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
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
Lei Zhang, Shuaijie Zhang, Kangxin Ouyang, Yihuan Zhou, H. Huang, Pian Xu
Summary: The microstructure and mechanical properties of as-cast Mg-Er-Cu, Mg-Er-Ni, and Mg-Er-Zn alloys prepared by conventional ingot metallurgy have been studied. The 18R long period stacking ordered (LPSO) phases in all three alloys solidify directly from the melt. Differences exist in the tensile strength and ductility among the three alloys.
ADVANCED ENGINEERING MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Yiwen Chen, Mingdi Yu, Jingya Wang, Quan Li, Weisen Zheng, Jianbo Li, Xiaoqin Zeng
Summary: This study systematically investigates the atomic structures of the equilibrated 18R and 10H phases in Mg-Y-Al alloys and constructs a new thermodynamic model for the LPSO phase. It provides valuable insights into the formation mechanism of LPSO phases and guides the design of Mg-Y-Al alloys.
MATERIALS & DESIGN
(2023)
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
Materials Science, Multidisciplinary
Jing Tian, Ge Yang, Zehua Lei, Jiehua Huang, Zhiwen Zhang, Jianhui Xie
Summary: The microstructure, biocorrosion resistance, and osteogenesis performances of as-cast Mg-Zn-Y-Mn alloys with different volume fraction of long period stacking ordered (LPSO) structure were investigated. 18R-LPSO phase can be formed in the alloys, and its volume fraction increases with the elevating Zn and Y content. The corrosion mechanism of the three alloys is dominated by the micro-galvanic effect between cathodic LPSO and anodic α-Mg, resulting in the accelerating corrosion rate with the increasing volume fraction of LPSO phase.
Article
Materials Science, Multidisciplinary
Jiaxin Zhang, Xin Ding, Ruirun Chen, Wenchao Cao, Yong Zhang, Jingjie Guo
Summary: To enhance the hydrogen storage performance of Mg-rich alloys, element Sc is introduced into Mg-Y-Zn alloy, which effectively enhances the dehydrogenation kinetics and facilitates the decomposition of YH3. Sc-doping weakens H2 sorption but ensures H atom diffusion in the Mg matrix. Sc substitution makes it difficult for hydrogen to diffuse deeper into the samples, resulting in a large ratio of unhydrided Mg.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Tsubasa Tokuzumi, Masatoshi Mitsuhara, Shigeto Yamasaki, Tomonari Inamura, Toshiyuki Fujii, Hideharu Nakashima
Summary: The excellent mechanical properties of Mg-Zn-Y alloys with a Mg-based long-period stacking ordered (LPSO) phase are attributed to the kink bands formed by plastic deformation. This study investigated the strengthening mechanism of kink bands in directionally solidified single-phase LPSO Mg85Zn6Y9 alloys. It was found that the presence of disclinations and dislocation pile-ups contribute to the kink-band strengthening. The study provides insights into the factors responsible for kink-band strengthening in LPSO-phase Mg alloys.
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
Metallurgy & Metallurgical Engineering
Xiangyu Wang, Chao He, Xue Li, Lang Li, Yongjie Liu, Qingyuan Wang
Summary: This study investigates the crack behaviors of magnesium alloys with a long-period stacking ordered structure under very high cycle fatigue conditions. It finds that the LPSO structure can inhibit the early crack propagation, leading to a higher fatigue crack propagation threshold.
JOURNAL OF MAGNESIUM AND ALLOYS
(2023)
Article
Chemistry, Physical
Yichao Xie, Guanjiu Wu, Yuan Li, Yongxi Zhang, Qing Wang, Lu Zhang, Shumin Han
Summary: This study used a low-cost YFe0.85 master alloy to improve the cycling stability of La-Mg-Ni-based hydrogen storage alloys. The prepared alloys showed good cycling stability, higher capacity, and satisfactory kinetics.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Nanoscience & Nanotechnology
Cheng Liu, Xiaohua Yang, Jianchao Peng, Bin Liu, Qun Luo, Qian Li, Kuo-Chih Chou
Summary: The deformation behaviors of a dual-phase Mg alloy containing α-Mg and 18R-LPSO phases were investigated in this study. The 18R phase, accounting for 11.3 vol.%, contributed to 23.0% of the overall alloy deformation. The coordinated twinning deformation of α-Mg matrix through the slip of basal dislocations and the kinking deformation of Mg slices induced by the 18R phase were observed during the early stage of deformation. At the end of deformation, a large number of T2-type stacking faults were generated, improving the ductility of the alloy. This work provides a novel strategy for designing high-strength and good ductility dual-phase Mg alloys.
