Article
Nanoscience & Nanotechnology
Kaixuan Li, Yuanlin Zhuang, Ligong Zhao, Dongshan Zhao, He Zheng, Shuangfeng Jia, Ying Zhang, Peili Zhao, Jianian Gui, Jianbo Wang
Summary: The study investigated the interaction between deformation twinning and long period stacking ordered (LPSO) structures in an Mg-based alloy, showing the hindrance of LPSO structures and stacking faults to twinning. The in-situ experiments revealed that thick LPSO plates effectively retard the twinning propagation, and the closer spacing between LPSO structures further suppresses twin propagation. Additionally, the study discussed the resistance of stacking faults to twinning at the atomic scale, and the strengthening effect of LPSO structures on suppressing twinning growth.
SCRIPTA MATERIALIA
(2022)
Article
Materials Science, Multidisciplinary
Jinshu Xie, Jinghuai Zhang, Zhi Zhang, Qiang Yang, Kai Guan, Yuying He, Ru Wang, Hao Zhang, Xin Qiu, Ruizhi Wu
Summary: Formation of solute-enriched stacking faults (SESFs) and their transformation into long period stacking ordered (LPSO) phase in Mg alloys have been achieved in this study. The role and advantages of SESFs and LPSO phase were confirmed by experimental observations. These findings are significant for the development of high-strength and anti-corrosion Mg alloys.
Article
Nanoscience & Nanotechnology
Xiaojie Zhou, Xiaodong Yang, Xianzheng Lu, Jian Zhang, Shilun Yu, Xiaomin Chen, Liwei Lu
Summary: This study investigates the effect of LPSO grain orientation on the compression behavior and workability of Mg alloys. It is found that the LPSO grain orientation affects the deformation behavior and workability of the alloy. The presence of sufficient initial grain boundaries weakens the effect of LPSO grain orientation on the dynamic recrystallization ratio and workability.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Review
Metallurgy & Metallurgical Engineering
Yujin Nie, Jianwei Dai, Xuan Li, Xiaobo Zhang
Summary: Corrosion is a major drawback for the wide applications of Mg alloys, with attention being drawn to the corrosion behaviors of alloys with stacking fault or long period stacking ordered structures. However, the corrosion mechanisms of these alloys remain unclear, calling for further research and improvement.
JOURNAL OF MAGNESIUM AND ALLOYS
(2021)
Article
Chemistry, Physical
M. Legree, V Charbonnier, S. Al Bacha, K. Asano, K. Sakaki, I Aubert, F. Mauvy, J-L Bobet
Summary: In this study, the hydrogen generation performance of LPSO compounds and LPSO + Mg alloys in simulated seawater solution was investigated. Results showed that LPSO compounds, especially the single phase LPSO Mg(87.6N)i(5.5)Y(6.9), exhibited improved H2 generation features compared to pure Mg. Alloys containing both Mg and LPSO benefited from galvanic coupling between the two phases, leading to higher reactivity and lower activation energies.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Materials Science, Multidisciplinary
Amir Hossein Asadi, Parastoo Mahmoud Kalayeh, Hamed Mirzadeh, Mehdi Malekan, Massoud Emamy
Summary: In this study, the microstructures, mechanical properties during tensile deformation, and precipitation kinetics of Mg95.5Y3Zn1.5 and Mg95.5Y3Ni1.5 magnesium alloys were compared. The investigation revealed that the peak aging treatment led to the formation of lamellar 14H-LPSO phase in Mg95.5Y3Zn1.5 alloy and bMODIFIER LETTER PRIME-Mg7Y particles in Mg95.5Y3Ni1.5 alloy, resulting in improved ultimate tensile strength and total elongation. The analysis of formation kinetics indicated that the activation energy for phase transformation was different for the two alloys.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Nanoscience & Nanotechnology
Quan Li, Jian Song, Yiwen Chen, Qi Zhang, Qingchun Zhu, Yue Liu, Jian Wang, Xiaoqin Zeng
Summary: Long-period stacking ordered (LPSO) phases effectively enhance the strength of Mg alloys by inhibiting the motion of non-basal dislocations and deformation twins. It was previously believed that LPSO phases do not affect the motion of basal dislocations. However, through in-situ TEM nanoindentation testing in a Mg97Y2Zn alloy, it was observed that the activity of basal dislocations is significantly reduced between LPSO phases with spacing less than 20 nm. Atomic HADDF-STEM results also revealed a high concentration of solute atoms near LPSO phases, which could contribute to strong solute strengthening. These findings have potential implications for the design of ultra-high strength Mg alloys containing nano-spaced LPSO phases.
