Article
Chemistry, Physical
Ling Lin, Lian Zhou, Yu Xie, Weimin Bai, Faguo Li, Ying Xie, Mingxin Lu, Jue Wang
Summary: In this study, a pre-refinement method was proposed to avoid silicon poisoning and recover the refinement effect of Al-5Ti-1B in Hypoeutectic Al-Si-Mg alloys. The results showed that the pre-refinement alloy had significantly smaller grain diameter and superior mechanical properties after solid-solution and aging heat treatments compared to post-refinement and non-refinement alloys. The proposed method demonstrated effective avoidance of silicon poisoning and optimization of mechanical properties in the alloy.
Article
Chemistry, Physical
Honglei Xi, Wenlong Xiao, Heng Li, Yu Fu, Ge Yi, Juhong Qie, Xiaozhao Ma, Chaoli Ma
Summary: The microstructure evolution and mechanical properties of Al-7Si-0.35Mg alloy with different amounts of submicron-sized TiC particle addition were investigated. The results showed that the addition of TiC improved the mechanical properties, with the best combination obtained at 0.3wt% TiC addition.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Peng Tang, Fengyang Yu, Xiaodan Teng, Linxin Peng, Kang Wang
Summary: The study investigates the effect of beryllium (Be) addition on the microstructure and mechanical properties of a 15%Mg2Si/Al-8Si composite. It was found that the addition of 1.5%Be led to the best improvement in mechanical properties and modification of the alloy's microstructure.
MATERIALS CHARACTERIZATION
(2021)
Article
Chemistry, Multidisciplinary
Hong-Chen Yu, Yu-Zhuo Men, Shu-Guo Yang, Hui Liu, Lei Yu, Xue-Dong Xu, Yi-Fei Li, Chang-Sheng Zou, Hao-Nan Wang, Wei-Rong Zhong
Summary: The study investigated the combined influence of Mg/Si and Ca contents on the crystallization of primary Mg2Si in Al-Mg2Si alloy. By restricting the embryo formation and growth of primary Mg2Si, the researchers successfully prepared dice-like primary Mg2Si in an over-modified alloy, revealing a novel method to control the morphology and particle size of primary Mg2Si and further understand the crystallization process.
Article
Chemistry, Physical
Yixiao Wang, Guohua Wu, Liang Zhang, Youjie Guo, Cunlong Wang, Liangbin Li, Xunman Xiong
Summary: In this study, Sc and Ti were added to sand-cast Al-Li-Cu-Mg-Zr casting alloy for the first time. The results showed that the grain size decreased and Cu-rich phase increased with the addition of Sc and Ti. The strength of the alloy was significantly increased by Sc and Ti through the stimulation of T1 and S' phases, finer 8', higher number density of core-shell composites, and narrower 8'-precipitation free zones.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Dongqing Zhang, Kai Zhao, Daoxiu Li, Lei Ren, Guiliang Liu, Sida Liu, Xiangfa Liu
Summary: In this study, novel TiC particles doped with trace amounts of B (TiCB) were introduced to improve the solidification microstructure, extrusion behavior, and mechanical properties of Al-Mn alloy. The results showed that TiCB particles could refine alpha-Al grains, hinder grain growth, and retain geometrically necessary dislocations. Moreover, the addition of TiCB particles significantly improved the mechanical properties of the alloy at room temperature and elevated temperature.
MATERIALS & DESIGN
(2022)
Article
Chemistry, Physical
Chao Li, Cheng Wang, Zhi-Zheng Yang, Pin-Kui Ma, Ming-Wen Ren, Hui-Yuan Wang
Summary: The addition of 0.2 wt% Ca-Sb to Al-11Mg(2)Si alloy significantly refines the eutectic Mg2Si and enhances the tensile properties of the material. Increasing the Ca-Sb content to 1.0 wt% leads to a microstructure transition from hypoeutectic to hypereutectic characteristics.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
William P. Bates, Vivek Patel, Harikrishna Rana, Joel Andersson, Jeroen De Backer, Mattias Igestrand, Livan Fratini
Summary: The present study aims to enhance the mechanical properties of hypereutectic aluminium-silicon castings by modifying the microstructure and reducing defects through friction stir processing (FSP). By altering the tool revolution and the number of FSP passes, the study identified the specimen with the highest number of passes to have the most uniform properties, resulting from reduced casting porosities and refined silicon particle distribution in the friction stir processed zone.