SCRIPTA MATERIALIA
(2023)
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
Chemistry, Physical
Xin F. Tan, Manjin Kim, Qinfen Gu, Julio Pinzon Piraquive, Guang Zeng, Stuart D. McDonald, Kazuhiro Nogita
Summary: This study investigates the effects of Na in hypo-eutectic Mg-lwt.%Si alloys for H-2 storage applications. The addition of trace amounts of Na is vital in improving the H-2 sorption kinetics, achieving a high storage capacity. The study also analyzes the hydrogen sorption mechanisms and identifies the role of Na in facilitating hydrogen diffusion.
JOURNAL OF POWER SOURCES
(2022)
Article
Chemistry, Physical
Wei Zhang, Dongliang Zhao, Jun Li, Zeming Yuan, Shihai Guo, Yan Qi, Yanghuan Zhang
Summary: Ball milling Mg-based alloys with transition metal compounds enhances their hydrogen storage performances. In this experiment, La1.7Y0.3Mg16Ni + x wt.% TiF3 (x = 0-10) alloys were prepared using mechanical milling technology. XRD, SEM, HRTEM, and granulometry were used to analyze the composition and microstructure. The addition of TiF3 improves the crystallinity, reduces particle and crystallite sizes, and enhances hydriding and dehydriding kinetics. Adding 7 wt% TiF3 decreases the dehydrogenation activation energy and improves the hydrogen absorption rate at low temperatures.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Engineering, Aerospace
Yunfei Wang, Minjie Wang, Biao Chen, Huijie Sun, Katsuyoshi Kondoh, Laszlo J. Kecskes, Jianghua Shen
Summary: Aluminum alloy 5083 (AA5083) processed by large-scale Equal-channel angular pressing (ECAP) is an excellent engineering material with great prospects for industrial applications. An accurate assessment of the underlying constitutive relationships with easily determined material constants is critical for the predictive design and informed processing of such structural materials. A new dynamic constitutive model based on thermal activation theory was established to describe the plastic flow behavior of the ECAP-processed AA5083 alloy and showed excellent agreement with experimental results.
CHINESE JOURNAL OF AERONAUTICS
(2023)
Article
Materials Science, Multidisciplinary
Wenjie Song, Jie Liu, Shuai He, Jianghua Shen, Guang Yang, Yanhui Liu, Youxing Chen, Qiuming Wei
Summary: This study prepared ultra-light and high-strength Mg-Li alloys via vacuum induction melting and investigated the effects of the rare earth element yttrium (Y) on their microstructure and mechanical properties. The alloys showed a microstructure consisting of different phases, including alpha-Mg, beta-Li, AlLi, and MgLi2Al. The addition of Y resulted in the formation of sharp-edged Al2Y phases. The presence of nano-scale lath-shape MgLiZn phases and the continuous growth of MgLi2Al phases at the grain boundaries were observed. The 0.5Y alloy exhibited the highest tensile strength and a significantly higher yield strength compared to the 0Y alloy. Solid solution strengthening, precipitate strengthening, and grain refinement were identified as the primary strengthening mechanisms caused by the addition of Y into the Mg-10Li-3Al-3Zn alloy.
MATERIALS CHARACTERIZATION
(2022)
Article
Metallurgy & Metallurgical Engineering
Yongji Liu, Zhonghao Heng, Yupeng He, Ziming Dong, Hailong Jiang, Zhigang Zeng, Jianghua Shen
Summary: Equal channel angular extrusion (ECAE) is an effective method for grain refinement. In this study, the microstructure evolution and tensile behavior of a Mg alloy, AZ31, after each ECAE pass were investigated. A previously unreported rule was discovered, showing that the alloy follows a specific texture evolution pattern regardless of the prior microstructure. The tensile behavior of the extruded samples was found to be highly related to the microstructure.
