Article
Materials Science, Multidisciplinary
Beibei Dong, Zhimin Zhang, Jianmin Yu, Mu Meng, Yong Xue, Huifang Zhang, Xi Zhao, Xianwei Ren, Shaobin Bai
Summary: This paper comprehensively investigates the microstructure evolution and mechanical properties of industrial-scale Mg alloys. The results reveal heterogeneous microstructure and anisotropic texture and mechanical properties of the RUEed samples. The edge region along the extrusion direction shows superior tensile strength due to smaller grain size and higher area fraction of dynamic recrystallized grains.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
Zeru Wu, Jianmin Yu, Ziwei Zhang, Hongbing Hu, Zhimin Zhang
Summary: The static recrystallization behavior of a deformed Mg-13.14Gd-3.86Y-2.0Zn-0.39Zr alloy after different annealing treatments was investigated. The degree of recrystallization increased with higher annealing temperatures. The main mechanism for recrystallized grains formation was the transformation of low-angle grain boundaries into high-angle grain boundaries. The annealing treatment also resulted in a decrease in dislocation density and average grain size. Furthermore, the precipitation behavior of the Mg5(Gd,Y) phase changed from grain boundaries to inside the grains. The annealing treatment consumed the LPSO phases and caused a decrease in the basal texture strength of the alloy.
Article
Chemistry, Physical
Guoqin Wu, Zhaocan Li, Jianmin Yu, Hongbing Hu, Yali Duan, Beibei Dong, Zhimin Zhang
Summary: The texture evolution mechanism of Mg-13.1Gd-3.9Y-2Zn-0.4Zr (wt%) alloys during reciprocating upsetting extrusion and subsequent heat treatment was investigated. The influence of deformation passes on texture weakening and deformation mechanism was discussed. The results showed that the basal texture intensity decreased with increased deformation passes and significantly decreased after T6 heat treatment. The anisotropy of the alloys was maintained after T5 treatment and eliminated after T6 treatment.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Ming Yuan, Chao He, Jun Zhao, Huabao Yang, Yan Song, Bin Lei, Xiaoying Qian, Zhihua Dong, Qian Li, Bin Jiang, Fusheng Pan
Summary: The Mg-2.6Sm-1.3Gd-0.6Zn-0.5Zr (wt.%) alloy was prepared by metal mold casting and hot extrusion, showing an age-hardening response at 200 degrees C with good mechanical properties. The main strengthening mechanisms of the investigated alloy are fine-grain strengthening, solid solution strengthening, and precipitate strengthening.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Chemistry, Physical
Yuanqing Chi, Jinwei Liu, Zhijie Zhou, Shouzhong Wu, Weiqing Liu, Mingyi Zheng
Summary: This study mainly investigates the microstructure, texture, and mechanical properties of Mg-Gd-Y alloys (Mg-8.5Gd-2.5Y-0.3Zr (wt%) (0Zn) and Mg-8.5Gd-2.5Y-0.5Zn-0.3Zr (wt%) (0.5Zn) alloys) under indirect extrusion at different temperatures. The addition of 0.5 wt% Zn promotes the dynamic precipitation of beta-Mg5RE phases, resulting in a well-distributed distribution in the 0.5Zn alloy compared to a local distribution in the 0Zn alloy. The presence of zinc and the extrusion temperature influence the texture formation and mechanical properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Nanoscience & Nanotechnology
Cen Huang, Chuming Liu, Shunong Jiang, Yingchun Wan, Yonghao Gao
Summary: In this study, a bulky Mg-Gd-Y-Zn-Ag-Zr alloy was prepared through multi-directional forging under specific conditions. The microstructure, texture, and mechanical properties of different regions were analyzed, showing significant grain refinement but also inhomogeneous microstructures and mechanical anisotropy. The optimum mechanical properties were found in the center region, indicating the complexity of the relationship between microstructure and mechanical performance in the alloy bulk.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Chemistry, Physical
Ya Liu, Jiuba Wen, Huan Li, Junguang He
