Article
Metallurgy & Metallurgical Engineering
Tingzhuang Han, Jingfeng Zou, Guangsheng Huang, Lifeng Ma, Chaojie Che, Weitao Jia, Lifei Wang, Fusheng Pan
Summary: In this study, AZ31B Mg alloy sheets were successfully fabricated using the accumulated extrusion bonding (AEB) process at different temperatures. It was found that processing temperature significantly affected microstructural evolution, with artificial cooling leading to grain refinement and improved mechanical properties. Annealing treatment was used to eliminate high dislocation density, with different temperatures affecting the mechanical properties.
JOURNAL OF MAGNESIUM AND ALLOYS
(2021)
Article
Materials Science, Multidisciplinary
Xia Cao, Tingzhuang Han, Ji Xu, Guangsheng Huang, Hua Zhang, Jianhui Bai, Fusheng Pan
Summary: This study systematically investigated the effects of initial orientation on microstructure evolution and mechanical properties of AZ31 Mg alloy sheets via accumulated extrusion bonding (AEB). The results showed that the microstructure gradually transformed into recrystallized grains with larger average grain size as the plunger continued to press down. The texture evolution also occurred during the extrusion process, leading to significant improvements in yield strength and fracture elongation of the samples.
PROGRESS IN NATURAL SCIENCE-MATERIALS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Joung Sik Suh, Byeong-Chan Suh, Jae Ok Choi, Young Min Kim, Bong Sun You
Summary: This study investigates the effect of extrusion temperature on room temperature tensile properties of as-extruded AZ91 plates regarding microstructure and texture development. The research reveals that, contrary to expectations, yield strength increases with extrusion temperature despite an increase in grain size. Stronger basal texture was found to play a dominant role in increasing yield strength.
METALS AND MATERIALS INTERNATIONAL
(2021)
Article
Metallurgy & Metallurgical Engineering
Tingzhuang Han, Guangsheng Huang, Heng Li, Lifei Wang, Hua Zhang, Fusheng Pan
Summary: This study investigates the accumulated extrusion bonding (AEB) of AZ31 Mg alloy with a heterogeneous bimodal grain structure. The combination of local water cooling and artificial cooling during the process results in the consecutive development of the microstructure through discontinuous dynamic recrystallization (DDRX). The two-stage cooling approach enables the retention of fine DRXed grains and high-residual dislocation density unDRXed grains, leading to a good strength-ductility balance.
JOURNAL OF MAGNESIUM AND ALLOYS
(2023)
Article
Metallurgy & Metallurgical Engineering
Min-jie Liang, Jie Zheng, Huan Liu, Bao-xing Yao
Summary: This study investigates the microstructure, texture evolution, and mechanical properties of AZ31 magnesium alloy during the cyclic expansion extrusion with the asymmetrical extrusion cavity (CEE-AEC) process. The results show that after 3 passes, the microstructures are refined and the textures are deflected, leading to significant improvements in the mechanical properties of the alloy.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2022)
Article
Materials Science, Multidisciplinary
Yuanxiao Dai, MengHan Xiao, Yaobo Hu, Yan Yang, Bin Jiang, Tianxu Zheng, Li Dong, Baoqing Yang, Changyong Zheng
Summary: By designing extrusion parameters, the Mg-0.12Ca-0.08Ba alloy underwent grain refinement and texture control, resulting in the best performance of the extruded samples with different crystallographic orientations.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Nanoscience & Nanotechnology
Jingkai Feng, Dingfei Zhang, Hongjun Hu, Yang Zhao, Xia Chen, Bin Jiang, Fusheng Pan
Summary: During semi-solid extrusion, AZ31 magnesium alloy exhibits a higher nucleation rate for new fine grains and limited twinning activation, resulting in a homogeneous microstructure and improved mechanical properties.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Heshuai Yu, Hongbao Cui, Zhengpeng Yang, Zhichao Xu
Summary: This study discusses the effect of extrusion temperatures on the microstructure, second phases particle, texture, and mechanical properties of the Mg-5Sn -1Si-0.6Ca alloy. The results show that decreasing the extrusion temperature benefits dynamic precipitation and grain refinement. The strength and plasticity of the alloy are simultaneously improved by the method of solid solution + lowtemperature extrusion.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Chemistry, Physical
Yu-Qing Li, Da-Ye Xu, Min Zha, Dong-Feng Chen, Yun-Tao Liu, Mei-Juan Li, Kai Sun, Gui-Jie Zhu, Si-Qing Wang, Tong Wang, Jian-Bo Gao, Xiao-Long Liu
Summary: The investigation focused on the bulk texture and mechanical properties of wide Mg-Al-Zn alloy sheets with different Al contents. Results showed that with increasing Al content, the intensity of the grain texture weakened, and the recrystallized grains had a more random orientation. This change is attributed to the refined microstructure, precipitates, and weakened basal texture.
