Article
Materials Science, Multidisciplinary
Yinling Jin, Hongze Fang, Shu Wang, Ruirun Chen, Yanqing Su, Jingjie Guo
Summary: The addition of Eu can modify the eutectic Mg2Si phase, improving the mechanical properties of near-eutectic Al-Mg2Si alloys. Tensile properties are significantly enhanced when the Eu content is 0.05%, but they decrease with further increasing Eu content, indicating an over-modification effect.
ADVANCED ENGINEERING MATERIALS
(2021)
Article
Metallurgy & Metallurgical Engineering
Xiao-lin Zhang, Jia-hao Liu, Wen-shu Li, Hai-tao Zhou, Shun-cheng Wang
Summary: The effects of Sr-Ce addition on the structure and properties of A356 aluminum alloy have been studied. It has been found that the addition of Sr-Ce reduces the average secondary dendrite arm spacing in the original matrix phase. The iron-rich phase undergoes a transformation in structure, and the addition of Ce leads to the transformation of the beta-Al5FeSi phase into pi-Al8Mg3FeSi6. The best modification effect is achieved when the Ce content is 0.06%.
INTERNATIONAL JOURNAL OF METALCASTING
(2023)
Article
Chemistry, Physical
Xinyi Hu, Dongfu Song, Huiping Wang, Yiwang Jia, Haiping Zou, Mingjuan Chen
Summary: Ultrasonic treatment has significant effects on the structure and properties of the A356 alloy, including the refinement of alpha-Al grains and reduction of eutectic Si branch diameter, leading to improved tensile strength, elongation, and plasticity.
Article
Chemistry, Physical
Wei Li, Ge Zhang, Congcong Cui, Jianxun Bao, Conghui Guo, Chuanxiang Xu, Wei Zhang, Wanli Zhu
Summary: In this study, the properties of RB-SiC were improved by impregnating a composite precursor into a porous preform. The introduction of multiphase carbon into the preforms was found to control the reaction process between liquid Si and carbon, regulating the microstructure and properties of RB-SiC.
Article
Materials Science, Multidisciplinary
Surajit Basak, Prosanta Biswas, Surajit Patra, Himadri Roy, Manas Kumar Mondal
Summary: The effects of adding various amounts of Al-5Ti-1B master alloy on the microstructure and properties of Al-12.6Si alloy were studied, showing improvements in hardness, UTS, and elongation. This was attributed to the modification of microstructure caused by the addition of the master alloy.
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Yinling Jin, Hongze Fang, Shu Wang, Ruirun Chen, Yanqing Su, Jingjie Guo
Summary: By adding Eu, the morphology of the primary Mg2Si phase in Al-18Mg(2)Si composites was modified and the size was refined, leading to an improvement in mechanical properties. However, excessive Eu content may cause over-modification.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
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
Peng Lian, Hongkui Mao, Qi Wei, Ruilin Ma, Cong Li, Hong Xu
Summary: The effects of different content of Sr and Sc on the microstructure, mechanical properties and corrosion resistance of an Al-7Si alloy were investigated. The presence of Sc in the Sr-modified Al-Si alloy resulted in multiple types of eutectic Si morphologies. The modification of eutectic Si improved the yield strengthen and elongation of Al-7Si alloys, but lead to the increase of boundaries between α-Al and eutectic Si particles, which caused decrease of corrosion resistance and polarization resistance. The incomplete modification offered a possibility to satisfy the require that a compromise between mechanical properties and corrosion resistance. The relationship between the content of Sr and Sc and the morphologies of eutectic Si in the alloy was also summarized.
Article
Materials Science, Multidisciplinary
Wenduan Yan, Gaosheng Fu, Yanhua Xu, Wanqing Lai, Hongling Chen
Summary: An effective integration of purification and modification has been used for casting A356 Al alloy, resulting in excellent purification and improved mechanical properties. The addition of 0.012 w/% Sr leads to fine, diffusely distributed eutectic silicon grains in the alloy, which exhibit significant enhancements in tensile strength and elongation.
