Article
Chemistry, Physical
Z. Delbari Ragheb, S. G. Shabestari, Y. Najafi
Summary: This study investigates the influence of the thixoforming process on the microstructure and mechanical properties of modified and grain refined 319 aluminum alloy. The strain-induced melt activated (SIMA) process is used to achieve suitable microstructure for semi-solid processing. Thixoforming eliminates defects and produces a spherical structure with enhanced mechanical properties. The hardness and tensile strength, yield strength, elongation, and toughness of the alloy are significantly improved after thixoforming compared to the as-cast state.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Yuanxiao Dai, MengHan Xiao, Yaobo Hu, Yan Yang, Bin Jiang, Tianxu Zheng, Li Dong, Baoqing Yang, Changyong Zheng
Summary: By designing extrusion parameters, the Mg-0.12Ca-0.08Ba alloy underwent grain refinement and texture control, resulting in the best performance of the extruded samples with different crystallographic orientations.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
S. Samat, M. Z. Omar, A. H. Baghdadi, I. F. Mohamed, A. Rajabi, A. M. Aziz
Summary: Al-Si-Cu-Mg foundry alloys are used in casting process technologies, but their strength properties can be improved through different casting methods. Thixoforming and heat treatment can enhance microstructural refinement and increase strength, while gravity casting and rheocasting may lead to brittle failure.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Article
Nanoscience & Nanotechnology
Umer Masood Chaudry, Yeonju Noh, Gukin Han, Russlan Jaafreh, Tea-Sung Jun, Kotiba Hamad
Summary: This study investigates the effects of CaO additions on the microstructure, texture, and mechanical properties of AZ61 magnesium alloy. The addition of CaO leads to the formation of Ca-rich intermetallic compounds and influences the evolution of the alloy's structure. Additionally, the alloys containing CaO exhibit twined structures, with an increased fraction of tension twins as the amount of CaO increases.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Chemistry, Physical
Jiri Kubasek, Jan Pinc, Klara Hosova, Marketa Strakova, Orsolya Molnarova, Jan Duchon, David Necas, Miroslav Cavojskyc, Michal Knapek, Matjaz Godec, Irena Paulin, Dalibor Vojtech, Jaroslav Capek
Summary: This paper investigates the effects of extrusion temperature and ratio on the microstructure and mechanical properties of Zn-0.8Mg-0.2Sr alloy. The results show that the grain size, material texture, and dislocation substructures have a significant influence on the alloy's elongation range and anisotropy. Under appropriate extrusion conditions, the alloy's mechanical properties can be greatly improved.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Chuan Xu, Xinjian Yuan
Summary: High frequency ultrasonic vibration was used for arc welding of MB3 Mg alloy to improve welding defects and microstructure issues. By optimizing experimental parameters, Mg alloy joints with favorable mechanical properties were obtained. However, excessive ultrasonic power could degrade tensile strength.
Article
Materials Science, Multidisciplinary
Saziana Samat, Mohd Zaidi Omar, Amir Hossein Baghdadi, Intan Fadhlina Mohamed, Ahmad Muhammad Aziz
Summary: A modified Al-Si-Cu alloy was developed for the fabrication of automotive connecting rods, showing good filling capability and improved mechanical properties during the thixoforming process. The microstructures were refined and the mechanical properties were significantly enhanced after thixoforming and T6 heat treatment.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Materials Science, Multidisciplinary
Joung Sik Suh, Byeong-Chan Suh, Jae Ok Choi, Young Min Kim, Bong Sun You
Summary: This study investigates the effect of extrusion temperature on room temperature tensile properties of as-extruded AZ91 plates regarding microstructure and texture development. The research reveals that, contrary to expectations, yield strength increases with extrusion temperature despite an increase in grain size. Stronger basal texture was found to play a dominant role in increasing yield strength.
METALS AND MATERIALS INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Guanfei Xiao, Jufu Jiang, Ying Wang, Yingze Liu, Ying Zhang
Summary: Thixoforming of nickel-based superalloy GH4037 parts was successfully conducted, with investigations on the effects of forming temperature, soaking time, and dwell time on microstructure and mechanical properties. The best mechanical properties were achieved at 1380 degrees C for 30 min. Dwell time had minimal impact on the properties of the parts.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Nanoscience & Nanotechnology
Zhiyu Chang, Qingchen Deng, Qiao Lan, Jian Feng, Daquan Li, Baoliang Liu, Yujuan Wu, Liming Peng, Wenjiang Ding
Summary: This study characterized and analyzed the microstructure and mechanical properties of Mg alloy castings prepared by rheo-diecasting and compared them with conventional diecasting. The solution-treated rheo-diecast alloy showed a significant improvement in elongation but a decrease in room-temperature tensile mechanical properties.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Nanoscience & Nanotechnology
H. Miura, P. L. Khoo, M. Kobayashi
Summary: This study utilized extremely high-pressure forging conditions to refine the grain and improve the mechanical properties of magnesium AZ80 alloy by forming mechanical twins and texture strengthening. The hardness, yield strength, and ultimate tensile strength of the material were notably enhanced with increasing forging stress.
SCRIPTA MATERIALIA
(2023)
Article
Nanoscience & Nanotechnology
Zhao Yang, Chao Xu, Taiki Nakata, Shigeharu Kamado
Summary: This study investigated the effect of extrusion parameters on the microstructural evolution and tensile properties of a Mg-8.0Gd-4.0Y-1.0Mn-0.4Sc alloy. Different DRX mechanisms, such as DDRX and CDRX, were identified, and the alloy with larger extrusion ratio exhibited smaller DRXed grains and a high number of fine precipitated particles. The alloy extruded at 400°C and ratio of 20:1 showed superior strength, while alloy extruded at 450°C and ratio of 10:1 exhibited higher elongation to failure. The enhanced strength was attributed to strong basal texture, refined DRXed grains, and dense distribution of fine particles.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Chemistry, Physical
Xinsheng Huang, Mingzhe Bian, Isao Nakatsugawa, Yasumasa Chino, Masahiko Sato, Kazumasa Yamazaki, Futoshi Kido, Hironori Ueda, Masashi Inoue
Summary: The study found that increasing the manganese content can significantly enhance the yield strength of Mg-3Zn-0.5Ca-0.5Al-xMn alloy, but further increasing to 1.5 wt% manganese content does not contribute to further strengthening. However, the alloy with 1 wt% manganese added achieved high strength, high formability, and improved thermal conductivity.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Nanoscience & Nanotechnology
Furong Cao, Chaofeng Sun, Huihui Shang, Chao Xiang, Renjie Liu
Summary: A new Mg-Li-Al-Zn-Y alloy was prepared by MDFR to enhance strength and ductility, exhibiting improved mechanical properties with optimized microstructure. The alloy showed a bimodal microstructure after MDFR treatment, contributing to enhanced strength and ductility, while XRD and TEM analysis confirmed the presence of specific phases and compounds.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Chemistry, Physical
Yuanke Fu, Liping Wang, Sicong Zhao, Yicheng Feng, Lei Wang
Summary: This study investigated the effects of Al content on the microstructure evolution and mechanical properties of as-cast Mg-11Gd-2Y-1Zn alloy. The results showed changes in microstructure and mechanical properties with increasing Al content, with specific improvements seen at 1wt.% and 3wt.% Al additions.
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)