Summary: The effects of extrusion temperature and extrusion ratio on the microstructure, corrosion resistance, and mechanical properties of Mg-Zn-Gd-Y-Zr alloy were investigated. Higher extrusion temperatures and larger extrusion ratios were found to result in better mechanical properties and corrosion resistance.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Jingjing Jia, Zhimin Zhang, Beibei Dong
Summary: This study comparatively investigated the effects of intermediate annealing and intermediate annealing subsequent aging treatment on an Mg-9Gd-4Y-2Zn-0.5Zr alloy. It was found that the intermediate annealing treatment resulted in the highest dynamic recrystallization (DRX) grains and the largest average DRXed grain size. On the other hand, the intermediate annealing subsequent peak-aging treatment led to significantly smaller DRXed grains. The UAAE sample exhibited excellent strength-ductility synergy with higher ultimate tensile strength (UTS) and failure elongation (EL) compared to the UE sample.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Beibei Dong, Jing Chai, Guoqin Wu, Huifang Zhang, Zhimin Zhang, Jianmin Yu, Yong Xue, Mu Meng
Summary: The effects of isothermal multi-directional forging (MDF) on the microstructure, texture evolution, and mechanical properties of homogenized Mg-13Gd-4Y-2Zn-0.5Zr alloy were investigated in this study. The results showed that the MDF passes gradually decreased the average grain size of the alloy, resulting in a more uniform microstructure distribution. The MDF process also led to changes in the distribution of LPSO phases and Mg5(Gd,Y) precipitates within the grains. Additionally, the maximum texture intensity on the basal plane decreased with the increasing MDF passes due to the formation of dynamic recrystallized grains. The alloy exhibited excellent mechanical properties, attributed to various strengthening mechanisms such as grain boundary strengthening, dislocation strengthening, texture strengthening, and precipitation strengthening.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Chemistry, Physical
Lin Yan, Zhimin Zhang, Yong Xue, Jian Xu, Beibei Dong, Xubin Li
Summary: This paper investigates the grain refinement and mechanical performance improvement of Mg-9Gd-4Y-2Zn-0.5Zr alloy after rotating shear extrusion (RSE) and backward extrusion (BE) methods. The results demonstrate that RSE method has more advantages than BE method in terms of grain refinement and mechanical performance improvement.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Yali Duan, Jianmin Yu, Beibei Dong, Huifang Zhang, Mu Meng, Mei Cheng, Zhimin Zhang, Baohong Zhang, Hongyuan Hao, Ping Xu, Huiling Liu
Summary: Rotating backward extrusion (RBE) is a severe plastic deformation (SPD) method used to produce cylindrical components with very large strain by a single pass. The cup-shaped sample formed by RBE exhibited a typical gradient microstructure, with the average grain size decreasing along the radial direction due to different strains and strain rates in different regions. The center region showed the highest deformation and the edge region exhibited the lowest deformation in the RBEed sample.
Article
Materials Science, Multidisciplinary
Weidong Qiao, Chao Liu, Zhimin Zhang, Yong Xue
Summary: In this study, a novel large height-to-diameter ratio upsetting-extrusion process was used to deform Mg-Gd-Y-Zn-Zr alloy bars. The results showed that a lower extrusion temperature favored the precipitation of large particles of Mg5(RE) phase and refined the grains, leading to an increase in recrystallization fraction and improved mechanical properties of the alloy. Texture strengthening and dislocation strengthening were the main contributors to the mechanical properties, and the presence of coarse grains accommodated deformation and enabled high elongation.
Article
Materials Science, Multidisciplinary
Zahra Abbasi, Ramin Ebrahimi, Jose Maria Cabrera
Summary: Magnesium alloy shows enhanced properties through alloying with rare earth elements. Dynamic recrystallization is the main mechanism for the formation of bimodal microstructures in magnesium alloys, and increasing the amount of alloying elements promotes recrystallization and weakens texture intensity.
