • Removal of Phosphorus from Si-Fe Alloy by CaO-Al 2 O 3 -SiO 2 -Na 2 O Slag Refining
    JOM (IF 2.029) Pub Date : 2021-01-02
    Golam Ismot Ara Taposhe, Leili Tafaghodi Khajavi

    A combination of slag and solvent refining methods was used to remove phosphorus from silicon. The CaO-Al2O3-SiO2-Na2O quaternary system was selected as the slag to eliminate phosphorus from Si-20 wt.% Fe alloy at 1300°C. The partition ratio of phosphorus (LP) at various slag compositions was obtained to investigate the effect of basicity (CaO/SiO2), oxygen potential (SiO2/Al2O3) and Na2O content of

    更新日期:2021-01-02
  • Deformation Behavior, Structure, and Properties of an Aging Ti-Ni Shape Memory Alloy after Compression Deformation in a Wide Temperature Range
    JOM (IF 2.029) Pub Date : 2021-01-02
    Victor Komarov, Irina Khmelevskaya, Roman Karelin, Rudolf Kawalla, Grzegorz Korpala, Ulrich Prahl, Vladimir Yusupov, Sergey Prokoshkin

    The deformation behavior, microstructure, phase composition, and mechanical and functional properties of Ti-50.9 at.%Ni shape memory alloy during uniaxial compression in the temperature range from 25°C to 1000°C have been analyzed and are discussed herein. It was found that the deformation temperature of 300°C marked a boundary for the transition from the low- to high-temperature type of flow curves;

    更新日期:2021-01-02
  • Investigation of Solid-State Carbothermal Reduction of Fayalite with and Without Added Metallic Iron
    JOM (IF 2.029) Pub Date : 2021-01-02
    Hongyang Wang, Leiting Shen, Huanjun Bao, Wentao Zhang, Xuan Zhang, Liqun Luo, Shaoxian Song

    Copper slag (CS) with Fe-bearing fayalite and magnetite is the main waste generated during the pyrometallurgical processing of metallic copper. In this paper, the solid-state reduction kinetics of fayalite with and without addition of 10 wt.% metallic iron were studied using the isothermal method. The phase transformation of fayalite was verified by x-ray diffraction, scanning electron microscopy,

    更新日期:2021-01-02
  • Radial Distribution Function Analysis and Molecular Simulation of Graphene Nanoplatelets Obtained by Mechanical Ball Milling
    JOM (IF 2.029) Pub Date : 2021-01-02
    M. R. Pagnola, F. Morales, P. Tancredi, L. M. Socolovsky

    Graphene nanoplatelets have been synthesized by ball milling of synthetic graphite and its structural features studied by x-ray analysis using Mo Kα radiation followed by the proposal of a possible molecular arrangement using AVOGADRO® software. Additional characterization using complementary techniques was also performed. The radial and total distribution functions of the coordination number, as well

    更新日期:2021-01-02
  • Effective Recovery Process of Copper from Waste Printed Circuit Boards Utilizing Recycling of Leachate
    JOM (IF 2.029) Pub Date : 2020-12-21
    Joona Rajahalme, Siiri Perämäki, Roshan Budhathoki, Ari Väisänen

    This study presents an optimized leaching and electrowinning process for the recovery of copper from waste printed circuit boards including studies of chemical consumption and recirculation of leachate. Optimization of leaching was performed using response surface methodology in diluted sulfuric acid and hydrogen peroxide media. Optimum leaching conditions for copper were found by using 3.6 mol L−1

    更新日期:2020-12-21
  • Enhanced Nanostructured ZnO-Based Photocatalyst Immobilized by Ink-Jet Printing for Methylene Blue Degradation
    JOM (IF 2.029) Pub Date : 2020-12-18
    Liwen Huang, Fangyuan Chen, Sara Paydar, Yan Wu

    Exploring facile fabrication methods for stable, ordered-structure photocatalysts with high performance is critical to realize their practical applications. In this work, a ZnO-based photocatalyst was deposited using a solution-processing ink-jet printing technique. Novel water-based inks were developed with pure ZnO and Mg-doped ZnO nanoparticles, which were synthesized by the polyacrylamide gel method

