Article
Chemistry, Physical
Yongkang Tan, Rongjie Zhuang, Guanlin Yang, Xiaoma Tao, Hongmei Chen, Yifang Ouyang, Yong Du
Summary: In this study, the solid-solid diffusion reaction and growth kinetics of the Ni-Zn system were investigated using diffusion couple technique. Three intermetallic compounds were observed in the diffusion zone, and the growth process was dominated by volume diffusion. The Young's modulus and hardness of the IMCs were evaluated from nanoindentation testing, showing that the properties varied with the Zn concentration. The calculated Young's modulus from first-principles calculations was consistent with experimental results.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Ke Liu, Huichen Yu, Xing Li, Sujun Wu
Summary: Experimental investigation of reaction diffusion kinetics in Al-Cu binary systems at solid-state temperatures revealed the formation of intermetallic compounds with different compositions, showing parabolic growth in thickness. Quantitative analysis of the composition and characterization of properties using electron probe microanalysis and nanoindentation techniques were conducted to evaluate diffusion coefficients, activation energies, hardness, Young's modulus, and creep stress index of the IMCs.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Jun Wang, Liyang Fang, Xiaoning Li, Fali Liu, Xiancong He, Guanglong Xu, Yulu Zhou, Xiaoma Tao, Yifang Ouyang, Yong Du
Summary: This study systematically investigated the diffusion behaviors and mechanical properties of Zr-X (X=Nb, Ta, Hf) systems. The interdiffusion coefficients and impurity diffusion coefficients of Zr-rich alloys were evaluated and the diffusion activation energies were calculated. The hardness and Young's modulus of Zr-X were obtained through nanoindentation testing.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Mariane de Toledo Lima Thome, Ana Sofia C. M. d'Oliveira
Summary: Enhanced understanding of NbSi2 alloys is crucial for better control of their properties and performance. This study investigated the relationship between processing conditions and properties of NbSi2 processed by solid-state diffusion. The results showed the formation of hypo-stoichiometric NbSi2 compounds and an increase in lattice distortion with reduced Si availability during processing.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2022)
Article
Chemistry, Physical
Xiao Liu, Baishan Chen, Siyuan Wu, Yunzhu Ma, Siwei Tang, Zhenggang Wu, Yufeng Huang, Wensheng Liu
Summary: The study investigated the microstructure and mechanical properties of aged Au80Sn20/CrMnFeCoNi solder joints. Results showed an increase in intermetallic compound thickness and size of Co3Fe7 nanoparticles with extended aging time, while Vickers hardness and shear strength continuously decreased.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Thermodynamics
Xiaoning Li, Liyang Fang, Chenran Xu, Yulu Zhou, Ya Liu, Guanglong Xu, Xiaoma Tao, Yifang Ouyang, Yong Du
Summary: Diffusion behaviours and mechanical properties of the Hf-X (X = Nb, Ta) systems were investigated using diffusion couples in the temperature range from 1150°C to 1500°C. The interdiffusion coefficients of the Hf-X (X = Nb, Ta) systems decreased as the Nb or Ta content increased, while the diffusion activation energies increased. Nanoindentation tests determined the hardness and Young's moduli of the Hf-Nb and Hf-Ta systems.
CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY
(2023)
Article
Materials Science, Multidisciplinary
Fali Liu, Liyang Fang, Zhiying Li, Yongkang Tan, Jiang Wang, Xiancong He, Guanglong Xu, Yifang Ouyang, Xiaoma Tao
Summary: The solid-solid diffusion reaction and growth kinetics of the Mg-Ce system were investigated using diffusion coupling technique. Four intermetallic compounds (Mg12Ce, Mg41Ce5, Mg3Ce, MgCe) and one solid solution phase (δCe) were observed in the diffusion zone at temperatures ranging from 673 K to 823 K. The growth process in the diffusion area was mainly controlled by bulk diffusion. The diffusion activation energy of Mg3Ce was found to be the highest among the intermetallic compounds. The mechanical properties of the intermetallic compounds were characterized using nanoindentation and first-principles calculations, showing that Mg12Ce had the highest Young's modulus (66.08 GPa) and hardness (2.14 GPa). The obtained diffusion kinetic properties and mechanical properties of the Mg-Ce system provide valuable data for the development of new magnesium-rare earth alloys.
