Article
Materials Science, Multidisciplinary
Ka Gao, Junliang Zhao, Wei Zhao, Chunyang Ren, Qingquan Kong, Zhenxia Duan, Linan An
Summary: In this study, the 90 W-7Ni-3Fe refractory alloy was sintered and obtained using hot oscillatory pressure (HOP) method at different sintering pressures. The HOPed alloys exhibited a two-phase composition and showed improved microstructure uniformity with increasing sintering pressure. Higher oscillatory pressure resulted in faster densification rate, shorter sintering time, and smaller grain size in the HOP-40 sample. The higher sintering pressure also induced the formation of dislocation lines and arrays, confirming the plastic deformation mechanism. Furthermore, the HOP-40 sample had the highest Vickers hardness and low corrosion current density, indicating enhanced hardness and corrosion resistance.
Article
Chemistry, Physical
Ping Li, Ruidi Li, Haiou Yang, Tiechui Yuan, Pengda Niu, Minbo Wang, Lanbo Li, Chao Chen
Summary: Selective laser melting (SLM) of Al-3.48Cu-2.03Si-0.48Sc-0.28Zr alloy was systematically investigated in this work, showcasing a strong correlation between specimen density and laser parameters, along with the influence of laser energy input on pore formation and initiation of microcracks. The microstructure of the printed specimen exhibited grain refinement and lattice distortion, leading to increased tensile strength and elongation. This study provides valuable insights for designing high strength-ductility aluminum alloys for SLM.
Article
Nanoscience & Nanotechnology
X. Cui, S. Zhang, C. H. Zhang, J. Chen, J. B. Zhang, S. Y. Dong
Summary: 24CrNiMo low alloy steels fabricated by selective laser melting showed significantly improved densification level with increasing volumetric energy density. The microstructure mainly consisted of high-containing martensite (M) and low-containing lower bainite (LB), while the grain size and microhardness both increased with the increase in volumetric energy density.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Chemistry, Physical
Xiaoping Liu, Kuaishe Wang, Ping Hu, Xiaomei He, Baicheng Yan, Xuzhao Zhao
Summary: In this study, selective laser melting (SLM) technology was successfully used to prepare Inconel 718 samples, and the influences of different input laser energy density on the samples' properties were explored. It was found that increasing the input laser energy density within a certain parameter range improved the formability, microstructures, and mechanical properties of the printed samples.
Article
Optics
Shuai Huang, Bingbing Sun, Shaoqing Guo
Summary: Selective laser melting was used to fabricate TA15 titanium alloy, and its microstructure and properties were analyzed after heat treatment. The acicular martensite transformed into alpha phases after heat treatment, leading to an increase in elongation. Though the tensile and yield strength decreased, the toughness of the alloy improved as indicated by increased dimple size and depth in the fracture morphology.
OPTICS AND LASER TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Zijian Hu, Zhe Zhao, Xin Deng, Zhongliang Lu, Jianye Liu, Zhi Qu, Feng Jin
Summary: In this study, a cemented carbide with AlSi10Mg alloy binder was fabricated using selective laser melting technology, and the processing parameters were optimized using response surface methodology. The results showed that the alloy had fine grain size and good mechanical properties.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Qiyang Tan, Zhiqi Fan, Xiaoqin Tang, Yu Yin, Gan Li, Danni Huang, Jingqi Zhang, Yingang Liu, Feng Wang, Tao Wu, Xianliang Yang, Han Huang, Qiang Zhu, Ming-Xing Zhang
Summary: The study proposed a novel strategy combining substrate modification and inoculation treatment to successfully fabricate crack-free and dense high-strength 7075 alloy using SLM. This strategy can be implemented for SLM of other engineering alloys, providing a foundation for broadening industrial applications of SLM.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Nanoscience & Nanotechnology
Qiyang Tan, Yu Yin, Zhiqi Fan, Jingqi Zhang, Yingang Liu, Ming-Xing Zhang
Summary: In this study, it was found that adding 0.2-0.5 wt% LaB6 nanoparticles to the selective laser melted AlSi10Mg alloy can significantly refine grain size and homogenize the microstructure, thereby improving the mechanical properties of the alloy. However, increasing the LaB6 addition to 2 wt% did not further refine the grains, but instead weakened the ductility of the alloy.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Nanoscience & Nanotechnology
Tianchun Zou, Siyuan Mei, Minying Chen
Summary: In this study, the Al-4.8Mg-0.82Sc-0.28Zr alloy was fabricated by selective laser melting and its formability, microstructure, precipitation behavior, and mechanical properties were systematically investigated. The results showed that the alloy exhibited good forming quality and excellent mechanical properties under specific process parameters.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Nanoscience & Nanotechnology
Hangyu Yue, Hui Peng, Guohua Fan, Jibang Yang, Hao Chen, Xuewei Fang
Summary: The effects of beam speed on the microstructure, defects, and mechanical properties of Ti-48Al-2Cr-2Nb alloy with nano-Y2O3 addition were studied. The orientation relationship between nano-Y2O3 and the matrix was determined. The Y2O3-bearing TiAl alloys exhibited excellent compressive properties at room temperature, showing potential for applications.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Xu-Han Gu, Tao Lu, Tao Zhang, Wei Guo, Ye Pan, Ting Dai
Summary: The anisotropy of microstructures and mechanical properties of FeCoNiCr0.5 high-entropy alloys prepared by selective laser melting was investigated. It was found that the alloy exhibited different microstructures and mechanical properties in different directions, leading to anisotropic behavior.