    更新日期:2020-12-18
  • The Effect of Ni-Doped ZnO NPs on the Antibacterial Activity and Degradation Rate of Polyacrylic Acid-Modified Starch Nanocomposite
    JOM (IF 2.029) Pub Date : 2020-12-18
    Shahid Iqbal, Sohail Nadeem, Ali Bahadur, Mohsin Javed, Zahoor Ahmad, Mirza Nadeem Ahmad, Muhammad Shoaib, Guocong Liu, Ayesha Mohyuddin, Muhammad Raheel

    Acrylic acid-modified starch has been achieved by grafting the starch with an acrylic acid homopolymer by using the biodegradable nonionic surfactant Lutensol-XL-100 (decaoxyethyele n-decyl ether) and ammonium persulfate as a free radical originator. After obtaining the optimized starch-based plastic thin film, a nanocomposite (NC) was created by incorporating nickel-doped zinc oxide nanoparticles

    更新日期:2020-12-18
  • Study of Powder Gas Entrapment and Its Effects on Porosity in 17-4 PH Stainless Steel Parts Fabricated in Laser Powder Bed Fusion
    JOM (IF 2.029) Pub Date : 2020-12-18
    Ziheng Wu, Debomita Basu, John L. L. Meyer, Elizabeth Larson, Robin Kuo, Jack Beuth, Anthony Rollett

    Powder-entrapped gas, which can occur naturally in gas-atomized powder, can induce porosity in parts fabricated with powder-based metal additive manufacturing processes. This study utilized synchrotron-based x-ray computed tomography and an in situ high-speed imaging technique, dynamic x-ray radiography (DXR), to investigate the formation of powder-induced porosity using 17-4 PH stainless steel powders

    更新日期:2020-12-18
  • Finite Element Analysis and Techno-economic Modeling of Solar Silicon Molten Salt Electrolysis
    JOM (IF 2.029) Pub Date : 2020-12-18
    Aditya Moudgal, Sarat Buasai, Yi Jie Wu, Alexander McMahon, Jacob M. Hazerjian, Vicky Luu, Ariana Ly, Mohammad Asadikiya, Adam Powell, Uday Pal, Yu Zhong

    A new process is presented for low-cost one-step production of pure solid silicon from natural quartzite by molten salt electrolysis. At a process temperature of 1100°C, a techno-economic model including detailed mass and energy balances estimates energy consumption below 15 kWh/kg, with operating cost of $1.74/kg and capital cost around $10,500 per t/a (tonne annually) of production capacity for a

    更新日期:2020-12-18
  • Effects of Sn Doping on Properties of Multilayered ZnO Films Deposited by Spin Coating/Sol–Gel Method
    JOM (IF 2.029) Pub Date : 2020-12-02
    Naoual Al Armouzi, Mohamed Manoua, Ghizlan El Hallani, Hikmat S. Hilal, Ahmed Liba, Nourreeddine Kouider, Mustapha Mabrouki

    The effects of the Sn doping density and multilayer deposition on the structural, optical, and electrical properties of ZnO films prepared by a spin coating/sol–gel method have been investigated. The film characteristics were studied using x-ray diffraction (XRD) analysis, electronic absorption (ultraviolet–visible) spectroscopy, atomic force microscopy, and measurements using the four-probe method

    更新日期:2020-12-02
  • Microstructure Generation via Generative Adversarial Network for Heterogeneous, Topologically Complex 3D Materials
    JOM (IF 2.029) Pub Date : 2020-12-02
    Tim Hsu, William K. Epting, Hokon Kim, Harry W. Abernathy, Gregory A. Hackett, Anthony D. Rollett, Paul A. Salvador, Elizabeth A. Holm

    Using a large-scale, experimentally captured 3D microstructure data set, we implement the generative adversarial network (GAN) framework to learn and generate 3D microstructures of solid oxide fuel cell electrodes. The generated microstructures are visually, statistically, and topologically realistic, with distributions of microstructural parameters, including volume fraction, particle size, surface

    更新日期:2020-12-02
  • Zinc Oxide in Photocatalytic Removal of Staphylococcus aureus and Klebsiella pneumoniae from Water with Ultraviolet and Visible Solar Radiations
    JOM (IF 2.029) Pub Date : 2020-12-01
    Ahed H. Zyoud, Majdi Dwikat, Sawsan Anabtawi, Raed Alkowni, Naser Qamhieh, Abdulrazack Hajamohideen, Shaher H. Zyoud, Muath H. S. Helal, Samer H. Zyoud, Heba Nassar, Hikmat S. Hilal

