Article
Nanoscience & Nanotechnology
Jiazhi Li, Hua Ding, Baomian Li
Summary: The study revealed the relationship between the rolling-aging sequence and the microstructure evolution, mechanical-electrical properties of a hot rolled-quenched Cu-0.67Cr-0.27Zr-0.12Ni-0.03Si-0.04Ti alloy. A good combination of strength and electrical conductivity was achieved in the alloy through a specific aging-rolling-aging process, with strength improvement mainly attributed to dislocation density strengthening.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Chemistry, Physical
Natalia Martynenko, Olga Rybalchenko, Anna Bodyakova, Dmitriy Prosvirnin, Georgy Rybalchenko, Mikhail Morozov, Vladimir Yusupov, Sergey Dobatkin
Summary: A study was conducted on the effect of rotary swaging (RS) on the microstructure and properties of a Cu-0.5%Cr-0.08%Zr alloy that was pre-extruded and pre-quenched. RS resulted in the formation of an ultrafine-grained (UFG) microstructure. This UFG structure increased the ultimate tensile strength (UTS) to 443 +/- 5 MPa and 597 +/- 9 MPa for the pre-quenched and pre-extruded alloys, respectively. Ductility was reduced after RS.
Article
Materials Science, Multidisciplinary
Bowen Ma, Bailing An, Xue Zhao, Yunchao Li, Jingwen Du, Engang Wang
Summary: Doping Sc can enhance the mechanical properties of Cu-Cr-Zr alloy while maintaining its electrical conductivity. The addition of Sc leads to the formation of a new intermetallic compound with Zr, which segregates at the grain boundary. The solution + rolling + aging process results in improved properties, including the formation of nanoscale precipitates and subgrains. The addition of Sc increases the ultimate tensile strength and hardness of the alloy without significant reduction in electrical conductivity, expanding its application range.
Article
Nanoscience & Nanotechnology
Jiazhi Li, Hua Ding, Baomian Li, Li Wang
Summary: The study investigated the effects of multistage rolling and aging on a Cu-Cr-Zr-Ni-Si-Ti alloy, and found that the optimal comprehensive performance can be achieved through three-stage rolling and aging. The microstructure and various strengthening mechanisms play key roles in improving the mechanical and electrical properties of the alloy.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Bingbing Shi, Du Hong, Wenweijiao Wang, Longshui Su, Chen Wang, Lei Xiao, Tianyu Ma, Jianhui Zhou
Summary: A novel precipitation-strengthened Cu-1.1 wt% Hf-0.1 wt% Si alloy with high strength and high electrical conductivity is prepared by solution, cold-rolling, and aging processes. The precipitation of Hf and Si atoms from the matrix is helpful to enhance the electrical conductivity. The high strength of Cu-Hf-Si alloy is mainly due to the multiprecipitates synergistic strengthening.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Chemistry, Physical
Longjian Li, Huijun Kang, Siruo Zhang, Rengeng Li, Xiong Yang, Zongning Chen, Enyu Guo, Tongmin Wang
Summary: The Cu-1Cr-0.2Zr (wt%) alloys with trace Mg (0.05 wt%) were prepared using a two-step cryorolling and aging (CRA) process. The effects of the CRA process and Mg element on microstructural evolution, mechanical properties, and electrical conductivity were investigated. The two-step CRA process resulted in the formation of high-density deformation twins and dislocations, while the addition of Mg element decreased the widths of deformation bands and twins. The fine precipitates and depletion of Cr and Zr elements contributed to the enhanced performance of Cu-Cr-Zr-Mg alloys, achieving high tensile strength and electrical conductivity simultaneously.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Metallurgy & Metallurgical Engineering
Hai-te Yang, Wen-wei-jiao Wang, Chen Wang, Jian Wang, Jian-hui Zhou, Chang-qing Tong, Jun-feng Chen, Bing-shu Wang
Summary: The effects of aging process on the conductivity, mechanical properties, and microstructure of Cu-1.0Cr-0.1Zr alloy strips were studied. The best comprehensive properties were achieved after aging at 430℃ for 180 min, with the alloy exhibiting an electrical conductivity of 85.86% IACS, a hardness of HV 176.54, and a tensile strength of 552 MPa. The precipitation kinetics and phase growth were analyzed, showing a change in the relationship between the precipitates and matrix.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2023)
Article
Materials Science, Multidisciplinary
Chenying Shi, Muzhi Ma, Biaobiao Yang, Yuling Liu, Yushen Huang, Yong Du
Summary: In this study, the effect of Ti content on the microstructure, mechanical, and electrical properties of Cu-Cr-Zr alloys was investigated. The electrical conductivity decreased with increasing Ti content due to electron scattering. The higher hardness/strength was attributed to higher dislocation density and finer FCC-Cr precipitates. Thermodynamic and kinetic calculations showed that increasing Ti content facilitated the nucleation of FCC-Cr but hindered its growth process.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Physical
Yuxia Ma, Huiqin Chen, Hui Li, Shue Dang
Summary: This study investigates the structure and properties of Cu-1.0% Cr-0.1% Zr alloy in a solid solution state through ageing treatments at different temperatures and holding times. The results show that the percentage and size of the precipitated Cr phase increase while the dislocation density decreases with increasing ageing temperature and holding time. Tensile strength and electrical conductivity exhibit a trend of increasing first and then decreasing.
