Article
Materials Science, Multidisciplinary
Lin Zhang, Minghao Huang, Daoqi Zhang, Engang Wang
Summary: This study investigated the effects of adding different rare-earth elements on the microstructure and mechanical properties of Fe-TiB2 composites. Adding Sm, Y, Gd, Nd resulted in coarsening of TiB2 primary particles and lowering their number density, while reducing eutectic spacing and size of alpha-Fe grains, leading to marginally increased tensile strength and hardness. Adding Ce and La significantly refined TiB2 primary particles and improved mechanical characteristics, with La addition showing the most significant strengthening effects. The La-added specimen exhibited significantly higher ultimate tensile strength and hardness compared to non-RE specimens.
MATERIALS TODAY COMMUNICATIONS
(2021)
Article
Materials Science, Multidisciplinary
Luyao Huang, Yutao Zhao, Xizhou Kai, Rui Cao, Ran Tao, Wei Qian, Chuang Guan
Summary: The addition of Gd in the AA6111 matrix composites played a significant role in promoting the dispersion of nano ZrB2 particles and the formation of equiaxed grains, resulting in improved mechanical properties. The composites with 0.5 wt.% Gd and 2 vol.% ZrB2 displayed the longest flow length of 70 mm and significant increases in yield strength, ultimate tensile strength, and elongation compared to the matrix alloy. Strengthening mechanisms including Orowan strengthening and grain refinement strengthening were comprehensively elaborated in the study.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Materials Science, Multidisciplinary
Guangmin Hu, Yanfeng Han, Wenqi Tang, Dong Li, Hui Xing, Jiao Zhang, Baode Sun
Summary: This study investigated the influence of polycarbosilane (PCS) content on particle reinforced nickel matrix composites (PRNMCs) and proposed a method to determine the suitable addition of polymer. It was found that an intact PRNMCs structure could be obtained with a PCS content of 1.24-8.31 wt%. Increasing PCS content stabilized the amount of amorphous SiO2 particles beneficial to the strength and ductility of Ni-PCS composites, but accelerated the increase in the number and size of lamellar graphite particles harmful to tensile properties.
MATERIALS CHARACTERIZATION
(2023)
Article
Materials Science, Multidisciplinary
Kaiguang Luo, Yuze Wu, Yun Zhang, Gang Lei, Hailiang Yu
Summary: Aluminum matrix composites (AMCs) reinforced by FeCoCrNi high-entropy alloy particles (HEAp) at different weight percentages were prepared using a stir casting process. The mechanical properties of AMCs produced by room temperature rolling (RTR) and cryorolling (CR) were studied. Scanning electron microscopy (SEM) was used to analyze the effect of microstructure on the mechanical properties of the composites. The results showed that CR significantly improved the mechanical properties of HEAp/AMCs due to the volume shrinkage effect, resulting in stronger bonding between the reinforcement and the Al matrix.
Article
Chemistry, Physical
Xinghua Zhu, Zheliang Jiang, Zhou Liu, Ning Wang, Yi Xu
Summary: The introduction of yttrium in Ti6Al4V improves its mechanical properties by deoxidizing the matrix and refining the grain size. This study investigates the effect of yttrium content on the mechanical properties of Ti6Al4V-xY (x = 0, 0.1, 0.3, 0.5, 0.7). The results show that the alloy with 0.1% yttrium has the highest elongation, while the alloy with 0.3% yttrium has the highest tensile strength without significant reduction in elongation. This research provides valuable data and insights for enhancing the mechanical properties of Ti6Al4V with yttrium.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Engineering, Multidisciplinary
ShiXin Li, HongXiang Jiang, YanQiang Li, LiLi Zhang, Hao Sun, Jie He, HaiCang Jiang, JiuZhou Zhao
Summary: The effects of minor Ce addition on the microstructures, tensile properties, and electrical conductivity of Al-Fe alloy were investigated. The results showed that Ce addition led to α-Al refinement, modification of the Al13Fe4 minority phase, and decrease in Si solid solubility. The grain refinement had negligible influence on the tensile strength, while the ductility and conductivity were simultaneously improved. The modification of the Al13Fe4 minority phase improved ductility, and the decrease in Si solid solubility increased electrical conductivity. This study provides a strategy to enhance both tensile properties and electrical conductivity of aluminum alloy.
SCIENCE CHINA-TECHNOLOGICAL SCIENCES
(2023)
Article
Materials Science, Ceramics
Shuqi Guo, Gaku Okuma, Kimiyoshi Naito, Hideki Kakisawa
Summary: In this study, TaB2-SiC composites with and without rare-earth oxides were fabricated and the effects of rare-earth oxides on their mechanical properties were investigated. The results showed that the addition of rare-earth oxides improved the sinterability, microstructure, and fracture toughness of the composites, but decreased the shear and Young's moduli as well as the hardness. Additionally, the effects of rare-earth oxides on the strength and toughening of the composites were temperature-dependent.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Multidisciplinary
Fei Cao, Xingde Zhang, Gezhi Dong, Yihui Jiang, Fan Gao, Pengtao Cai, Tongmin Wang, Shuhua Liang
Summary: The effect of Ce content on the microstructures, electrical conductivity, and tensile strength of (TiB2p + TiBw)/Cu composites was studied. It was found that an appropriate amount of Ce can improve the microstructures and properties of the composites, while excessive Ce leads to performance deterioration.