TRANSACTIONS OF THE INDIAN INSTITUTE OF METALS
(2023)
Article
Chemistry, Physical
Jie Wan, Jinglun Yang, Xinyi Zhou, Biao Chen, Jianghua Shen, Katsuyoshi Kondoh, Jinshan Li
Summary: To solve the issue of ductility collapse in high-strength aluminum matrix composites reinforced with graphene nanosheets (GNSs), a large amount of in-situ alumina nanoparticles (-3 vol%) were introduced into the GNSs/Al composite. Microstructural characterization showed that the introduced alumina nanoparticles were alpha-Al2O3 with a diameter of about 30 nm, uniformly distributed on the Al matrix. Tensile tests revealed that the composite exhibited high tensile strength (464 MPa) and appreciable ductility (8.9%), surpassing results reported in literature. Fractographic analysis indicated that the in-situ alumina nanoparticles acted as nucleation sites for dimples, enabling strain-delocalization and enhancing the plastic deformability. Analysis on strengthening mechanisms confirmed the synergistic reinforcing effect of ex-situ GNSs and in-situ alumina nanoparticles. These findings provide guidance for improving the mechanical properties of GNSs/Al composites.
Article
Materials Science, Multidisciplinary
H. Geng, B. Chen, J. Wan, J. Shen, K. Kondoh, J. S. Li
Summary: Many studies have shown that carbon nanotubes (CNTs) can significantly strengthen pure aluminum and this study investigates whether the same strengthening effect can be achieved in a high-strength aluminum alloy. The results showed that while both composites had the same tensile strength, CNTs had a stronger reinforcing effect in pure aluminum than in the aluminum alloy, suggesting the influence of the matrix on the strengthening behavior of CNTs in aluminum matrix composites.
MATERIALS CHARACTERIZATION
(2023)
Article
Nanoscience & Nanotechnology
Wendi Shi, Jianghua Shen, Siyu Lu, Biao Chen, Muhammad Atif, Yulong Li
Summary: A novel Ti-doped ultra-high oxygen content material with outstanding ductility was prepared. Micropillar compression test showed remarkable tensile elongation and high work hardening rate attributed to the presence of multiple slipping systems.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Nanoscience & Nanotechnology
Jie Wan, Huarui Geng, Biao Chen, Jianghua Shen, Katsuyoshi Kondoh, Jinshan Li
Summary: To overcome the decrease in ductility when strengthening metals through compositing, this study proposes intragranular nano-reinforcement in AMCs via reactive SLM. By completely reacting SiC nanoparticles with Al, in-situ intragranular nanophases were formed, resulting in a high strengthening efficiency (up to 110%) without sacrificing ductility. This study suggests a new direction for developing high-performance AMCs.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Nanoscience & Nanotechnology
Xiuxia Wang, Xianzhe Shi, Yuzhong Hui, Biao Chen, Bin Gan, Jianghua Shen
Summary: In this study, a cyclic oil quenching process was used to treat the common medium-carbon steel #45 steel, resulting in the formation of fine-grained structure. This structure exhibited a superior tensile strength of over 1690 MPa and moderate ductility. The refined grains and imbedded dislocations were found to be crucial in enhancing the strength. Furthermore, the material showed increased strength and ductility under dynamic tension due to the strain rate effect.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Xianzhe Shi, Xiuxia Wang, Biao Chen, Junko Umeda, Katsuyoshi Kondoh, Jianghua Shen
Summary: A bimodal grain structure was developed for commercial purity Ti (CP-Ti) through powder metallurgy processing, hot forging, and heat treatment. The bimodal grains significantly improved the yield strength of CP-Ti while maintaining the ultimate tensile strength and elongation to failure. The yield plateau observed in the bimodal CP-Ti was attributed to the accumulation of geometrically necessary dislocations at the interface between coarse and fine grains.