Article
Materials Science, Multidisciplinary
Jiqiang Zhou, Yushan Huang, Zheng Li, Xin Tong, Deqiang You, Junjie Yang, Qingmao Zhang, Wei Li, Xiaojian Wang
Summary: Copper-Chromium-Zirconium alloys are favored in electronic materials due to their excellent electrical conductivity and mechanical strength. However, additive manufacturing of Cu-Cr-Zr alloy parts remains challenging. This study used laser powder bed fusion (LPBF) to process Cu-Cr-Zr alloy and determined optimal processing parameters by monitoring sample density. Direct aging treatment from 400°C to 620°C improved strength and electrical conductivity. Tensile strength initially increased and then decreased with aging temperature, while electrical conductivity gradually increased. Aging at 475°C for 2 hours resulted in a tensile strength of 519.3 MPa, 15.5% elongation, and 78.7% IACS electrical conductivity. Theoretical calculations indicated that precipitates of Cr-enriched phases were the main factors behind increased strength and electrical conductivity.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Nanoscience & Nanotechnology
Muzhi Ma, Zhou Li, Zhu Xiao, Yanlin Jia, Xiangpeng Meng, Yanbin Jiang, Yue Hu
Summary: This paper investigates the microstructure and properties of a series of Cu-based alloys fabricated through multi-step thermo-mechanical treatment (TMT). The results show that these alloys exhibit a combination of high strengths and high conductivity. The study also reveals the influence of alloy composition on the properties.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Junqing Han, Yuying Wu, Kai Zhao, Sida Liu, Tong Gao, Xiangfa Liu
Summary: The effect of trace B on the properties and microstructure of Cu-Cr-Zr alloy was investigated in this work. It was found that B can accelerate the precipitation rate of Cr and promote the formation of coherent G.P zones in the alloy. In addition, the addition of trace B improves the hardness and electrical conductivity of the alloy, with 0.03wt% B showing the peak performance.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
Rufei Zhu, Huafen Lou, Yuning Liu, Jianing Zhang, Hu Wang, Yongda Mo, Yunpeng Wang
Summary: In this study, the effect of electropulsing aging treatment on cold-rolled Cu-Ni-Si copper alloy was investigated. The results showed that electropulsing aging treatment without the use of a furnace achieved high strength and excellent electrical conductivity. Additionally, electropulsing aging treatment facilitated the diffusion of Ni and Si atoms, accelerating the precipitation hardening process and improving the properties of the Cu-Ni-Si alloy.
