Article
Metallurgy & Metallurgical Engineering
Fei Xiao, Ming-xu Wu, Yi-xiao Wang, Wen-zhe Zhou, Shu-bin Wang, Dong-hong Wang, Guo-liang Zhu, Michael Jiang, Da Shu, Jia-wei Mi, Bao-de Sun
Summary: The effect of boron content on grain refinement of commercially pure aluminum by Al-5Ti-1B was quantitatively assessed. It was found that the refining performance of Al-5Ti-1B gradually weakened as the boron content increased below 0.03 wt.%, while it gradually recovered and enhanced when the boron content exceeded 0.03 wt.%. This can be attributed to the reaction of boron with the Al3Ti interlayer on TiB2 and the formation of primary AlB2 particles.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2022)
Article
Materials Science, Multidisciplinary
Ying Dong, MingJie Wang, GuoWei Zhang, Hong Xu
Summary: Al-Ti-C master alloys were fabricated using self-propagating high-temperature synthesis (SHS), and the increase in Ti/C mass ratio resulted in better grain refinement of industrial pure aluminum. Specifically, a Ti/C mass ratio of 4:1 showed optimal refining performance with TiC particles and rod-shaped Al3Ti.
RESULTS IN PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
Cong Xu, Wen-Long Xiao, Shi-Zhen Wen, Yue-Jun Zhen, Chao-Li Ma
Summary: The Al-5Ti-0.5B-0.5C grain refiner prepared by powder metallurgy effectively reduces the grain size of commercially pure aluminum. The grain refinement efficiency is slightly affected by the duration of the grain refiner in the melt, and the high stability, proper size, and high density of Al3Ti, TiB2, and TiC particles are the main factors contributing to the grain refinement.
Article
Materials Science, Multidisciplinary
Jee Seok Choi, Moonwoo La, DongEung Kim, Kyeong-Hwan Choe, Soong-Keun Hyun, Moon-Jo Kim
Summary: The effect of electric current on the refinement of pure aluminum during solidification was investigated in this study. It was found that electric current can significantly alter the grain morphology and reduce grain size. The grain refinement is influenced by electrical conditions such as the intensity and duration of applied electric current, but under extreme conditions, the refining effect may disappear.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Materials Science, Multidisciplinary
Tong Liu, Maoliang Hu, Qingyu Ran, Bo Jiang, Zesheng Ji, Xiaobing Zhou
Summary: A novel aluminum alloy refining agent was prepared using materials generated during a machining process, and the effect of temperature and time on the second phase was investigated. The results showed that the refining agent could effectively decrease the grain size of aluminum alloy and increase its tensile strength.
Article
Materials Science, Multidisciplinary
Maoliang Hu, Fei Wang, Bo Jiang, Huasheng Wang, Yile Liu, Zesheng Ji
Summary: The Al-5Ti-1B grain refiner was successfully prepared by reacting Ti chips with KBF4 in pure aluminum melt. The use of prefabricated blocks was found to provide the best refining performance, resulting in the formation of TiB2 and TiAl3 as effective heterogeneous nuclei. Additionally, the reaction time significantly affects the dissolution process of Ti chips and the size of TiAl3.
METALS AND MATERIALS INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
Tong Liu, Maoliang Hu, Fei Wang, Bo Jiang, Zesheng Ji
Summary: In this study, the effects of reaction temperature and time on the microstructure and refinement effect of Al-5Ti-0.25C-1Ce alloy were systematically investigated. The best preparation process was found to be holding at 1273K for 80 minutes. Additionally, a specific matrix equation was used to obtain TiC crystal planes or directions parallel to certain crystal planes or directions of α-Al.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Daoxiu Li, Kai Zhao, Mengxia Han, Guiliang Liu, Qianqian Sun, Sida Liu, Xiangfa Liu
Summary: This study systematically investigates the effects of C-doped (C-TiB2) particles on the microstructure and properties of Al-Si-Mg-Mn alloys. The results show that C-TiB2 particles can refine the grain size, inhibit grain size instability, refine the size of precipitates, improve the dislocation density, and change the grain orientation, leading to significant enhancements in yield strength and elongation.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
T. J. Chen, X. K. Yang, H. Xue, G. L. Bi, X. Z. Zhang, R. G. Guan
Summary: In this study, a controlled diffusion solidification (CDS) process with simultaneous mixing of two precursor melts was proposed. The effects of mixing rate on the microstructure were studied through simulation and experiments. The results showed that increasing the mixing rate can improve the blending result and achieve a microstructure with small nondendritic or spheroidal grains.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
J. Wan, B. Chen, J. Shen, W. Shi, K. Kondoh, S. Li, J. S. Li
Summary: The study demonstrates the fabrication of dual-textured Ti extrudates by manipulating the hot extrusion temperature, revealing different crystallographic textures along different locations of the extrudates. The last portion of the extrudate contains more interstitial nitrogen and oxygen, resulting in extremely high strength through solid solution strengthening.
MATERIALS & DESIGN
(2022)
Article
Chemistry, Physical
Guowei Zhang, Zhaojie Wang, Jingwei Niu, Hong Xu, Xiaoyan Ren
Summary: The study investigated the effects of Al-Ti-C and La on the fluidity of ZL205A alloy through fluidity tests. The results showed that combined addition of Al-Ti-C and La improved the fluidity of the alloy, with clarified influencing mechanisms through microstructure characterization and DSC testing.
Article
Nanoscience & Nanotechnology
Xinxiang Yu, Wencheng Song, Dandan Shi, Xianli Shi, Xiaoyan Dong, Youzheng Sun, Han Dai
Summary: The addition of a small amount of tin to Al-Cu-Mg alloys can significantly refine and spheroidize solidification phases, reduce the content of Al2Cu, Al2CuMg, and Al7Cu2Fe phases in the interdendritic region. Furthermore, the presence of tin also promotes the formation of Mg2Sn phases to further refine the solidification phases.
Article
Materials Science, Multidisciplinary
Qiang Wang, Kang Zhang, Dong Qiu, Wenjuan Niu
Summary: This study comprehensively investigated the effect of La2O3 addition on the microstructure and mechanical properties of CP-Ti fabricated through SLM, demonstrating that La2O3 can suppress massive phase transformation, refine grain size, and enhance mechanical properties through multiple strengthening mechanisms.
MATERIALS CHARACTERIZATION
(2021)
Article
Engineering, Manufacturing
Guichuan Li, Etienne Brodu, Jeroen Soete, Huiliang Wei, Tingting Liu, Tao Yang, Wenhe Liao, Kim Vanmeensel
Summary: This work describes a systematic alloy design strategy leading to the development of a high strength aluminum alloy suitable for L-PBF. By investigating the compositions of different alloys and their corresponding microstructures, the research shows the potential of rapid solidification during L-PBF for fabricating high-strength lightweight parts. The addition of Zr played a crucial role in refining the grain structure and enhancing the mechanical properties of the alloys.
ADDITIVE MANUFACTURING
(2021)
Article
Materials Science, Multidisciplinary
Siyue Fan, Xuming Guo, Qingwei Jiang, Zhenhua Li, Jing Ma
Summary: This article focuses on a new Al-Cu-Mn-Ti-Zr aluminum alloy fabricated by pulsed gas metal arc additive manufacturing to refine the microstructure and alleviate the mechanical property anisotropy. The investigation shows that T6 heat treatment significantly improves the mechanical properties of the alloy samples, but the formation of pores reduces the elongation.
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)