    Bacterial deactivation by cell-wall rupturing is widely described. Complete mineralization of both aqueous gram-positive Staphylococcus aureus and gram-negative Klebsiella pneumoniae, leaving no organic species, is described here for the first time. Solar-simulated radiation (with ~ 5% UV), with ZnO nanoparticle photocatalyst, is used. In addition to complete bacterial deactivation (~ 100%), their

    更新日期:2020-12-01
  • Two-Phase Synthesis in n -Hexane–Water, Characterization, and Photocatalytic Activity of ZnO/Bi 2 Sn 2 O 7 Nanocomposite
    JOM (IF 2.029) Pub Date : 2020-12-01
    Yoki Yulizar, Dewangga Oky Bagus Apriandanu, Fadel Lukman Hakim

    The synthesis, characterization, and photocatalytic activity of ZnO/Bi2Sn2O7 nanocomposite are reported herein. ZnO/Bi2Sn2O7 was synthesized using a green high-speed stirring (HSS)-assisted method in the n-hexane–water system using Cassia alata leaf extract (CLE). ZnO/Bi2Sn2O7 nanocomposite formed at the interface between n-hexane and water owing to the essential role of CLE secondary metabolites.

    更新日期:2020-12-01
  • Spray-Deposited Coral-Like ZnO Micro/Nano Thin Films on Glass Substrates
    JOM (IF 2.029) Pub Date : 2020-11-30
    Shadia J. Ikhmayies

    In this work, coral-like micro/nano zinc oxide (ZnO) thin films are synthesized onto glass substrates using the low-cost spray pyrolysis (SP) method without using a metal catalyst or surfactant. The films are prepared at substrate temperature Ts = 350 ± 3°C, using oxygen as the carrier gas. The structure, surface morphology, composition, and optical properties of the as-deposited thin films are characterized

    更新日期:2020-12-01
  • Thermodynamic Assessment of Liquid Fe-Ni-C Alloy Using Modified Quasichemical Model
    JOM (IF 2.029) Pub Date : 2020-11-25
    Min-Kyu Paek, Junmo Jeon, Manas Paliwal, Arijit Biswas, Daniel Lindberg, Jong-Jin Pak

    The liquid solution properties in the Fe-Ni and Fe-Ni-C systems have been thermodynamically assessed using the modified quasichemical model in the pair approximation. The asymmetry of the Fe-Ni and Fe-Ni-C alloy melts was verified by measuring the melting points of Fe-Ni binary alloys on the Ni-rich side, and the C solubility limit in Fe-Ni melt over the entire concentration range at 1500°C and 1600°C

    更新日期:2020-11-25
  • Cyrtrandroemia nicobarica -Synthesized ZnO NRs: A New Tool in Cancer Treatment
    JOM (IF 2.029) Pub Date : 2020-11-24
    Kattakgoundar Govindaraj Sudha, Saheb Ali, Gopalu Karunakaran, Mariyappan Kowsalya, Evgeny Kolesnikov, Mikhail V. Gorshenkov, Mohan Prasanna Rajeshkumar

    There has been a developing interest in the green-mediated synthesis of metal nanorods (NRs), especially from plants. However, there is no published report on the synthesis of ZnO NRs prepared via Cyrtrandroemia nicobarica leaf extract. The formation of ZnO NRs was confirmed by using x-ray diffraction, a Fourier transform infrared spectrometer, Brunauer–Emmett–Teller analysis, scanning electron mi

    更新日期:2020-11-25
  • Electronic and Optical Properties of Al, Eu Single-Doped and Al-Eu Co-Doped ZnO
    JOM (IF 2.029) Pub Date : 2020-11-24
    Zhengguang Guo, Shouhong Chen, Ping Yang

    The geometric structure, energy band structure, electronic state density and optical properties of undoped, Al single-doped, Eu single-doped and Al-Eu co-doped ZnO were systematically investigated by using first principles. From the analysis of the results before and after doping, it is found that the conduction band of the doped system moves to the low energy direction, and the Fermi level enters

    更新日期:2020-11-25
  • A Review of Slag Refining of Crude Silicon
    JOM (IF 2.029) Pub Date : 2020-11-23
    Sridevi Thomas, Liuqing Huang, Mansoor Barati