Article
Chemistry, Physical
Zhu Qi Chu, Kun Xia Wei, Wei Wei, Igor V. Alexandrov, Xu Long An, Dan Dan Wang, Xiang Kui Liu
Summary: With the rapid development of 5G communication, there is an increasing demand for materials with higher strength and electrical conductivity, such as high-speed backplane connectors and integrated circuit lead frames. Copper alloys have gained wide attention due to their excellent electrical conductivity, thermal conductivity, and strength. This study proposes a new method of preparing Cu-0.5%Cr alloy using equal channel angular pressing (ECAP), deep cryogenic treatment (DCT), and aging treatment (AT). The results show that this method can significantly improve the microstructure, mechanical properties, and electrical conductivity of the Cu-0.5%Cr alloy.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Zhe Shen, Zhongze Lin, Peijian Shi, Jiale Zhu, Tianxiang Zheng, Biao Ding, Yifeng Guo, Yunbo Zhong
Summary: In this study, a high-performance Cu-1Cr-0.1Zr alloy with excellent electrical and mechanical properties, as well as good wear resistance, was successfully prepared by continuous extrusion forming and subsequent peak-aging treatment. The extrusion forming and aging treatment process provide a new and efficient method for the continuous preparation of Cu-Cr-Zr alloys.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Chemistry, Physical
J. Zamora, T. Bautista, N. S. Portillo-Velez, A. Reyes-Montero, H. Pfeiffer, F. Sanchez-Ochoa, H. A. Lara-Garcia
Summary: Experimental and DFT studies were conducted on the structural, magnetic, and optical properties of RFeO3 perovskites. The perovskites exhibited an orthorhombic crystal structure and weak ferromagnetic behavior. They were confirmed to be semiconductors with a bandgap of approximately 2.1 eV.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xianxiang Lv, Jing Jin, Weiguang Yang
Summary: By depositing TiN and TiO2 surface layers on AlSi films, the electrochemical performance of silicon-based anodes can be significantly improved, suppressing volume expansion and promoting the formation of a stable SEI layer.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Sharafat Ali, Haider Ali, Syedul Hasnain Bakhtiar, Sajjad Ali, Muhammad Zahid, Ahmed Ismail, Pir Muhammad Ismail, Amir Zada, Imran Khan, Huahai Shen, Rizwan Ullah, Habib Khan, Mohamed Bououdina, Xiaoqiang Wu, Fazal Raziq, Liang Qiao
Summary: The construction and optimization of redox-heterojunctions using a bifunctional phosphate as an electron-bridge demonstrated significant improvements in photo catalytic activity, including enhanced dispersion, reduced interfacial migration resistance, and increased abundance of active-sites.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ren-Ni Luan, Na Xu, Chao-Ran Li, Zhi-Jie Zhang, Yu-Sheng Zhang, Jun Nan, Shu-Tao Wang, Yong-Ming Chai, Bin Dong
Summary: Extensive research has revealed that oxygen evolution reaction (OER) in alkaline conditions involves dynamic surface restructuring. The development and design of sulfide/oxide pre-catalysts can reasonably adjust the composition and structure after surface reconstruction, which is crucial for OER. This study utilized a simple two-step hydrothermal method to achieve in situ S leaching and doping, inducing the composition change and structure reconstruction of CoFe oxides. The transformed FeOOH and CoOOH exhibited excellent OER activity and could be easily mass-produced using low-cost iron based materials and simple methods.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jun'an Lai, Daofu Wu, Peng He, Kang An, Yijia Wang, Peng Feng, WeiWei Chen, Zixian Wang, Linfeng Guo, Xiaosheng Tang
Summary: Zero-dimensional organic-inorganic metal halides (OMHs) are gaining attention in the fabrication of light-emitting diodes due to their broad emission band and high photoluminescence quantum yield. This work synthesized a zero-dimensional organic tetraphenylphosphonium bismuth chloride (TBC) that showed efficient blue light emission, with the emission mechanism attributed to the transition of Bi3+ ions. White light-emitting diodes (WLEDs) were fabricated using TBC, along with green-emitting and red-emitting single crystals, achieving single-component white emissions. These findings demonstrate the different emission mechanism of ns2 ions-based OMHs and highlight the potential of bismuth-based OMHs in WLEDs applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xuewei Liang, Yunhai Su, Taisen Yang, Zhiyong Dai, Yingdi Wang, Xingping Yong
Summary: The revolutionary design concept of high-entropy alloys has brought new opportunities and challenges to the development of advanced metal materials. In this work, AlCrCuFe2NiTix high-entropy flux cored wires were prepared by combining the design idea of a high-entropy alloy with the characteristics of flux cored wire. AlCr-CuFe2NiTix high-entropy surfacing alloys were prepared using gas metal arc welding technology. The wear properties of the alloys were analyzed, and the phase composition, microstructure, strengthening mechanism, and wear mechanism were discussed. The results show that the alloys exhibit a dendritic microstructure with BCC/B2 + FCC phases. Increasing Ti content leads to the precipitation of Laves phase. The alloys show improved microhardness and wear resistance due to the precipitation of coherent B2 and Laves phases. However, excessive Ti addition results in the increase of Laves phase and reduced wear resistance of the alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