ADVANCED ENGINEERING MATERIALS
(2022)
Article
Chemistry, Physical
Milad Maleki, Hamed Mirzadeh, Massoud Emamy
Summary: The synergistic effects of copper addition and hot extrusion process were studied on the modification of microstructure and enhancement of mechanical properties of a common in situ hypereutectic Mg-Si metal-matrix composite. The results showed that copper addition at a microalloying level of 0.5 wt% effectively modified the microstructure and improved the mechanical properties of the as-cast material. However, higher copper additions led to poor tensile properties due to the deleterious effects of eutectics. The hot extrusion process resulted in fragmentation and dispersion of intermetallics, as well as intense grain refinement by dynamic recrystallization, leading to enhanced mechanical properties of the composites.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Liang Ren, Xiong Zhou, Tong Wang, Yinglong Li, Qichi Le, Qiyu Liao
Summary: This paper demonstrates that some inexpensive rare-earth oxides can replace expensive master alloys for material preparation by thermodynamic calculations. Low-cost Mg-3Y-1La2O3, Mg-3Y-1CeO2, Mg-3Y-1Sm2O3, and Mg-3Y-1Gd2O3 composites were prepared and showed good particle-matrix interface relationship. The in-situ Mg17La2 played a key role in improving mechanical properties, and the ultimate tensile strength of Mg-3Y-1La2O3 composite was 55.1 MPa higher than that of Mg-3Y alloy. The strengthening mechanism can be attributed to the load transfer and coefficient of thermal expansion (CTE) of the Mg17La2.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Composites
John Otieno Odhiambo, Motoshi Yoshida, Akira Otsu, Li-Fu Yi, Tetsuhiko Onda, Zhong-Chun Chen
Summary: In this study, aluminum-matrix composites with submicron-sized ceramic particle reinforcement were synthesized and densified through reactive sintering and hot-extrusion processes. The reaction mechanisms, extrusion behavior, microstructure, and tensile properties of the composites were investigated. It was found that hot-extrusion was an effective method to densify the reactive-sintered porous composites, resulting in dense composites with improved yield and tensile strength. The presence of submicron hybrid ceramic particles enhanced the mechanical properties of the composites.
JOURNAL OF COMPOSITE MATERIALS
(2022)
Article
Chemistry, Physical
Evgenii Borisov, Anatoly Popovich, Vadim Sufiiarov
Summary: This paper presents the possibility of modifying the properties of Inconel 718 alloy by adding Yttrium in situ during the selective laser melting process. The study found that with an increase in the proportion of yttrium in the alloy, the hardness increases, but the yield strength and tensile strength decrease while the relative elongation increases. Further increase in yttrium content leads to a sharp decrease in the relative elongation and an increase in the yield strength.
Article
Materials Science, Multidisciplinary
Qiang Chen, Haoyu Geng, Hongming Zhang, Xin Li, Gang Chen
Summary: The TiB2.TiAl3/2024Al composite was processed by multidirectional forging (MDF) and the effects of MDF temperature and pass number on the microstructure and mechanical properties were studied. The MDF temperature and pass number affected the grain size, grain boundaries, tensile strength, and elongation of the composite. During the MDF process, TiAl3 and TiB2 particles fractured and deformed, and dynamic recrystallization occurred. The strengthening mechanism of the composite was quantitatively analyzed, showing that the load transfer effect and thermal expansion mismatch effect partially counteracted the grain refinement effect on strength enhancement.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
Fei Cao, Xingde Zhang, Yihui Jiang, Pengtao Cai, Qian Li, Tongmin Wang, Gezhi Dong, Fan Gao, Shuhua Liang
Summary: The study successfully improved the tensile strength of (TiB2p + TiBw)/Cu composites by adding rare earth elements, and investigated the size, distribution, and morphology of the reinforcements as well as the strengthening mechanism and failure behavior of the composites. Results showed that rare earths could refine the particles and whiskers, leading to an increase in tensile strength of the composites.
MATERIALS CHARACTERIZATION
(2022)
Article
Polymer Science
Qiaoyu Wang, Jianbin Wang, Anheng Wang, Chaoqun Zhou, Jiale Hu, Fei Pan
Summary: This study aims to analyze the effects of temperature and strain rate on the tensile properties of long glass fiber-reinforced polypropylene composites. The experimental results show that both tensile strength and tensile fracture stress increase significantly at a temperature of 25°C and strain rates of 10(-4), 10(-3), 10(-2), and 10(-1) s(-1). On the other hand, these properties decrease significantly when the strain rate is fixed at 10(-4) while temperatures range from -25°C to 75°C. Cracks appear on the fracture surface at lower temperatures, while matrix softening occurs at higher temperatures. These findings emphasize the significant influence of both strain rate and temperature on high fiber content long glass fiber-reinforced polypropylene composites.
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)