    Metallurgical refining of crude silicon for low-cost, mass production of solar silicon has been studied extensively over the past two decades. One of the methods attempted to target the deleterious impurities of Si is slag refining, where liquid Si or its alloys are treated with a flux. This article presents an overview of the impurity response to various slag treatment conditions for crude Si metal

    更新日期:2020-11-25
  • Electrical and Optical Properties of Well-Aligned Ho 3+ -Doped ZnO Nanorods as an Alternative Transparent Conducting Oxide
    JOM (IF 2.029) Pub Date : 2020-11-20
    Hakan Çolak, Ercan Karaköse

    In this study, the impacts of doping concentration on the crystal structure, morphology, electrical, and optical properties of Ho3+-doped zinc oxide (ZnO) nanorod (NR) arrays were studied. Structural and morphological characterizations showed that the Ho3+-doped ZnO NRs were crystallized in the (002) direction, and that they had a homogeneous distribution on the substrate. The crystallite sizes of

    更新日期:2020-11-21
  • Solving Stochastic Inverse Problems for Property–Structure Linkages Using Data-Consistent Inversion and Machine Learning
    JOM (IF 2.029) Pub Date : 2020-11-20
    Anh Tran, Tim Wildey

    Determining process–structure–property linkages is one of the key objectives in material science, and uncertainty quantification plays a critical role in understanding both process–structure and structure–property linkages. In this work, we seek to learn a distribution of microstructure parameters that are consistent in the sense that the forward propagation of this distribution through a crystal plasticity

    更新日期:2020-11-21
  • Adsorption–Desorption of La 3+ , Eu 3+ , and Y 3+ by Mg(OH) 2 -Pretreated TP207 Resin
    JOM (IF 2.029) Pub Date : 2020-11-19
    Fei Niu, Ziyu Xie, Chunyan Fu, Haibo Xu, Donghui Liu, Xiaolin Zhang, Youming Yang, Leiting Shen

    The adsorption–desorption behavior of La3+, Eu3+, and Y3+ by Mg(OH)2-pretreated TP207 resin in sulfate solution has been investigated. The effects of the reaction duration, pH value, flow rate, and adsorption mechanism were studied in detail. The results show that the highest adsorption capacity is obtained at solution pH of 4.0. The adsorption affinity of the resin for the different rare-earth ions

    更新日期:2020-11-21
  • In-situ Observations of Directed Energy Deposition Additive Manufacturing Using High-Speed X-ray Imaging
    JOM (IF 2.029) Pub Date : 2020-11-19
    Sarah J. Wolff, Samantha Webster, Niranjan D. Parab, Benjamin Aronson, Benjamin Gould, Aaron Greco, Tao Sun

    In laser-based directed energy deposition (DED) additive manufacturing, interactions among the laser beam, particle flow, and melt pool influence the properties of the solidified final part. Two separate DED systems, one with high powder flow rates to represent industrial-scale DED processing and the other with low powder flow rates for individual particle tracking, were synchronized with the high-speed

    更新日期:2020-11-19
  • A Review of Slag Refining of Silicon Alloys
    JOM (IF 2.029) Pub Date : 2020-11-19
    Sridevi Thomas, Mansoor Barati, Kazuki Morita

    Slag refining of silicon has been modified in recent years by combining the process with solvent refining, in which an alloy of silicon is first treated by slag and then solidified under controlled conditions to yield high-purity silicon crystals. This paper discusses the effect of alloying elements on the efficiency of slag treatment. A set of criteria are established and quantified for potential

    更新日期:2020-11-19
  • The Effect of γ ″ and δ Phase Precipitation on the Mechanical Properties of Inconel 718 Manufactured by Selective Laser Melting: An In Situ Neutron Diffraction and Acoustic Emission Study
    JOM (IF 2.029) Pub Date : 2020-11-18
    Jan Čapek, Efthymios Polatidis, Michal Knapek, Christophe Lyphout, Nicola Casati, Robert Pederson, Markus Strobl

    The deformation behavior of additively manufactured Alloy 718 in as-built condition and after annealing was studied in situ under tensile loading along the build direction. Pre-characterization by synchrotron X-ray diffraction and electron microscopy revealed a significant amount of γ″ precipitates in the as-built samples, whereas the γ″ phase was entirely consumed and needle-like δ precipitates appeared

    更新日期:2020-11-19
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