M. Vadivel, M. Senthil Pandian, P. Ramasamy, Qiang Jing, Bo Liu
Summary: This work presents the enhanced photocatalytic and electrochemical performance of g-C3N4 assisted PAA on CoFe2O4 ternary nanocomposites. The incorporation of PAA and g-C3N4 improves the separation efficiency of photogenerated charge carriers, resulting in superior photocatalytic degradation and high specific capacitance values.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Vibhu T. Sivanandan, Ramany Revathy, Arun S. Prasad
Summary: In this study, pure and doped cobalt ferrite nanoparticles were prepared using the sol-gel auto-combustion method with the aid of lemon juice as eco-fuel. The crystal structure, lattice parameter, crystallite size, microstrain, optical parameters, and room temperature magnetic properties of the samples were analyzed. The effect of doping on the magnetic properties was also investigated.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qing Guo, Bowen Zhang, Benzhe Sun, Yang Qi
Summary: This study prepared ZnO films with various nonpolar preferred orientations using conventional chemical bath deposition method and characterized their growth process and mechanism. It was found that the type and concentration of nitrate could control the preferred orientation and surface roughness of ZnO films. Additionally, ZnO films with different preferred orientations exhibited different optical properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Chong Zhang, Yan Liu, Zhaoyan Wang, Hang Yang
Summary: In this study, six bimetallic FeCo particles were synthesized via the hydrothermal method at different Fe:Co ratios. The Fe:Co ratio not only modulates the composition of the particles but also influences their structure and magnetic properties. The FeCo alloys showed a transformation from an Fe-based structure to a Co-based structure with increasing Co content. The Fe:Co ratio of 1:1 and 3:1 resulted in particles with the highest and lowest saturation magnetization, respectively.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jianning Zhang, Jing Li, Yiren Wang, Xiaodong Mao, Yong Jiang
Summary: We conducted a study on the formation of ultra-fine Y-Ti-Ta-O nano-oxides in Ta+B micro-alloyed 13CrWTi-ODS alloys using electron microscopy and first-principles calculations. The Y-Ti-Ta-O nano-oxides were found to be mainly Y2(Ti,Ta)2O7, with an average size of 7 nm and a number density of 6.8 x 1023 m-3. Excess boron was found to enhance the adhesion of some low-sigma grain boundaries but weaken the Fe/Y2Ti2O7 interface, while excess tantalum enhanced the Fe/Y2Ti2O7 interface but caused serious degradation of grain boundaries.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Yirong Fang, Pei Cheng, Hang Yuan, Hao Zhao, Lishu Zhang
Summary: A new composite system of nitrogen-doped reduced graphene oxide and black phosphorus quantum dots has been developed for tumor therapy, showing improved electrochemical properties and stability. The system generates hydrogen peroxide and hydroxyl radical to effectively kill tumor cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xiufang Qin, Yuanli Ma, Hui Zhang, Ting Zhang, Fang Wang, Xiaohong Xu
Summary: The structure and magnetism of cobalt ferrites after Mn2+-Tb3+ co-doping were studied. Co-doped samples exhibited cubic spinel structure and spherical shape of ferrite nanoparticles. The redistribution of Co2+ and Fe3+ ions between octahedral and tetrahedral sites was observed due to Mn2+-Tb3+ co-doping. The coercivity and magnetization saturation of co-doped samples were significantly improved, leading to a maximum energy product that is 190% higher than that of the un-doped sample.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ho Yeon Lee, Wonjong Yu, Yoon Ho Lee
Summary: Recently, there has been an increasing interest in developing ultra-fine nanostructured electrodes with extensive reaction areas to enhance the performance and low-temperature operation of solid oxide fuel cells. The use of a refined approach involving co-sputtering metal alloys and oxide targets has demonstrated the feasibility of nano-columnar structures in perovskite-based electrodes, expanding the temperature range of thin film electrodes. This study systematically examines the effects of chamber pressure control in the co-sputtering process and identifies the intricate relationship between sputtering pressure and film structure. By fine-tuning the columnar growth in the electrode, significant improvements in performance and thermo-mechanical properties were achieved, resulting in high-performance all-sputtered solid oxide fuel cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qianyun Bai, Xiaoxiao Yan, Da Liu, Kang Xiang, Xin Tu, Yanhui Guo, Renbing Wu
Summary: This study proposes a simple method to develop a non-precious transition metal-based electrocatalyst with high catalytic activity and robustness for the hydrogen evolution reaction. The as-synthesized electrode exhibits a low overpotential and high current density, indicating its potential in energy conversion.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)