Article
Nanoscience & Nanotechnology
Umer Masood Chaudry, Yeonju Noh, Gukin Han, Russlan Jaafreh, Tea-Sung Jun, Kotiba Hamad
Summary: This study investigates the effects of CaO additions on the microstructure, texture, and mechanical properties of AZ61 magnesium alloy. The addition of CaO leads to the formation of Ca-rich intermetallic compounds and influences the evolution of the alloy's structure. Additionally, the alloys containing CaO exhibit twined structures, with an increased fraction of tension twins as the amount of CaO increases.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Chemistry, Physical
Jiri Kubasek, Jan Pinc, Klara Hosova, Marketa Strakova, Orsolya Molnarova, Jan Duchon, David Necas, Miroslav Cavojskyc, Michal Knapek, Matjaz Godec, Irena Paulin, Dalibor Vojtech, Jaroslav Capek
Summary: This paper investigates the effects of extrusion temperature and ratio on the microstructure and mechanical properties of Zn-0.8Mg-0.2Sr alloy. The results show that the grain size, material texture, and dislocation substructures have a significant influence on the alloy's elongation range and anisotropy. Under appropriate extrusion conditions, the alloy's mechanical properties can be greatly improved.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Yuzhao Xu, Jingyuan Li, Mingfan Qi, Wenhui Guo, Yue Deng
Summary: This study investigated the influence of extrusion temperature on the microstructure, mechanical properties, and corrosion behavior of ZGMS alloy. The results showed that lower extrusion temperature led to refined grain size and improved mechanical properties. The alloy exhibited excellent mechanical properties and low corrosion rate after extrusion at 360 degrees Celsius.
MATERIALS CHARACTERIZATION
(2022)
Article
Materials Science, Multidisciplinary
Wei Li, Kaibo Nie, Zhilong Liu, Kunkun Deng, Yanan Li, Xili Tong
Summary: The addition of SiC nanowires affected the microstructure and mechanical properties of Mg-2Zn-0.1Y matrix composites under different hot extrusion parameters. Stengthening mechanism was analyzed and the results showed significant changes in grain size and volume fraction with variations in extrusion temperature and speed.
MATERIALS CHARACTERIZATION
(2022)
Article
Metallurgy & Metallurgical Engineering
Tianshuo Zhao, Yaobo Hu, Chao Zhang, Bing He, Tianxu Zheng, Aitao Tang, Fusheng Pan
Summary: Different extrusion conditions can affect the microstructure and mechanical properties of magnesium alloys. Increasing extrusion speed and annealing time can accelerate the growth of recrystallized grains and increase elongation. Large pre-forging deformation can refine the grains and increase the strength of the alloy. Decreasing extrusion ratio or increasing cooling rate will introduce coarse un-DRXed grains and transform the texture. Rapid cooling also has an obvious effect on refining recrystallized grains.
JOURNAL OF MAGNESIUM AND ALLOYS
(2022)
Article
Materials Science, Multidisciplinary
Jun Xu, Bin Jiang, Yuehua Kang, Jun Zhao, Weiwen Zhang, Kaihong Zheng, Fusheng Pan
Summary: Curve extrusion processes, including symmetric curve extrusion (SCE) and asymmetric curve extrusion (ACE) processes, were proposed to fabricate Mg-3Al-1Zn (AZ31) alloy sheets with the aim of improving planar anisotropy. The microstructures and mechanical properties of the fabricated sheets were analyzed and compared with traditional extrusion (TE) sheets. The results showed that both SCE and ACE sheets exhibited finer grain size, more uniform microstructure, and unique textures, indicating improved planar anisotropy.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Nanoscience & Nanotechnology
J. X. Huang, Y. Liu, T. Xu, X. F. Chen, Q. Q. Lai, L. R. Xiao, Z. Y. Pan, B. Gao, H. Zhou, Y. T. Zhu
Summary: The martensitic transformation greatly enhances the strength of low-carbon steels, but usually at the expense of ductility. By creating a dual-phase heterostructure through annealing and cold rolling, a high strength and ductility combination steel was achieved. The hetero-deformation induced stress in the sample contributed to the improved mechanical properties of the steel.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Nanoscience & Nanotechnology
Yanfei Wang, Yueguang Wei, Zhifu Zhao, Zhongya Lin, Fengjiao Guo, Qian Cheng, Chongxiang Huang, Yuntian Zhu
Summary: This study quantitatively investigates the mechanical response of a nanostructured Cu-10Zn layer constrained by coarse-grained Cu layers, revealing unique mechanical behaviors attributed to inter-layer constraint. The nanostructured layer displays large uniform elongation, moderate work hardening, and gradually reduced engineering stress, mainly due to the dispersed stable strain bands formed by the inter-layer constraint, enabling extensive activation of mechanical twinning and stacking faults. These findings provide new insights into the deformation and load-bearing mechanisms of heterostructures.
