Article
Chemistry, Physical
Guirong Li, Tuo Xu, Hongming Wang, Yutao Zhao, Gang Chen, Xizhou Kai
Summary: This study investigated the effect of particle content and reduction ratios on the microstructure and texture evolution of A356 matrix and Al2O3p/A356 composites through hot rolling. Results showed that the 0.6 vol.% composite had better Si phase and Al2O3 distribution, leading to improved mechanical properties, while the tensile properties of materials with 75% reduction increased with the increase of particulate content to 0.6 vol.% then decreased, with better properties observed in 83% rolling reduction samples.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Nanoscience & Nanotechnology
Shan Jiang, Qi An, Xiping Cui, Xuelian Xiang, Lujun Huang, Rui Zhang, Yuan Sun, Lin Geng
Summary: In this study, a series of Ti matrix composites were successfully fabricated by adding ZrB2 and Si elements, which significantly improved the tensile strength and creep resistance. Particularly at high temperatures, the mechanical properties of the composites were greatly enhanced.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Nanoscience & Nanotechnology
Xiaotong Pang, Zhihui Xiong, Shilong Liu, Junhao Sun, R. D. K. Misra, H. Kokawa, Zhuguo Li
Summary: Significant grain refinement of beta grains in metastable beta TB2 titanium alloy was achieved through the minor addition of zirconium diboride during laser melting deposition. The addition of 0.5 wt% ZrB2 resulted in smaller beta grains and improved mechanical properties, including higher ultimate tensile strength and ductility.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Engineering, Multidisciplinary
Cheng Kui, Zhang MingBo, Song Hao, Liu XinWang, Fan ZiTian, Wang GuiLan, Zhang HaiOu
Summary: This study explores the use of synchronous microrolling (HDMR) to address the problems of coarse columnar grains, inhomogeneous microstructure, and anisotropic mechanical properties in Ti-6Al-4V manufactured by wire and arc additive manufacturing (WAAM) and hybrid additive manufacturing with plasma-arc deposition. HDMR significantly refines the grains and improves isotropy, leading to better tensile properties in titanium alloys.
SCIENCE CHINA-TECHNOLOGICAL SCIENCES
(2022)
Article
Chemistry, Physical
M. H. Khan, A. Das, Z. Li, H. R. Kotadia
Summary: The effects of adding iron, manganese, and Al-5Ti-1B grain refiner on the solidification microstructures of 6082 alloy under different cooling rates were studied. It was found that iron and manganese can promote the refinement of primary-Al grains, but also increase the content of intermetallics, while Al-5Ti-1B grain refiner can effectively refine primary-Al grains and improve the microstructure by enhancing the nucleation of intermetallics and restricting their growth.
Article
Materials Science, Multidisciplinary
Ahmed S. J. Al-Zubaydi, Nong Gao, Jan Dzugan, Pavel Podany, Sandeep Sahu, Deepak Kumar, Ying Chen, Philippa A. S. Reed
Summary: The tensile properties of an ultrafine-grained Al-9%Si-3%Cu alloy deposited by the laser powder bed fusion process were investigated in this study. The processed alloy exhibited higher strength and elongation, and the room temperature processing improved the microstructure of the alloy.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Daoxiu Li, Kai Zhao, Mengxia Han, Guiliang Liu, Qianqian Sun, Sida Liu, Xiangfa Liu
Summary: This study systematically investigates the effects of C-doped (C-TiB2) particles on the microstructure and properties of Al-Si-Mg-Mn alloys. The results show that C-TiB2 particles can refine the grain size, inhibit grain size instability, refine the size of precipitates, improve the dislocation density, and change the grain orientation, leading to significant enhancements in yield strength and elongation.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Omid Sadeddin, Mohammad Moazami-Goudarzi, Mohammad Javad Nayyeri
Summary: The study revealed that Zr addition and extrusion ratio had significant effects on the microstructure and mechanical properties of Mg-5Sn alloy. Addition of Zr improved the thermal stability of the alloy, while hot extrusion enhanced both strength and ductility of the alloy.
METALS AND MATERIALS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Santanu Mondal, Juan Diego Shiraishi Lombard, Sreenivasulu Gollapudi, Carolina Tallon, Jie-Fang Li, Dwight Viehland
Summary: Ultrafast high-temperature sintering (UHS) is an effective method for rapidly densifying ZrB2 powders. The final grain size increases with longer sintering duration. X-ray diffraction and energy-dispersive spectroscopy show crystalline phase and compositional uniformity in ZrB2 after UHS.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Multidisciplinary Sciences
Carlos Jr. Narducci, Gabriela Lujan Brollo, Rafael Humberto Mota de Siqueira, Andre Silva Antunes, Antonio Jorge Abdalla
Summary: This study analyzed the effects of adding grain refiner Nb+B to Al alloys on the morphology and size of beta-Fe precipitates. The results showed that the addition of Nb+B significantly changed the size and morphology of the precipitates, making them notably refined and spheroidized.
SCIENTIFIC REPORTS
(2021)
Article
Materials Science, Multidisciplinary
Husain Mehdi, R. S. Mishra
Summary: By utilizing multipass friction stir processing (MPFSP), the present work achieved homogeneously disseminated ZrB2 reinforcement particles and a very fine grain structure in AA6082. The influence of ZrB2 on the microstructure and tensile properties of MPFSP was observed. The study found that ZrB2 successfully shattered coarse dendrite clusters, resulting in a uniform microstructure. Additionally, ZrB2 particles inhibited grain boundary migration and led to a reduction in grain size and HAGBs fraction.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2023)
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
Materials Science, Multidisciplinary
T. J. Chen, X. K. Yang, H. Xue, G. L. Bi, X. Z. Zhang, R. G. Guan
Summary: In this study, a controlled diffusion solidification (CDS) process with simultaneous mixing of two precursor melts was proposed. The effects of mixing rate on the microstructure were studied through simulation and experiments. The results showed that increasing the mixing rate can improve the blending result and achieve a microstructure with small nondendritic or spheroidal grains.
JOURNAL OF MATERIALS SCIENCE
(2022)
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
Ziyuan Zhao, Daoxiu Li, Dongqing Zhang, Guiliang Liu, Sida Liu, Xiangfa Liu
Summary: This study reports a novel method of introducing C-doped TiB(2) particles into Al-Si-Mg alloy, significantly improving grain refinement and mechanical properties. The C-doped TiB(2) particles exhibit excellent nucleation capability, solving the problem of grain refinement caused by Si poisoning, and enhancing the alloy's strength-ductility synergy.
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)