MATERIALI IN TEHNOLOGIJE
(2021)
Article
Materials Science, Multidisciplinary
Shuai Pan, Yan Liu, Bowei Yang, Ying Fu, Minqiang Gao, Renguo Guan
Summary: An effective method was proposed to purify aluminum alloy melt under stirring and vacuum, and the formation mechanism of pore defects and their effects on the mechanical properties of A356 alloy were investigated. The results showed that the purification parameters had crucial effects on determining the size of dendrites and pores, and the optimized stirring speed and stirring temperature were determined. The microstructure and mechanical properties of the purified alloy were improved due to the bubble breakup mechanism and the interaction between pore and solidified microstructure.
Article
Engineering, Multidisciplinary
LingKun Zhang, MingLiang Wang, Rui Huang, XiaoHu Chen, Zheng Ren, Tao He, YiPing Lu
Summary: Adopting the idea of thermal modification of conventional Si-containing eutectic alloys, this study aimed to improve the fracture plasticity of the brittle CoFeNi2(Ti3Si5)(0.16) high-entropy alloy by heating it under various annealing conditions. The result showed that the eutectic microstructure transformed from lamellar + network morphologies to granular + irregular morphologies after annealing. The resulting alloy exhibited excellent mechanical properties, including an ultimate compressive strength of 1980 +/- 50 MPa, fracture plasticity of similar to 16.6% +/- 1%, and hardness of similar to 448 +/- 15 HV.
SCIENCE CHINA-TECHNOLOGICAL SCIENCES
(2023)
Article
Chemistry, Physical
Won-hyuk Lee, Yeonju Oh, Min-Gu Jo, Heung Nam Han, Yanghoo Kim
Summary: The effects of Nb content on microstructures and mechanical properties in Co-free CrFeNi2Nbx alloys were investigated. Increasing Nb content led to changes in microstructures and improved mechanical properties, with a reduction in ductility. The CrFeNi2Nb0.6 alloy achieved a high maximum fracture strength.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Peerawit Chokemorh, Phromphong Pandee, Suwaree Chankitmunkong, Ussadawut Patakham, Chaowalit Limmaneevichitr
Summary: In this study, the refinement mechanism of primary and eutectic Si morphologies in hypereutectic Al-Si alloys was investigated by adding P and Ce. It was found that the addition of P-Ce significantly refined the primary and eutectic Si morphologies, resulting in increased tensile strength and elongation of the alloy. Furthermore, the wear resistance of the alloy was improved.
MATERIALS RESEARCH EXPRESS
(2022)
Article
Materials Science, Composites
Jing-Jing Lu, Yi-Cheng Shi, Rui-Qiong Dang, Ji-Peng Guan, Li-Chao Yu, Huan Xu, Zhen-Guang Wang, Hong-Quan Wang, Fan Lu, Xiao-Jun Shen
Summary: In this study, silicone polymer (PSOL)/carbon fiber (CF)/epoxy (EP) composites were prepared by adding PSOL as interfacial modifiers in CF/EP composites. The mechanical and dynamic mechanical properties of the composites were investigated, and the optimal content of PSOL modification was determined. The addition of PSOL improved the interfacial bonding ability between CF and the matrix, resulting in increased interlaminar shear strength, tensile strength, elongation at break, and flexural strength of the PSOL/CF/EP composites by 23.28%, 18.49%, 38.45%, and 11.23%, respectively. Furthermore, the thermal stability of the composite was preserved after the PSOL modification.
POLYMER COMPOSITES
(2023)
Article
Materials Science, Multidisciplinary
H. M. Wang, K. Li, G. R. Li, W. X. Su, S. S. Chou, T. T. Wu, X. Fan
Summary: The effect of DCT time on the microstructure and mechanical properties of spinning deformed A356 alloy subject to solution-DCT-aging multiplex heat treatment was studied. The best DCT time is 36 h, which is the critical time for the recrystallization process. After 36 h DCT, the alloy exhibits improved tensile strength, yield strength, elongation, and microhardness. Short-term DCT increases residual stress and dislocation density, while long-term DCT has the opposite effect.
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)