Article
Chemistry, Physical
Mingwang Xie, Wei Huang, Huiming Chen, Liukui Gong, Weibin Xie, Hang Wang, Bin Yang
Summary: This study experimentally investigated the microstructural evolution and strengthening mechanisms of pure copper and Cu-Ag alloys subjected to cold rolling. The results showed that dislocation strengthening and boundary strengthening were the dominant mechanisms in cold-rolled Cu-Ag alloys, with the addition of silver leading to higher steady-state strength due to increased concentration of dislocations and subgrain boundaries, and a larger volume fraction of high-strength eutectic colonies in Cu-15Ag compared to Cu-10Ag.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Nanoscience & Nanotechnology
Pengfei Zhang, Yanjun Zhou, Yahui Liu, Shaolin Li, Kexing Song, Jun Cao, Baoan Wu, Xin Li, Hanjiang Wu, Jihua Gu, Siyu He, Yan Gao
Summary: This study investigates the evolution of strength and microstructure in Cu-20Ag alloy during wire drawing process. The lamellar structures and the formation of nano-twins resulting from these structures have been found to significantly increase the wire's strength. Additionally, when the wire diameter is less than 2.95 mm, strengthening is mainly achieved through grain size refinement.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Chemistry, Physical
Jiaxing Xu, Jianjun Gao, Hongling Qin, Zhiyang Liu, Linpeng Zhu, Haibin Geng, Ligang Yao, Zhilong Zhao
Summary: Cu nanowires and nanoporous Ag matrix were fabricated through the directional solidification and selective dissolution of Ag-Cu eutectic alloys. The size of the nanowires and pores can be controlled by adjusting the growth rate and corrosion time.
Article
Materials Science, Multidisciplinary
Shanmukha Kiran Aramanda, Kamanio Chattopadhyay, Abhik Choudhury
Summary: The paper investigates the evolution of complex patterns in the ternary Ag-Cu-Sb eutectic system, revealing the formation mechanisms of various microstructures, including three-phase eutectic and two-phase growth instabilities. Different microstructures emerge as a result of distinct crystal orientations and growth mechanisms in the presence of temperature gradients.
Article
Materials Science, Multidisciplinary
Aline Ferreira Schon, Nicolau Apoena Castro, Andre dos Santos Barros, Jose Eduardo Spinelli, Amauri Garcia, Noe Cheung, Bismarck Luiz Silva
Summary: This study quantitatively extracted microstructural characteristics of SAC207 and SAC307 alloys and utilized them in a multiple linear regression model. The addition of tertiary dendritic spacing significantly improved the MLR results for the SAC307 alloy, suggesting potential technical supports for regulating or improving tensile properties of solder alloys.
Article
Chemistry, Physical
Xin-Rong Duan, Yan Chen, Zhi-Yuan Hong, Song-Wei Wang, Shuai-Feng Chen, Shi-Hong Zhang
Summary: The addition of P element in Cu-4Sn alloy can form a P-rich phase, refine the casting microstructure, and enhance the strength and elongation of the alloy. However, it slightly decreases the conductivity due to increased electron scattering.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Tao Ma, Sicong Zhao, Erjun Guo, Lili Zhao, Rui Fan, Yu Zhang, Liping Wang
Summary: In this study, a high-strength Mg-6Gd-2Y-1.5Ag-1Nd-0.4Zn-0.5Zr alloy was developed through the construction of multi-orientated nano-precipitates, leading to significant improvement in mechanical properties. The comprehensive investigation of the corresponding microstructure and strengthening mechanism was conducted under various heat treatment conditions, revealing a three-stage precipitation evolution process and outstanding mechanical properties achieved through synergistic strengthening of nano-precipitates.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Chemistry, Physical
Nanhui Peng, Lihua Zhan, Zetian Song, Wenli Zhu, Yongqian Xu, Bolin Ma, Quanqing Zeng, Kai Chen, Shanfeng Lao, Qi Zheng
Summary: This study proposes a novel approach of room-temperature random vibration (RRV) to suppress the challenges faced by conventional thermal strengthening treatments. The microstructures of the 2219 Al-Cu alloy were found to change after random vibration treatment, with the generation of dislocation networks and solute clusters, leading to improved mechanical properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Y. Cui, J. W. Xian, A. Zois, K. Marquardt, H. Yasuda, C. M. Gourlay
Summary: The factors affecting the nucleation and morphology of large Ag3Sn plates in solder joints are not well understood. This study investigates the faceted solidification of Ag3Sn and reveals transitions from single crystal plates to cyclic twinned plates and highly branched structures. Real-time X-ray imaging confirms that Ag3Sn cyclic twins originate from a common point during nucleation or the early stages of growth. Soldering to copper substrates catalyzes Ag3Sn nucleation through constitutional supercooling and geometrical catalysis.