SCRIPTA MATERIALIA
(2023)
Article
Materials Science, Multidisciplinary
Qianqian Jin, Xiaohong Shao, Shijian Zheng, Yangtao Zhou, Bo Zhang, Xiuliang Ma
Summary: Understanding the interface structure between strengthening precipitates and matrix in alloys at the atomic level is crucial for tailoring the mechanical properties. High-resolution scanning transmission electron microscopy was used to study the semi-coherent interfaces in Mg-Zn-Y alloys, revealing unique features such as Shockley partial dislocations and dissociated structures. The interaction between dislocation arrays and solute atoms plays a key role in the stability and morphology of these interfaces, influencing the lateral growth of LPSO phases in Mg alloys.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
L. D. Xu, S. J. Ding, X. C. Cai, Y. Wu, Z. J. Li, K. K. Wen, S. W. Xin, B. R. Sun, M. X. Huang, T. D. Shen
Summary: This study reveals the oxidation behavior of Mg-Y-Zn LPSO phase at different temperatures through analysis and calculations. The results show that Y2O3 is mainly formed at a low temperature, while MgO is preferentially formed at a high temperature. This study is of great importance for the development of oxidation-resistant LPSO-containing Mg alloys.
Article
Materials Science, Multidisciplinary
M. Lv, Q. Q. Jin, X. H. Shao, Y. T. Zhou, B. Zhang, X. L. Ma
Summary: In this study, the aging behavior of a Mg-10Gd-3Y-1.0Zn0.5Zr (wt.%) alloy with a long-period stacking ordered (LPSO) phase at 275 degrees C was investigated. The evolution of prismatic precipitates was examined using transmission electron microscopy (TEM). The results showed that the number and type of prismatic precipitates play a significant role in determining the hardness of the alloy.
PHILOSOPHICAL MAGAZINE
(2023)
Article
Materials Science, Multidisciplinary
Jinshu Xie, Jinghuai Zhang, Zhi Zhang, Zijian Yu, Zhihao Xu, Ru Wang, Daqing Fang, Xiaobo Zhang, Xiaoru Zhang, Ruizhi Wu
Summary: Understanding the corrosion mechanism of magnesium (Mg) alloys and controlling the potential fluctuation are crucial for developing high-strength corrosion-resistant Mg alloys. This study reveals that the presence of different microstructures in Mg alloys can affect the corrosion rate and film formation. The structurally enhanced microstructure can reduce the potential fluctuation, leading to improved corrosion resistance.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Nanoscience & Nanotechnology
Xiaojie Zhou, Wenying Xiong, Gang Zeng, Hongchao Xiao, Jian Zhang, Xianzheng Lu, Xiaomin Chen
Summary: The combined effects of LPSO orientation and alpha-Mg texture on tensile anisotropy were investigated, with the extrusion direction showing optimal mechanical properties, the 45 degrees direction exhibiting high elongation, and the transverse direction having inferior strength and elongation simultaneously. LPSO orientation contributes to strength anisotropy through different load-bearing strengthening effects along different tensile axes, while alpha-Mg texture contributes to strength anisotropy through stronger grain boundary strengthening effects. However, LPSO orientation, rather than alpha-Mg texture, accounts for ductility anisotropy.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Chemistry, Physical
Q. Q. Jin, X. H. Shao, M. Lv, B. Zhang, C. Liu, Y. M. Li, X. L. Ma
Summary: This study examined the stacking disordered structures in Mg-Co-Y as-cast alloys, which mainly consist of F-blocks, T-blocks, 2-Mg, 3-Mg, and 4-Mg. These components can form complex structures with similar stacking characters, and their stacking sequence, periodicity, and symmetry have been characterized. The structural similarity and difference between SD structures and LPSO structures were analyzed by comparing their stacking sequences and cluster arrangements.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Review
Metallurgy & Metallurgical Engineering
Janet M. Meier, Josh Caris, Alan A. Luo
Summary: Mg-rare earth (RE) based systems offer important commercial alloys and opportunities for high strength applications. The phase diagrams, microstructure, and strengthening mechanisms of these systems are complex. This review provides critical insights into phase equilibria and strengthening mechanisms, highlights the combination of precipitation and long period stacking order (LPSO) phases for superior strength and ductility in Mg-RE based cast alloys, and suggests future research directions for alloy design and industrial scale applications.
