Article
Chemistry, Physical
Mekala Chinababu, Nandivelegu Naga Krishna, Katakam Sivaprasad, Konda Gokuldoss Prashanth, Eluri Bhaskara Rao
Summary: Aluminum matrix composites reinforced by CoCrFeMnNi high entropy alloy particulates were fabricated using the stir casting process. The influence of different alloy content on the mechanical properties of the composites was investigated. The results showed that the reinforcement particles were uniformly distributed in the aluminum matrix without the formation of intermetallic phases at the interface. With the increase in high entropy alloy content, the hardness and tensile strength of the composites increased while the elongation decreased.
Article
Chemistry, Physical
Gang Chen, Tao Luo, Shucheng Shen, Jixiang Zheng, Xiaotian Tang, Tao Tao, Wei Xue
Summary: A new preparation method for W/FeNiMnAlW high-entropy alloy matrix composites was presented, showing superior mechanical properties due to the effective combination of FCC phase and ordered BCC phase, as well as the uniform distribution of W particles with good metallurgical bonding.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Yusheng Tian, Wenzhe Zhou, Mingxu Wu, Hua Luo, Qingbiao Tan, Guoliang Zhu, Anping Dong, Da Shu, Baode Sun
Summary: Refractory high entropy alloy TiZrHfNbTa matrix composites reinforced with in-situ nitrides were prepared by vacuum arc melting. The composites showed enhanced strengths both at room temperature and high temperature, and the strength increased with the increment of N content.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Engineering, Mechanical
Pradip Kumar Verma, Alok Singh
Summary: This study investigates the mechanical properties and wear resistance of CoMoMnNiV high entropy alloy reinforced aluminium matrix composite processed through stir-squeeze casting assisted with an ultrasonic transducer. The results show significant improvements in mechanical properties and wear resistance, with the composite containing 8 wt% HEA demonstrating the highest resistance to wear. Optical microscopy, SEM, and an optical profilometer were used for a thorough examination of the microstructure and worn surface.
TRIBOLOGY INTERNATIONAL
(2024)
Article
Chemistry, Physical
Chenmeng Zhao, Heguo Zhu, Zonghan Xie
Summary: By in-situ addition of Ti and C into the Fe1.2MnNi0.8Cr high-entropy alloy matrix, TiC particles were produced and extra solid-solution effect was introduced to strengthen the matrix, resulting in improved mechanical properties of the composites.
Article
Materials Science, Multidisciplinary
Yuanchun Huang, Jinchuan Wen, Yu Liu, Yongxing Zhao
Summary: In this study, an Al70Zn10Mg10Cu5Si5 medium entropy alloy was prepared by electromagnetic stirring casting for the first time. It was found that the electromagnetic frequency significantly affected the content, distribution, and morphology of the alloy phases. The alloy fabricated with a specific electromagnetic frequency showed improved mechanical properties, including hardness, strength, and plasticity.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Composites
Ammar Mustafa, Bandar Aloyaydi, Sivsankaran Subbarayan, Fahad A. Al-Mufadi
Summary: The study focused on utilizing additive manufacturing technology to develop multi-material components with different structures. Mechanical properties were evaluated through compression, bending, and tensile tests, showing that incorporating 5% volume of glass fibers (MGFs) in the TMS resulted in significantly improved performance. Cone-beam CT scan and high-resolution scanning electron microscope were used to observe voids and microstructural evolution in the developed materials.
POLYMER COMPOSITES
(2021)
Article
Materials Science, Multidisciplinary
Yan Ma, Keliang Qiu, Ning Xu, Chengpeng Yang, Jiabao Zhang, Zihao Zhang, Qingsong Deng, Yonghai Yue, Lihua Wang, Xiaodong Han
Summary: The deformation of a single-crystal Fe48Mn32Co10Cr10 alloy was observed at the atomic scale, and it was found that full and partial dislocations, along with deformation twins, were involved in the deformation process. These dislocations interacted with twin boundaries, resulting in high strength and remarkable strain hardening.
MATERIALS RESEARCH LETTERS
(2023)
Article
Chemistry, Physical
K. S. Chung, P. M. Yiu, T. F. Hung, C. H. Shek
Summary: In this study, high nitrogen content was successfully dissolved in Cantor alloy and Cr2N precipitates were found after aging. The alloy showed significant increase in hardness and yield strength after aging treatment.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Nanoscience & Nanotechnology
Chengbin Wei, Yiping Lu, Xinghao Du, Jun Wang, Tongmin Wang
Summary: Nonequiatomic Co29Cr29Fe29Ni12.5W0.5 high-entropy alloys exhibited outstanding mechanical properties after annealing at 725 degrees C, attributed to the addition of the W element and ultrafine grain structure. Dislocation slip, stacking faults, and nano-twins governed the deformation mechanism in the annealed alloy.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Nanoscience & Nanotechnology
Chengbin Wei, Yiping Lu, Xinghao Du, Jun Wang, Tongmin Wang
Summary: The high-entropy alloys Co29Cr29Fe29Ni12.5W0.5 prepared by vacuum induction melting and mechanical processing exhibited outstanding mechanical properties with a yield strength of 1.13 GPa and fracture elongation of 24.3% after annealing at 725 degrees C. The addition of W element and ultrafine grain structure were attributed to the excellent mechanical properties observed in the alloy.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Review
Materials Science, Composites
Zeeshan Ahmad, Sabah Khan
Summary: Aluminium alloy LM 25 based composites reinforced with boron carbide at different weight fractions of 4%, 8%, and 12% were fabricated using stir casting technique. Microstructural analysis showed homogenous dispersion of reinforcement particles in the matrix, with some clustering observed in composites with 12% wt. of boron carbide. The mechanical characterization revealed an increase in hardness and tensile strength as the percentage of boron carbide particles reinforcement increased, with a fractured surface mapping performed for all composites.
JOURNAL OF COMPOSITE MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Chengbin Wei, Yiping Lu, Xinghao Du, Tingju Li, Tongmin Wang, Peter K. Liaw
Summary: The non-equiatomic Co29Cr29Fe29Ni12.5W0.5 high-entropy alloy exhibited exceptional strength-ductility synergy at cryogenic temperatures, with significant increase in yield strength and outstanding ductility. The microstructure transformed to a hexagonal-close packed phase at low temperatures, contributing to the high mechanical properties observed.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Engineering, Manufacturing
Renke Li, Zhiyu Liu, Rong Chen, Shaoyun Guo
Summary: By adding a water-soluble precursor of polyimide (PI) into the PTFE aqueous emulsion, a well-distributed PI microphase was formed in the PTFE matrix during the sintering process, leading to significant improvements in the tensile strength, stiffness, and creep resistance. The PTFE/PI film showed increased tensile strength and Young's modulus by 28.1% and 122.3% respectively, decreased creep strain by 42.4%, and maintained high elongation at break, low dielectric constant and loss, making it suitable for high-frequency communication.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2023)
Article
Crystallography
Yue Wu, Siwei Luo, Jiawei Wu, Baisong Guo, Zhenggang Wu, Biao Chen, Zhentao Yu, Zhiguo Zhang, Wei Li
Summary: This study systematically investigated the effects of CrCoNi medium entropy alloy (MEA) reinforcement on the mechanical properties and friction resistance of aluminum matrix composites. The results showed that the CrCoNi MEA can effectively improve the mechanical properties of the composites and enhance their wear resistance.
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)