Article
Engineering, Mechanical
Ding Tang, Kecheng Zhou, Weiqin Tang, Peidong Wu, Huamiao Wang
Summary: This study investigates the bending behavior of magnesium (Mg) alloys through four-point bending tests and various measurement techniques. The research reveals the inhomogeneous and anisotropic mechanical response of Mg alloys under bending, and proposes a crystal plasticity-based approach to describe their deformation behavior. The insights from this study offer new possibilities for designing and controlling gradient twinning structures to optimize the properties of Mg alloys.
INTERNATIONAL JOURNAL OF PLASTICITY
(2022)
Article
Chemistry, Physical
Chaitanya Paramatmuni, Anil Bandi, Anand K. Kanjarla
Summary: The ductility of Magnesium alloys is often limited by the strong basal texture. Previous attempts to reduce the intensity of basal textures involved adding rare earth (RE) elements. However, due to cost and scarcity, alloys with calcium and tin have recently been introduced. Among them, Mg-2Sn-2Ca alloys have shown high strength in extruded condition. This study reports the mechanical properties of the alloy in sheet form for the first time, examining in-plane mechanical anisotropy, texture, microstructure, and deformation twins.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
H. Qiao, Y. Fu, X. C. Sun, H. Wang, D. Y. Li, Y. H. Peng, P. D. Wu
Summary: The orientation distribution of grains plays a decisive role in the performance of polycrystalline materials, especially those with low crystallographic symmetry. A reliable twinning model is essential for the design and service of zirconium alloys. In this study, two twinning models were implemented and evaluated, with the TDT model showing superior performance in predicting texture development.
JOURNAL OF NUCLEAR MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Morteza Tayebi, Hamidreza Najafi, Said Nategh, Alireza Khodabandeh
Summary: The creep properties of ZK60 alloy and ZK60/SiCw composite were studied after extrusion and precipitation hardening using accelerated creep tests. Different stress exponents were observed for the alloy and composite at low and high stresses, indicating a shift in creep mechanism from grain boundary sliding to dislocation creep. Fracture surface examination showed that cavity nucleation around grain corners and precipitates was the main cause of creep failure.
METALS AND MATERIALS INTERNATIONAL
(2021)
Article
Engineering, Mechanical
Liansong Dai, Weidong Song
Summary: This study proposes a novel crystal plasticity model to describe the mechanical behavior and microstructure evolution of HCP materials. A new flow rule is developed to incorporate the effects of strain rate and temperature on the activation of specific deformation mechanisms. Numerical simulations show that increasing strain rate or decreasing temperature promotes twinning over slip, resulting in more pronounced hardening and higher stress levels.
INTERNATIONAL JOURNAL OF PLASTICITY
(2022)
Article
Materials Science, Multidisciplinary
Xiaoqian Guo, Yao Cheng, Yunchang Xin, Wei Wu, Chao Ma, Ke An, Peter K. Liaw, Peidong Wu, Qing Liu
Summary: This study investigated the low-cycle fatigue behavior of strongly-textured Mg alloys through numerical simulations and in-situ neutron diffraction experiments. The results demonstrate the effectiveness of the used model in simulating the low-cycle fatigue behavior of Mg alloys. Additionally, the study revealed a specific evolution trend of the maximum twin volume fraction with fatigue cycles.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2022)
Article
Nanoscience & Nanotechnology
Chunyu Wang, Yuxiu Zhang, Qinghuan Huo, Zhirou Zhang, Jiao Tang, Aki Hashimoto, Xuyue Yang
Summary: This study investigated the effects of twinning time node on the creep resistance of an extruded Mg-2wt%Y sheet. Pre-compression with a low strain before creep resulted in a large amount of {10 (1) over bar2} twins, impacting the creep resistance of the samples. The dominant creep mechanisms differed between samples with and without pre-compression, with the presence of twins affecting the creep rate.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Engineering, Mechanical
Xiaodan Zhang, Shangming Li, Xiaoqian Guo, Huamiao Wang, Qin Yu, Peidong Wu
Summary: In this study, an elastic visco-plastic self-consistent model with twinning and detwinning scheme, along with a torsion specific finite element approach, is used to simulate the deformation behavior of magnesium alloy solid rod with different initial textures. It was found that the deformation mechanisms, stress-strain response, Swift effect, and deformation texture vary significantly with different initial textures and loading paths, highlighting the importance of understanding the influence of these factors on mechanical properties.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2021)
Article
Metallurgy & Metallurgical Engineering
Weiqin Tang, Jeong Yeon Lee, Huamiao Wang, Dirk Steglich, Dayong Li, Yinghong Peng, Peidong Wu
Summary: The unloading behaviors of the rare-earth magnesium alloy ZE10 sheet were studied using mechanical tests and crystal plasticity modeling. The study found significant anisotropy and loading path dependency in the unloading behaviors of ZE10 sheets. Inelastic strains varied under different loading conditions, with basal slip, twinning, and de-twinning being responsible for the behaviors.