JOURNAL OF MAGNESIUM AND ALLOYS
(2022)
Review
Metallurgy & Metallurgical Engineering
Janet M. Meier, Josh Caris, Alan A. Luo
Summary: Mg-rare earth (RE) based systems offer commercial alloys and alloy development opportunities for high strength applications. Phase diagrams and strengthening mechanisms in these complex systems, including precipitation and LPSO phases, are critical for understanding and enhancing alloy properties. Further research is necessary to explore the combination of these phases for alloy design and industrial applications.
JOURNAL OF MAGNESIUM AND ALLOYS
(2022)
Article
Materials Science, Multidisciplinary
Ke Liu, Jing-Tao Liang, Wen-Bo Du, Shu-Bo Li, Zhao-Hui Wang, Zi-Jian Yu, Jin-Xue Liu
Summary: The addition of trace amounts of Zn and/or Er was found to play a key role in modifying the texture, activating shear bands formation, and precipitating nanoscale secondary phases in magnesium alloy sheets, leading to a significant improvement in both stretch formability and mechanical properties.
Article
Chemistry, Physical
Zijian Yu, Linlin Liu, Adil Mansoor, Ke Liu, Shubo Li, Wenbo Du
Summary: In this study, a high-performance Mg-8Gd-2Y-1Zn-6Li alloy was successfully fabricated, showing significant improvements in yield strength and ultimate tensile strength. The investigation of intermetallic compounds revealed the unique microstructure features and the discovery of a novel island-like beta(1R) phase in Mg-Gd-Li based alloys. These structural components contribute to the high performance of the alloy.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Metallurgy & Metallurgical Engineering
Zijian Yu, Xi Xu, Baotian Du, Kang Shi, Ke Liu, Shubo Li, Xiuzhu Han, Tao Xiao, Wenbo Du
Summary: The mechanical performance of the studied alloys was significantly influenced by the precipitation of the gamma' phase, which was regulated by the addition of Ca and the cooling method during the T4 treatment.
ACTA METALLURGICA SINICA-ENGLISH LETTERS
(2022)
Article
Chemistry, Physical
Ke Liu, Feng Lou, Zijian Yu, Zhaohui Wang, Shubo Li, Xian Du, Wenbo Du
Summary: The rolling temperature has a significant influence on the microstructures, age-hardening responses, and mechanical properties of GE61K sheets. Different microstructures were observed at 300°C, 350°C, 400°C, and 450°C. The formation of chain-like precipitates at 300°C contributes to a good strength-ductility balance, but this balance is disrupted at 400°C due to microstructure changes.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Adil Mansoor, Wenbo Du, Zijian Yu, Ning Ding, Junjian Fu, Linyue Jia, Ke Liu, Shubo Li
Summary: The microstructure and mechanical properties of the Mg-12Gd-2Er-0.4Zr alloy were significantly improved by primary and secondary extrusion processing. Secondary extrusion led to refined grains and dispersed secondary phases, resulting in the best balance of strength and elongation. The excellent elongation was mainly attributed to fully refined dynamic recrystallized grains after secondary extrusion, while the alloy strengthening was mainly due to refined grains and strong precipitation strengthening.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2021)
Article
Materials Science, Multidisciplinary
Zijian Yu, Xi Xu, Adil Mansoor, Baotian Du, Kang Shi, Ke Liu, Shubo Li, Wenbo Du
Summary: A high-performance Mg alloy was successfully prepared by low-temperature hot extrusion, showing improved mechanical properties due to the presence of three phase variants, solid solution elements, and a bimodal structure. The alloy contains a novel island-shaped beta(1R) phase formed by strain-induced, dislocation-assisted dynamic precipitation. The mechanical properties are significantly enhanced by the densely distributed beta(1R) precipitates via Orowan strengthening at both room temperature and elevated temperatures.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Article
Chemistry, Physical
Adil Mansoor, Wenbo Du, Zijian Yu, Ning Ding, Junjian Fu, Feng Lou, Ke Liu, Shubo Li
Summary: The effects of grain refinement and precipitate evolution on the mechanical performance of Mg-12Gd-2Er-0.4Zr alloy fabricated by double extrusion are analyzed. The results show that double extrusion leads to the fragmentation of bulky precipitates and the formation of fine precipitates, resulting in a refined grain structure and increased content of rare-earth elements. The presence of fine precipitates and refined grains contributes to a high yield strength and elongation in the alloy.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Metallurgy & Metallurgical Engineering
Ke Liu, Feng Lou, Jun-jian Fu, Zi-jian Yu, Shu-bo Li, Zhao-hui Wang, Xian Du, Wen-bo Du
Summary: The corrosion behaviors and mechanism of Mg-xZn-0.5Er (x = 0.5, 2.0, 3.0 and 4.0, in wt.%) alloys were investigated. The potential difference between the second phase and matrix was determined by the type and size of the second phases. The dominated nano-scale W-phase on the matrix induced sharp local pitting corrosion, while an increase in the volume fraction of the coarse W-phase or I-phase resulted in preferential corrosion around them, leading to obvious uniform corrosion and an accelerated corrosion rate.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2022)
Article
Nanoscience & Nanotechnology
Zijian Yu, Yuanding Huang, Linlin Liu, Kang Shi, Baotian Du, Ke Liu, Shubo Li, Wenbo Du
Summary: A new strategy of using Li addition to solve the strength-ductility trade-off in Mg-Gd alloys is reported. Li addition promotes the precipitation of different phases and enhances the activity of dislocations, resulting in simultaneous improvement in yield strength and ductility. Moreover, Li addition reduces the density, increasing the specific yield strength.