SCRIPTA MATERIALIA
(2022)
Review
Materials Science, Multidisciplinary
Wei Jiang, Yuntian Zhu, Yonghao Zhao
Summary: Recently, heterostructured materials consisting of hard and soft zones have gained attention for their superior mechanical properties and retention of ductility. High-entropy alloys and medium-entropy alloys, which typically contain three or more principal elements, have also been extensively studied.
FRONTIERS IN MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Shuaishuai Liu, Han Liu, Xiang Chen, Guangsheng Huang, Qin Zou, Aitao Tang, Bin Jiang, Yuntian Zhu, Fusheng Pan
Summary: Heterostructure metals exhibit an excellent combination of strength and ductility by grain refinement, texture strengthening, and coordination of plastic deformation through non-basal slips and cross slips.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Nanoscience & Nanotechnology
Guosheng Sun, Jizi Liu, Yuntian Zhu
Summary: By introducing a bi-modal heterostructure, Luders deformation in UFG 304 stainless steel can be effectively suppressed, leading to improved ductility and toughness without sacrificing strength.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Yi Li, Peijian Shi, Mingyang Wang, Yinpan Yang, Yan Wang, Yiqi Li, Yuebo Wen, Weili Ren, Na Min, Yan Chen, Yifeng Guo, Zhe Shen, Tianxiang Zheng, Ningning Liang, Wenjun Lu, Peter K. Liaw, Yunbo Zhong, Yuntian Zhu
Summary: This study comparatively investigates the deformation mechanisms of an Al19Co20Fe20Ni41 EHEA at different temperatures, revealing the high frequency and density of dislocation multi-slip scenario in the soft eutectic lamellae and the corresponding compatible co-deformation in the adjacent hard lamellae. These mechanisms contribute to the strong hetero-deformation-induced (HDI) hardening and excellent cryogenic properties of the material.
MATERIALS RESEARCH LETTERS
(2022)
Review
Materials Science, Multidisciplinary
L. Romero-Resendiz, M. El-Tahawy, T. Zhang, M. C. Rossi, D. M. Marulanda-Cardona, T. Yang, V. Amigo-Borras, Y. Huang, H. Mirzadeh, I. J. Beyerlein, J. C. Huang, T. G. Langdon, Y. T. Zhu
Summary: This paper reviews the microstructural aspects, properties, and processing-microstructure-properties relationship of heterostructured stainless steel (HS SS), and discusses the multi-disciplinary perspectives.
MATERIALS SCIENCE & ENGINEERING R-REPORTS
(2022)
Article
Materials Science, Multidisciplinary
Yi Liu, Bo Gao, Ming Yang, Lirong Xiao, Jiaxin Wang, Jiaxin Ma, Xiangjie Chen, Hao Zhou, Yuntian Zhu
Summary: The improvement of strength in low-carbon steel usually leads to a reduction in ductility due to the low strain-hardening rate of ultrafine-grained materials. The heterostructured strategy, achieved through phase transformation, offers a new way to enhance the strain-hardening rate. In this study, intercritical annealing was used to produce a dual-phase heterostructure in low-carbon steel, leading to improved strength and ductility. The presence of ferrite and martensite in the heterostructured steel resulted in a higher density of low-angle grain boundaries and geometrically necessary dislocations, promoting strain partitioning and ultimately improving the combination of strength and ductility.
Article
Materials Science, Multidisciplinary
X. X. Dong, Y. F. Shen, Y. T. Zhu
Summary: A principle is proposed and verified that an optimized moderate strain hardening rate is desired for producing the best mechanical properties for metallic materials. It is demonstrated that moderate strain hardening rate is desired for better ductility and high yield strength in a medium carbon TRIP steel. By adjusting the temperature for bainitic transformation, the TRIP kinetics were tailored to produce moderated but long-lasting strain hardening for high ductility and high yield strength.