JOURNAL OF MAGNESIUM AND ALLOYS
(2021)
Article
Metallurgy & Metallurgical Engineering
Xianyun Zhu, Yuqian Wang, Luiz Carneiro, Huamiao Wang, Yanyao Jiang
Summary: Comprehensive experiments were conducted on a rolled AZ31B Mg thick plate and a tubular specimen to evaluate the elastic-viscoplastic self-consistent model with twinning and detwinning (EVPSC-TDT) on magnesium alloys. The model accurately predicted stress-strain curves, hardening rates, textures after fracture, and tension twin evolutions for different loading conditions. The experiment also observed the Swift effect, which was properly simulated by the model.
JOURNAL OF MAGNESIUM AND ALLOYS
(2023)
Article
Nanoscience & Nanotechnology
Karol Frydrych, Tomasz Libura, Zbigniew Kowalewski, Michal Maj, Katarzyna Kowalczyk-Gajewska
Summary: The paper presents an experimental and numerical study on the deformation mechanisms in the AZ31B magnesium alloy sheet under cyclic in-plane tensile-compressive deformation, focusing on the influence of slip, twinning, and detwinning on mechanical response and texture evolution. A crystal plasticity model accounting for twinning and detwinning is formulated and identified using an evolutionary algorithm, with discussion on the predicted activity of deformation mechanisms in relation to experimental data.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Behnam Ahmadikia, Leyun Wang, M. Arul Kumar, Irene J. Beyerlein
Summary: By using mechanical testing, scanning electron microscopy, and a unified crystal plasticity framework, this study examines the intense and localized slip bands on prismatic planes and {1012} 1011 tensile twins in commercially pure titanium, as well as their transmission across grain boundaries. The results demonstrate that the orientation and curvature of the grain boundaries significantly affect the local stress fields and consequently the transmission of slip/twin. The neighboring grain properties, including active slip systems, slip bands, and twins, also play a crucial role in the deformation mechanisms.
Article
Nanoscience & Nanotechnology
Jiaxiang Li, Qinghuan Huo, Chunyu Wang, Yuxiu Zhang, Zhirou Zhang, Gang Feng, Xuyue Yang
Summary: The results of the study demonstrated a clear tension-compression asymmetry in the creep behavior of the alloy under tensile and compressive creep loading along the rolling direction and the normal direction. Twinning played a role in deteriorating the creep resistance of certain samples and causing asymmetrical behavior in the results. The T-RD sample showed the best creep resistance, while the C-ND sample followed, with the C-RD and T-ND samples showing similarly poor creep resistance.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Krishna Yaddanapudi, Brandon Leu, M. Arul Kumar, Xin Wang, Julie M. Schoenung, Enrique J. Lavernia, Timothy J. Rupert, Irene J. Beyerlein, Subhash Mahajan
Summary: This study investigated {(1) over bar 012} tensile twins terminating inside the grains of a deformed Mg-Y alloy using transmission electron microscopy. Crystallographic features of the terminating twins and associated slip structures were quantified and analyzed, with local stresses computed using crystal plasticity simulations. Basal < a > and < c + a > matrix glide were found to accommodate the plastic stresses near the terminating twins, with defect contrast consistent with lattice dislocations and twinning partials observed along the twin boundary. A dislocation reaction was proposed to establish the interrelationship between matrix glide and {(1) over bar 012} twinning in Mg-Y alloys.