SCRIPTA MATERIALIA
(2022)
Article
Chemistry, Physical
Kang Shi, Shubo Li, Zijian Yu, Baotian Du, Ke Liu, Wenbo Du
Summary: The addition of Gd and Nd elements can refine the grains, weaken the texture, and promote the precipitation of fine particles, thereby improving the mechanical properties of the alloy. Pre-annealing treatment before hot extrusion can generate Mg5RE particles, which further refine the recrystallized grains by pinning the grain boundaries, while simultaneously improving the ductility and strength of the alloy.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Chenchen Zhao, Yuhong Jin, Zijian Yu, Shubo Li, Fanjing Meng, Yanping Yuan, Yuanfen Cheng, Wenbo Du
Summary: This work presents a novel nanohybrid catalyst composed of amorphous B doped Fe-Ni bimetal hydroxide nano-sheets supported on multiwalled carbon nano-tubes for high-efficiency Zn-air batteries. The nanohybrid catalyst exhibited outstanding activity and stability for the oxygen evolution reaction, with an overpotential of 219.43 mV for 10 mA cm-2 and a Tafel slope of 43.1 mV dec-1. The fabricated Zn-air battery showed excellent energy efficiency and high cycling stability, indicating the potential of the nanohybrid catalyst for low-cost, efficient, and stable Zn-air batteries.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Metallurgy & Metallurgical Engineering
Baotian Du, Zijian Yu, Kang Shi, Ke Liu, Shubo Li, Wenbo Du
Summary: This study investigated the effects of different ageing treatments on the mechanical properties of Mg-8Gd-3Y-0.5Ag-0.5Zr alloy. The combination of 2% pre-strain and two-stage ageing treatment (P2%TSA) showed the highest strengthening effect and generated multiple composite precipitates. Unlike the traditional β' phase strengthening mechanism, the composite precipitates exhibited better combined strengthening effect in the alloy.
ACTA METALLURGICA SINICA-ENGLISH LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Xiuzhu Han, Tao Xiao, Zijian Yu
Summary: The microstructure, texture evolution, and strain hardening behavior of Mg-1Y and Mg-1Zn alloys were investigated under room temperature compression. The experimental results showed that Mg-1Zn alloy exhibited a conventional three-stage strain hardening curve, while Mg-1Y alloy exhibited a novel six-stage strain hardening curve. The different strain hardening behaviors were attributed to the different textures and the interactions between slip and twinning activities in the alloys. The findings provide insights into the relationship between microstructure, texture, and strain hardening behavior in Mg alloys.
JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
(2023)
Article
Materials Science, Multidisciplinary
Jinshu Xie, Jinghuai Zhang, Zhi Zhang, Zijian Yu, Zhihao Xu, Ru Wang, Daqing Fang, Xiaobo Zhang, Xiaoru Zhang, Ruizhi Wu
Summary: Understanding the corrosion mechanism of magnesium (Mg) alloys and controlling the potential fluctuation are crucial for developing high-strength corrosion-resistant Mg alloys. This study reveals that the presence of different microstructures in Mg alloys can affect the corrosion rate and film formation. The structurally enhanced microstructure can reduce the potential fluctuation, leading to improved corrosion resistance.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Nanoscience & Nanotechnology
Zijian Yu, Yuanding Huang, Bin Peng, Ke Liu, Shubo Li, Wenbo Du
Summary: In-situ and ex-situ observations using high-angle annular dark-field scanning transmission electron microscopy reveal the formation mechanism of beta(1) phase in age-hardenable magnesium-rare earth alloys. The beta(1) phase is transformed from beta(F)' phase through short-range solute diffusion, atomic shuffle, and shear mechanism. This study provides direct evidence and resolves the long-standing controversy.
SCRIPTA MATERIALIA
(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)