Article
Materials Science, Multidisciplinary
Hang-Yu Yue, Hui Peng, Yong-Jun Su, Xiao-Peng Wang, Yu-Yong Chen
Summary: The microstructure and high-temperature tensile properties of a Ti-47Al-2Cr-2Nb alloy fabricated via selective electron beam melting with different hatch spacings were systematically investigated. The alloy showed changes in microstructure and grain morphology with increasing hatch spacing. The alloy fabricated with a spacing of 100 mu m exhibited the highest tensile strengths at both room temperature and 700 degrees C.
Article
Engineering, Manufacturing
Qing Teng, Shuai Li, Qingsong Wei, Yusheng Shi
Summary: The microstructure of nickel-based superalloy Inconel 718 produced by selective laser melting (SLM) has a significant impact on its mechanical properties, with heat treatments leading to changes in tensile strength and elongation. Specific defects and segregation in the microstructure influence the fracture mechanism at high temperature, while anisotropy is observed in the strength and elongation properties due to preferential texture formed during the SLM process.
JOURNAL OF MANUFACTURING PROCESSES
(2021)
Article
Metallurgy & Metallurgical Engineering
Yi Lai, Ying Deng, Xin-wen Zhu, Yi-fan Guo, Guo-fu Xu, Ji-wu Huang, Zhi-min Yin
Summary: A new Al-4.77Mn-1.37Mg-0.67Sc-0.25Zr alloy was prepared using selective laser melting technique, and its microstructure and mechanical properties were investigated. The alloy exhibited relatively stable mechanical properties when the energy density ranged from 104 to 143 J/mm3, with yield strength, ultimate tensile strength, and elongation values of 335-338 MPa, 397-400 MPa, and above 11%, respectively. However, when the energy density exceeded 152 J/mm3, the alloy showed the formation of cavities and cracks, leading to a sharp decrease in elongation. Quantitative calculations revealed that solid solution strengthening, grain boundary strengthening, and precipitation strengthening accounted for 44%, 41%, and 15% of the total strengthening, respectively.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2023)
Article
Biochemistry & Molecular Biology
Bingxian Ou, Lixin Lu, Qinsheng Wang, Qing He, YiLin Xie, Junxia Yan
Summary: Titanium matrix composites reinforced by graphene exhibit excellent mechanical properties, and the addition of graphene nanosheets can improve the microstructure and mechanical properties of the composites.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Engineering, Industrial
Qiao Zhong, Kaiwen Wei, Ziang Lu, Xiaoze Yue, Taoyuan Ouyang, Xiaoyan Zeng
Summary: In this study, the effects of laser focus shift on the formability, microstructure, and mechanical properties of HP-LPBF samples were investigated. The results showed that a suitable laser focus shift could increase the build rate and produce near full-dense samples. It was also found that the surface roughness, melting mode, and mechanical properties of the samples were influenced by the laser focus shift.
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Liu Mengna, Wei Kaiwen, Deng Jinfeng, Huang Gao, Zhong Qiao, Zeng Xiaoyan
Summary: High-power SLM technology can be used to fabricate aluminum alloy liquid cold plates with complex outlines and microchannels. By adjusting the laser volume energy density, a relative density of over 99.5% can be achieved, and the high-power SLM-processed samples exhibit higher mechanical properties to meet the design and forming requirements of liquid cold plates.
LASER & OPTOELECTRONICS PROGRESS
(2021)
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)