Article
Nanoscience & Nanotechnology
Xiongpeng Zhou, Hongge Yan, Jihua Chen, Weijun Xia, Bin Su, Xinyu Li, Wensen Huang, Min Song
Summary: By introducing beta(1)' (MgZn2) precipitates through solution treatment and subsequent aging, a new approach has been discovered to improve the damping capacity and mechanical properties of ZK60 magnesium alloy. The coherent orientation relationships between the beta(1)' phase and the a-Mg matrix, as well as the shearing or bypassing of dislocations on the beta(1)' precipitates depending on their sizes and spacing, contribute to the synchronous improvement in mechanical and damping properties of the alloy. The modified Granato-Lucke (G-L) model presented in this work analyzes the favorable damping capacity of the aged ZK60 alloy, where the interaction between the beta(1)' precipitates and the mobile dislocations serves as a new source of energy dissipation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Metallurgy & Metallurgical Engineering
Qingshan Yang, Bin Jiang, Bo Song, Zujian Yu, Dewei He, Yanfu Chai, Jianyue Zhang, Fusheng Pan
Summary: Controlling grain orientation through twinning activity is crucial for understanding the deformation mechanism of Mg alloy sheets. Precompression can generate {10-12} twin-texture components, providing an alternative way to improve the formability of Mg alloy sheets.
JOURNAL OF MAGNESIUM AND ALLOYS
(2022)
Article
Chemistry, Physical
Zhaoshun Gao, Tingting Zuo, Meng Wang, Ling Zhang, Bo Da, Yadong Ru, Jiangli Xue, Yue Wu, Li Han, Liye Xiao
Summary: The in-situ growth of high quality graphene in copper through vacuum hot-press sintering with liquid paraffin results in copper-based materials with high electrical conductivity and strength. Further improvement in performance is achieved through elaborate structure design and morphology control of graphene, enhancing the properties of the material.
Article
Materials Science, Multidisciplinary
Yuhang Du, Deyu Ding, Limin Lai, Siming Xiao, Ning Guo, Bo Song, Shengfeng Guo
Summary: The addition of reactive element Y can significantly improve the high-temperature oxidation resistance of CrMoTaTi high-entropy alloys, lowering the critical concentration of Cr required for the formation of Cr2O3 on the alloy surface. The Y-bearing RHEAs exhibited good oxidation resistance even when subjected to oxidation at 1000 degrees C for 100 hours, suggesting a positive role of reactive elements in enhancing the oxidation resistance of RHEAs.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2022)
Article
Materials Science, Ceramics
Meifang Tang, Limin Lai, Deyu Ding, Tianhao Liu, Weizhi Kang, Ning Guo, Bo Song, Shengfeng Guo
Summary: Amorphous alloys have shown excellent catalytic performance in the degradation of azo dye wastewater, but high degradation efficiency and reusability have been unsatisfactory for a long time. In this study, a new Co-Mo-B amorphous alloy wire was reported, which exhibited rapid degradation and excellent reusability. These findings provide a new idea for the development of amorphous alloys in the degradation of azo dye wastewater.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Materials Science, Multidisciplinary
Tingting Liu, Yanglu Liu, Lu Xiao, Shibo Zhou, Bo Song
Summary: The concentration of Al in Mg-Al binary alloys can significantly affect the grain refinement and solution strengthening, resulting in improved tensile yield strength and elongation. Moreover, the viscoplastic self-consistent (VPSC) model can accurately predict the activation and evolution of deformation modes.
Article
Chemistry, Physical
Yingchen Wang, Daixiu Wei, Liqiang Wang, Ling Zhang, Jia Liu, Yujin Tang, Yuanfei Fu, Weijie Lu
Summary: This study investigates the microstructure evolution and deformation behavior of graphene-based TiC/Ti6Al4V composites processed by friction stir processing. The results reveal uniform microstructure in the stir zone and distinct microstructures at different depths from the processed surface. Special crystallographic orientation relation is observed, and the hardness distribution is found to vary with depth.