METALS AND MATERIALS INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Heqian Song, Lunyong Zhang, Zhiliang Ning, Yufeng Wang, Junying Yi, Fuyang Cao, Jianfei Sun
Summary: The study found that the surface oxidation film defect of Mg-Gd-Y-Zr alloy during solidification is related to the difference in thermal expansion coefficient and can cause the formation of bifilm defects. When the magnesium alloy melt fills the crack, Zr precipitates into crystal nucleus and Y2O3 accumulates.
Article
Materials Science, Multidisciplinary
Mengxian Zhang, Zixuan Wang, Zhimin Zhang, Yong Xue
Summary: This paper investigates the microstructure and mechanical properties of Mg-9Gd-4Y-2Zn-Zr alloy after one pass of large height-to-diameter ratio upsetting and extrusion, and explores the effect of deformation temperature. The results show that with the increase in deformation temperature, the grain size decreases, the dynamic recrystallization rate increases, and the granular b phase increases, indicating a change in texture towards typical extrusion texture. The mechanical properties of the alloy, including ultimate tensile strength, yield strength, and elongation, increase with the increase in temperature.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Chemistry, Physical
Guanshi Zhang, Zhimin Zhang, Yue Du, Zhaoming Yan, Xin Che
Article
Chemistry, Physical
Zhimin Zhang, Zhaoming Yan, Yue Du, Guanshi Zhang, Jiaxuan Zhu, Luying Ren, Yiding Wang
Article
Materials Science, Multidisciplinary
Zhaoming Yan, Min Fang, Zhendong Lian, Zhimin Zhang, Jiaxuan Zhu, Guanshi Zhang, Yiding Wang
Article
Chemistry, Physical
Guanshi Zhang, Zhimin Zhang, Xubin Li, Zhaoming Yan, Xin Che, Jianmin Yu, Yingze Meng
JOURNAL OF ALLOYS AND COMPOUNDS
(2019)
Article
Chemistry, Physical
Guanshi Zhang, Zhimin Zhang, Yingze Meng, Zhaoming Yan, Xin Che, Xubin Li
Article
Chemistry, Physical
Zhaoming Yan, Zhimin Zhang, Xubin Li, Jian Xu, Qiang Wang, Guanshi Zhang, Jie Zheng, Hongzhi Fan, Kaihua Xu, Jiaxuan Zhu, Yong Xue
JOURNAL OF ALLOYS AND COMPOUNDS
(2020)
Article
Materials Science, Multidisciplinary
Wenlong Xu, Jianmin Yu, Guoqin Wu, Leichen Jia, Zhi Gao, Zhan Miao, Zhimin Zhang, Feng Yan
Article
Chemistry, Physical
Jie Zheng, Zhaoming Yan, Qiang Wang, Zhimin Zhang, Yong Xue
Article
Materials Science, Multidisciplinary
Zhaoming Yan, Jie Zheng, Jiaxuan Zhu, Zhimin Zhang, Qiang Wang, Yong Xue
Article
Materials Science, Multidisciplinary
Xiongwen Xue, Qiang Wang, Xiaoqian Song, Zhaoming Yan, Jie Zheng, Chang Gao, Caihong Yin, Yong Xue
MATERIALS RESEARCH EXPRESS
(2020)
Article
Materials Science, Multidisciplinary
Ya Cui, Yusha Shi, Jie Zheng, Zhaoming Yan, Jishi Zhang, Zhimin Zhang, Qiang Wang, Yong Xue
Summary: The study focused on the microstructure, tensile properties, and fatigue properties of Mg- 8.8Gd- 3.5Y- 1.5Zn- 0.5Zr alloy under T4 and T6 heat treatment conditions. It was found that the alloy's strength can be increased through aging treatment, and the tensile temperature has a significant impact on the alloy's mechanical properties, with intergranular fracture occurring at 250 degrees Celsius. The fatigue life of the alloy was found to be longer after aging treatment compared to solution treatment.
MATERIALS RESEARCH EXPRESS
(2021)
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)