Article
Electrochemistry
Songsong Guo, Liangbo Sun, Zhen Zheng, Jian Fang, Yue Wen, Chunfeng Liu, Jie Zhang
Summary: A novel Mo/Ag composite interlayer was designed for joining Si3N4 to 316 L stainless steel, with the addition of an Ag layer to eliminate Cu-rich phase and relieve residual stress. Inserting a 0.3 mm Ag layer divided bulk Cu-rich phase into tiny particles and enhanced resistance corrosion. However, residual tensile stress from FEM analysis may have a negative effect on the corrosion resistance of the 316 L substrate.
ELECTROCHIMICA ACTA
(2021)
Article
Chemistry, Physical
Andraz Jug, Mihael Bruncko, Rebeka Rudolf, Ivan Anzel
Summary: A new silver-based alloy with 2 wt.% lanthanum was studied for its potential use as electric contact material. The alloy was prepared using the melt spinning technique, which resulted in the formation of fine α(Ag) grains and intermetallic Ag5La particles. Rapid solidification improved the microstructure and led to the formation of submicron-sized La2O3 oxide nanoparticles through subsequent internal oxidation. High-temperature internal oxidation further modified the microstructure, resulting in the formation of homogeneously dispersed nano-sized La2O3 within the grains and on the grain boundaries.
Article
Materials Science, Multidisciplinary
Dawei Yuan, Jinshui Chen, Xiangpeng Xiao, Baojun Han, Hao Huang, Baixiong Liu, Bin Yang
Summary: The research found that directionally solidified Cu-Fe-Cr-Ag alloy exhibited excellent mechanical properties and conductivity, with higher tensile strength and conductivity compared to upward continuously casted alloy after cold drawing and isothermal aging. The finer and more uniform Fe dendrites, Cu-Ag eutectic structure, and distribution of Ag around the material contributed to the superior comprehensive performance of the directionally solidified Cu-Fe-Cr-Ag alloy.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Wang Jinhua, Yan Erhu, Di Chongbo, Chen Yuncan, Liu Wei, Wang Hao, Ge Xiaoyu, Cheng Jian, Huang Renjun, Sun Lixian
Summary: Directional solidification experiments on the Nb47Ti21Co37 quasi-peritectic alloy at different drawing speeds reveal changes in a-Nb phase morphology and refinement of quasi-peritectic structure in the steady-state growth zone. An exponential linear relationship between quasi-peritectic interphase spacing and drawing speed is observed. Gradual deterioration of the directional arrangement of the quasi-peritectic structure is noted with increasing drawing speed.
RARE METAL MATERIALS AND ENGINEERING
(2021)
Article
Chemistry, Physical
Xu Yang, Ruirun Chen, Tong Liu, Xuefeng Gao, Hongze Fang, Gang Qin, Yanqing Su
Summary: The effect of solidification rate on the microstructure and tensile properties of Ni36Co30Fe11Cr11Al6Ti6 high entropy alloys (HEAs) was investigated. It was found that the strength of the alloy increased with increasing solidification rate. At a solidification rate of 100 mu m/s, the alloy exhibited excellent comprehensive properties with a yield strength, fracture strength, and tensile strain of 732 MPa, 1020 MPa, and 34.9%, respectively. The directionally solidified Ni36Co30Fe11Cr11Al6Ti6 HEAs showed high yield strength of 533 MPa at 900 degrees C. Fine grain strengthening, solid solution strengthening, second phase strengthening, and hysteresis diffusion effects played important roles in enhancing the mechanical properties. The directionally solidified Ni36Co30Fe11Cr11Al6Ti6 HEAs with excellent mechanical properties have great potential in industrial applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Nanoscience & Nanotechnology
Shipeng Yue, Guoliang Li, Jianping Qu, Shichao Liu, Zhongkai Guo, Jinchuan Jie, Shengli Guo, Tingju Li
Summary: In this work, cold drawing deformation was used to improve the strength and electrical conductivity of Cu-20Fe alloy. The microstructure evolution and strengthening mechanisms, as well as the variation in conductivity were investigated. It was found that both Cu matrix grains and Fe-rich dendrites could be refined and transformed into fibrous structure with increasing drawing strain. The resulting alloy exhibited a yield strength of 1173 MPa and an electrical conductivity of 41 %IACS.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
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)