APPLIED SURFACE SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
J. R. Li, D. S. Xie, Z. R. Zeng, B. Song, H. B. Xie, R. S. Pei, H. C. Pan, Y. P. Ren, G. W. Qin
Summary: Adding a small amount of Ce element in magnesium alloy can significantly promote the formation of pyramidal and non-basal dislocations, thereby enhancing the formation and recrystallization process of subgrain boundaries, resulting in a bimodal microstructure.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Nanoscience & Nanotechnology
Zhe Yu, Junqi Qiu, He Li, Pengzhan Cai, Ling Zhang, Xiaoxiao Fu, Jinsan Wang, Namin Xiao
Summary: The mechanical properties and thermal stability of Al-Cu-Mg-Ag alloy prepared by friction stir processing and subsequent aging were studied. The mechanical properties in the stir zone were significantly improved after peak aging treatment, while plasticity remained the same. Increasing the rotational speed improved the mechanical properties of the stir zone and enhanced age-hardening response. Heat exposure caused a more drastic decrease in the mechanical properties of the stir zone compared to the base material due to the promotion of elemental diffusion and precipitation coarsening.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Nanoscience & Nanotechnology
Hui Wang, Zhaoxi Cao, Ziyuan Gao, Cunyu Wang, Jianxiong Liang, Andy Godfrey, Ling Zhang, Guilin Wu, Wenquan Cao
Summary: The deformation response of a (Nb, V) micro-alloyed FeMnAlC low density steel has been investigated as a function of grain size. Tensile testing and electron microscopy were used to characterize the mechanical properties and microstructure. The results show that the yield stress is strongly dependent on the initial grain size, while the friction stress and Hall-Petch slope vary with the level of applied tensile strain. Based on these findings, a model is proposed to simulate the stress-strain curves during tensile deformation of the low-density steel.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Nanoscience & Nanotechnology
Xiaowei Cheng, Pengzhan Cai, Ling Zhang, Linjiang Chai
Summary: Three types of heterogeneously structured high purity Ti samples were created using laser surface treatment. Tensile testing was performed to evaluate their mechanical properties. The iso-stressed type specimen showed the best performance, potentially due to lower stress and strain concentrations. Microstructure analysis and simulation results supported this observation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Multidisciplinary Sciences
Hongwei Cheng, Xiaoxia Zhu, Xiaowei Cheng, Pengzhan Cai, Jie Liu, Huijun Yao, Ling Zhang, Jinglai Duan
Summary: The authors report on the fabrication of gold and copper quasi-BCC nanolattices with beam diameters as low as 34 nm, which exhibit ultrahigh energy absorption capacity and compressive yield strengths exceeding their bulk counterparts. The exceptional energy absorption capacities of these quasi-BCC nanolattices stem from the high mechanical strength and plasticity of metals, size reduction-induced mechanical enhancement, and the quasi-BCC nanolattice architecture.
NATURE COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Zhe Yu, He Li, Pengzhan Cai, Xiaoxiao Fu, Zongqiang Feng, Ling Zhang, Jinsan Wang, Namin Xiao
Summary: In this study, the evolution of U plates during artificial aging was investigated, and the effects of peak-aging and over-aging treatments on the thermal stability of Al-Cu-Mg-Ag alloy were analyzed. The results showed that the over-aged sample had a narrower diameter distribution of U plates, which suppressed Ostwald ripening. Additionally, the U plates in the over-aged sample had a larger aspect ratio, making them more susceptible to inhibition by soft impinge. Quantitative analysis revealed that the over-aged sample exhibited higher yield strength contributed by U plates compared to the peak-aged sample. This study demonstrates that improved thermal stability can be achieved at the expense of slight loss in room temperature mechanical properties, enhancing the application potential of Al-Cu-Mg-Ag alloys.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Chemistry, Physical
Hongbing Chen, Zhikang Shen, Bo Song, Jia She
Summary: In this study, the influence of pre-tension on the torsion behavior, compression mechanical properties, and micro-hardness of an extruded AZ31 Mg alloy was investigated. The results showed that pre-tension significantly increased dislocation strengthening and torsion yield strength. Texture in the sample's cross-section could be rotated by about 30 degrees due to free-end torsion. Both pre-tension and torsion led to dislocation strengthening, increasing micro-hardness and compressive yield stress.
Article
Materials Science, Multidisciplinary
Xiaojuan Jiang, Mengjun Hu, Qiongyao He, Pengzhan Cai, Ling Zhang
Summary: In this study, multilayered pure aluminum sheets with different cycle ARB processed layers were prepared by accumulative roll bonding process and further annealed. The experimental results showed that the ARB6/3/6 aluminum exhibited high tensile strength and elongation.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Chemistry, Physical
Qiongyao He, Xiaojuan Jiang, Pengzhan Cai, Ling Zhang, Tao Sun, Xiaokui Yang, Kun Zhou, Lunwu Zhang
Summary: Interstitial free steels with different grain sizes and textures were prepared through cold-rolling and annealing processes. It was found that the increase in the volume fraction of recrystallized grains and the decrease in stored energy resulted in the enhancement of corrosion resistance.
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)