MATERIALS RESEARCH LETTERS
(2023)
Article
Chemistry, Physical
Jiahao Li, Kejie Lu, Yi Wang, Yuqi Zhang, Xinkai Ma, Jieming Chen, Yuntian Zhu
Summary: This work investigates the fabrication of nanotwinned Al0.1CoCrFeNi high-entropy alloy (HEA) using cryogenic multi-directional compression (CMC) followed by stress-relief annealing, and demonstrates the enhanced cryogenic tensile properties of the nanotwinned HEA. The introduction of high-density dislocations and hierarchical nanotwins in the HEA samples contributes to the excellent mechanical performance.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Yanfei Wang, Xiaolong Ma, Fengjiao Guo, Zhifu Zhao, Chongxiang Huang, Yuntian Zhu, Yueguang Wei
Summary: In this article, the strategic design of dispersed heterostructure is advocated to maintain ductility and toughness in high-strength metals, using the example of the equiatomic CrCoNi alloy. The dispersed heterostructure, composed of nanograins and/or ultrafine grains (the hard zone) dispersed around micrometer-sized grains (the soft zone), is fabricated through cold-rolling and sequential flash annealing at increasing temperatures. The dispersed heterostructure exhibits a decent uniform elongation of about 20% and an exceptional strain energy density limit of up to 240 mJ/mm(3) at a strength level of about 1.2 GPa, surpassing its homogeneous and clustered heterogeneous counterparts. Grain size-dependent heterogeneous deformation induces inter-zone interactions, leading to strain partitioning, additional mechanical twinning, and the development of dislocation gradient and long-range internal stress near the zone boundaries, resulting in a multistage work hardening with extraordinary strain hardening rate up-turn followed by slow attenuation. The dispersed heterostructure provides a higher density of zone boundaries, ensuring more extensive inter-zone interaction and maximizing the extraordinary strain hardening to improve ductility.
MATERIALS & DESIGN
(2023)
Article
Nanoscience & Nanotechnology
Zhengrong Fu, Bo Gao, Xingfu Li, Cong Li, Hongjiang Pan, Haidong Niu, Yuntian Zhu, Hao Zhou, Xinkun Zhu, Haijun Wu, Chun Liu
Summary: In this study, pure Zr was processed using rotary swaging at room temperature to form a heterostructure consisting of nano/ultrafine grains and recrystallized coarse grains. The as-swaged Zr showed significantly increased strength and the formation of a <10 1 0> fiber texture parallel to the SD. In addition, a basal-type HCP-FCC phase transformation was detected during rotary swaging and maintained after annealing. The as-annealed Zr with the heterostructure exhibited a superior combination of high strength and enhanced ductility, attributed to the multi-scale heterostructured effects.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Review
Materials Science, Multidisciplinary
Yuntian Zhu, Xiaolei Wu
Summary: Heterostructured materials are a new class of materials composed of heterogeneous zones with dramatically different properties. They exhibit superior mechanical or physical properties that surpass their conventional homogenous counterparts. This review focuses on the structural heterostructured materials, which achieve their superior mechanical properties through hetero-deformation induced strengthening and work hardening. The unique deformation behavior of these materials, along with their wide application potential, is driving the rapid development of the field.
PROGRESS IN MATERIALS SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Wenyu Chen, Rui Zhou, Wanpeng Li, Yen-Hsiang Chen, Tzu-Hsiu Chou, Xu Wang, Yong Liu, Yuntian Zhu, J. C. Huang
Summary: The corrosion behaviors of selective laser melted FeCoCrNi multi-principal element alloys with carbon or nitrogen addition in 0.5 M H2SO4 solution were investigated. Carbon and nitrogen additions refined the grains and introduced a heterogeneous structure, but had opposite effects on corrosion behavior. Doped carbon participated as nano-sized carbides and caused localized galvanic corrosion, while doped nitrogen formed CrN chemical clusters and resulted in a protective passive film with higher Cr2O3/Cr(OH)3 ratio.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Nanoscience & Nanotechnology
Yanfang Liu, Jie Ren, Jian Liu, Yang Cao, Wei Liu, Tianyi Li, Yuntian Zhu, Wen Chen
Summary: The AM CoCrFeMnNi alloy, produced by laser powder-bed fusion, exhibits prominent cellular dislocation structures and exceptional thermal stability with high hardness at elevated temperatures. The low crystallographic misorientations across the dislocation cell walls, sluggish atomic diffusion, and pinning effects of oxide nanoprecipitates are the key factors contributing to this outstanding thermal stability.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(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)