METALS AND MATERIALS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Da Teng, Guangzong Zhang, Shuo Zhang, Junwen Li, Renguo Guan
Summary: The effects of different preparation temperatures on the number and distribution of phases in Al-Ti-C-Ce master alloy and the microstructure and mechanical properties of A356 alloy were investigated. The results showed that Al-5Ti-0.6C-1.0Ce prepared at 1050 degrees C significantly refined the microstructure of A356 alloy and improved its mechanical properties. The ultimate tensile strength and elongation of A356 alloy reached peak values at preparation temperatures of 1050 degrees C and 950 degrees C, respectively.
Article
Materials Science, Multidisciplinary
Hongkui Mao, Peng Lian, Qi Wei, Yu Wang, Hong Xu, Yanjun Li
Summary: The effects of scandium additions on the solidification microstructure and mechanical properties of Al-7Si-0.6Mg-0.25Ti alloy have been studied. Scandium addition refines the grain structure and transforms the Al-Si eutectics into a fibrous structure. The alloy exhibits improved strength and ductility, with reduced sensitivity to local cooling rates. The addition of Sc is found to form a new phase acting as nucleation sites for Al grains, overcoming the Si poisoning effect on grain refinement for Al-Ti-B grain refiners.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Nanoscience & Nanotechnology
Nayara Aparecida Neres da Silva, Pedro Henrique R. Pereira, Elaine Carballo Siqueira Correa, Maria Teresa Paulino Aguilar, Paulo Roberto Cetlin
Summary: Experiments were conducted to examine the flow behavior and microstructural evolution in a Zn-Al-Cu-Mg alloy processed by multi-directional forging (MDF). The alloy exhibited shear banding, twinning, work hardening, grain refinement, and flow softening in different stages of deformation. Different components in the alloy displayed various kinetics of hardening and grain refinement, with the rule of mixtures overestimating the flow stresses compared to in-situ stress-strain curve.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Yinling Jin, Hongze Fang, Ruirun Chen, Shichen Sun, Shu Wang, Yanqing Su, Jingjie Guo
Summary: In this study, in situ Al-Mg2Si graded materials were prepared using traveling magnetic field to quantitatively analyze the mechanisms of graded distribution and refinement in electromagnetic separation technology. Both simulation and experiment showed that traveling magnetic field could change the distribution and size of Mg2Si in the alloy. The best effect of graded distribution was achieved with a 6A excitation current density. The refinement of Mg2Si particle was found to result from stirring and crushing by magnetic field, rather than nucleation. The graded distribution mechanism was attributed to the resultant force acting on Mg2Si particle, promoting its distribution near the outer region.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Liwei Wang, Tao Wu, Aiping Liu, Huan Yan, Yaning Mao, Ying Liu, Zhenzhen Peng, Dianlong Wang, Zhimin Liang, Qian Wang, Guang Yang, Balaji Narayanaswamy
Summary: In this study, Al-Mg alloy was produced using cold metal transfer arc additive manufacturing with a strip-shaped Al-5Ti-1B grain refiner. The results showed that the grain refiner acted as heterogeneous nucleation points during solidification, transforming columnar grains into equiaxed ones and refining the grains. Moreover, the grain refiner increased the fraction of low-angle grain boundaries and reduced the anisotropy in mechanical properties. Additionally, it eliminated the low hardness zone between the layers, improving the mechanical properties of the additively manufactured Al-Mg alloy.
Article
Chemistry, Physical
Wanwu Ding, Lumin Gou, Liwen Hu, Haixia Zhang, Wenjun Zhao, Jinyuan Ma, Jisen Qiao, Xiaochun Li
Summary: This paper investigates the effects of a novel Al-3Ti-4.35La master alloy on the morphology of eutectic Si and mechanical properties of hypoeutectic Al-7Si alloy, and reveals its modification mechanism. The results show that the addition of Al-3Ti-4.35La master alloy can transform the eutectic Si phase into a fine fiber and partial granular structure, significantly enhancing the ultimate tensile strength and elongation of the alloy.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Wenxue Zhang, Hailin He, Youping Yi, Shiquan Huang
Summary: Rings made of 2219 Al alloy often have poor mechanical properties due to coarse elongated grains and a large number of coarse Al2Cu particles. A novel thermomechanical process was tested to refine the microstructure and improve the mechanical properties. The process involved higher temperature multi-directional forging and lower temperature ring rolling, resulting in increased spherical shapes, reduced coarse Al2Cu particles, and finer grain structure.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(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)