METALS AND MATERIALS INTERNATIONAL
(2023)
Article
Metallurgy & Metallurgical Engineering
Minjie Wang, Jianghua Shen, Biao Chen, Umeda Junko, Katsuyoshi Kondoh, Yulong Li
Summary: This study investigated the strain rate sensitivity, activation volume, and mobile dislocations in carbon nanotubes/aluminum composites through stress relaxation compression tests. The results showed that the addition of carbon nanotubes increased the strain rate sensitivity and improved the dislocation storage capability.
ACTA METALLURGICA SINICA-ENGLISH LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Jie Wan, Kangan Li, Huarui Geng, Biao Chen, Jianghua Shen, Yazhou Guo, Katsuyoshi Kondoh, Abdollah Bahador, Jinshan Li
Summary: Al4C3 nanorods were introduced into SLMed AlSi10Mg through in-situ chemical reaction to enhance the strain-hardening ability and delay fracture. The in-cell nanorods increased tensile strength by 15% and ductility by 78%. TEM analysis showed that they pinned and accumulated dislocations within cells, reducing stress concentration.
MATERIALS RESEARCH LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Xianzhe Shi, Xiuxia Wang, Biao Chen, Junko Umeda, Abdollah Bahador, Katsuyoshi Kondoh, Jianghua Shen
Summary: Oxygen is an effective strengthening element in titanium and its alloys, but excessive oxygen can lead to embrittlement. By studying the decomposition process of Ti oxides in a-Ti matrix at elevated temperatures, we can precisely control and push the limit of oxygen in Ti and its alloys. The results show that TiO particles decompose and oxygen atoms diffuse into the matrix. By incorporating 0.87 wt% oxygen, an ultra-high tensile strength of close to 1100 MPa can be achieved without sacrificing elongation-to-failure. The strength contribution from oxygen follows the Labusch law. These findings offer a novel approach to design high-performance Ti alloys with nontoxic and cheap elements.
MATERIALS & DESIGN
(2023)
Article
Engineering, Chemical
Lin Cao, Biao Chen, Jie Wan, Jianghua Shen, Shufeng Li, Shuiqing Liu, Jinshan Li
Summary: High energy ball milling (HEBM) is the most common method to disperse carbon nanotubes (CNTs) in aluminum (Al) powder for the development of high-performance Al matrix composites. However, the dispersion mechanism of CNTs in Al powder is still unclear due to difficulties in characterizing CNTs when buried inside Al powder particles. This study conducted transmission electron microscopy observation of CNTs in Al powder via HEBM with different milling times, revealing the breaking up of CNT clusters and subsequent cold-welding of Al flakes, resulting in re-spheroidization of Al powders and homogeneous dispersion of CNTs.
Article
Nanoscience & Nanotechnology
Siyu Lu, Shenglu Lu, Biao Chen, Ma Qian, Qiuming Wei, Katsuyoshi Kondoh, Jianghua Shen
Summary: In this study, in-situ high temperature electron back-scatter diffraction (HT-EBSD) was used to investigate the phase transformation in Grade 1 commercially pure titanium (CP Ti). The results showed that the transformation from alpha-Ti to beta-Ti followed the Burgers orientation relationship (BOR), while the transformation from beta-Ti to alpha-Ti during continuous cooling led to the formation of Type 2 alpha-variants that defied the BOR. This phenomenon, not reported before for CP Ti, was attributed to the fast cooling process and the lattice mismatch between the two phases.
SCRIPTA MATERIALIA
(2023)
Article
Engineering, Manufacturing
Jie Wan, Huarui Geng, Biao Chen, Jianghua Shen, Katsuyoshi Kondoh, Jinshan Li
Summary: In this study, the thermal stability of LPBFed AlSi10Mg was evaluated by exposing it to different temperatures for only 3 minutes. The results showed that LPBFed AlSi10Mg had relatively low thermal stability, with even a short exposure at 200 degrees Celsius leading to a dramatic deterioration in tensile strength. The microstructural analysis revealed that the microstructure of as-built AlSi10Mg underwent a similar evolution to that of annealed cold-worked metals, which was attributed to the excessive energy stored in the as-built microstructure due to fast cooling during LPBF.
VIRTUAL AND PHYSICAL PROTOTYPING
(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)