Article
Chemistry, Physical
Anna Knaislova, Vendula Simunkova, Pavel Novak, Filip Prusa, Marcello Cabibbo, Lucyna Jaworska, Dalibor Vojtech
Summary: Intermetallic alloys based on Ti-Al-Si system are significant for their excellent high-temperature properties, but high brittleness at room temperature is a main concern. Adding alloying elements has been attempted to improve the properties, but porous microstructure remains a challenge.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Tiffany Wu, David C. Dunand
Summary: This study investigates the microstructure and thermomechanical properties of Al11Ce3, an intermetallic compound that strengthens Al-Ce based eutectic alloys. The results show that Al11Ce3 is hard and brittle, with coarse and elongated grains and internal twins. The thermal expansion coefficient and oxidation kinetics of Al11Ce3 vary with temperature. At 500 degrees C, Al11Ce3 exhibits extensive plastic creep deformation. The study also found that the creep resistance of Al11Ce3 at 500 degrees C is similar to that of L1(2)-Al3Sc.
Article
Thermodynamics
Jun Wang, Liyang Fang, Xiaoning Li, Chenran Xu, Xiancong He, Guanglong Xu, Xiaoma Tao, Yifang Ouyang, Yong Du
Summary: Diffusion behavior and mechanical properties of the Zr-Nb-Ta system were analyzed using diffusion couple technology and nanoindentation technology. The compositional profile of the diffuse region was obtained and diffusion coefficients were calculated. The hardness, Young's modulus, wear resistance, and resistance to plastic deformation of the Zr-Nb-Ta alloy were evaluated. These findings provide insights for the development of Zr-Nb-Ta based alloys with excellent properties.
CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY
(2022)
Article
Metallurgy & Metallurgical Engineering
Hao-qin Lin, Jin-feng Ling, Wei-min Chen, Yao Wang, Xiao-ke Wu, Li-jun Zhang
Summary: The mechanical and diffusion properties of Ti-Ta-Fe alloys in the Ti-rich region were investigated using a high-throughput method, nanoindentation, and diffusion couple techniques. A composition-dependent database was established to study the processability of Ti alloys, and it was found that the Fe content should be controlled for Ti alloys with high hardness and low Young's modulus.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2022)
Article
Chemistry, Physical
Yao Wang, Yufeng Huang, Wensheng Liu, Yong Zhang, Jiayi Liu, Wenyang Liu, Yunzhu Ma
Summary: The addition of tantalum to tungsten-nickel-iron alloys can improve their performance, but the diffusion-reaction between nickel and tantalum during high-temperature sintering leads to the formation of various intermetallic compounds that negatively affect the structure and properties of the tungsten alloy. The diffusion of tantalum-nickel is stronger than that of tungsten-nickel at the same temperature. The formation of an effective bond between nickel and tantalum is difficult at temperatures below 1200℃, resulting in the generation of layered NiTa2, NiTa, Ni2Ta, and Ni3Ta phases. At 1400℃, a violent liquid phase diffusion occurs between nickel and tantalum, producing a large amount of NiTa and Ni2Ta phases. The appearance of the NiTa phase in the tungsten alloy significantly reduces its toughness and increases the risk of brittle fracture.
Article
Chemistry, Physical
Zhuhao Wen, Yongzhe Wang, Jinfeng Ling, Weimin Chen, Lijun Zhang, Yong Du
Summary: Integrating various techniques can map the mechanical and diffusion properties of multicomponent alloys, which is crucial for alloy selection. This study established the composition-mechanical property relationships in the Ti-Nb-Zr-Hf system and determined the inter-diffusion coefficients of Ti-Nb-Zr-Hf alloys, providing valuable information for biomedical applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Review
Materials Science, Multidisciplinary
Yu-ting Wu, Chong Li, Ye-fan Li, Jing Wu, Xing-chuan Xia, Yong-chang Liu
Summary: The heat treatment of Ni3Al-based alloys significantly influences the microstructure of the alloys and desirable mechanical properties can be achieved through heat treatment. Additionally, the evolution of secondary phases during heat treatment, including the kinetics of precipitate growth, and the effects of heat treatment on the mechanical properties of the alloys are discussed.
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2021)
Article
Chemistry, Physical
Xunda Liu, Hiroaki Tatsumi, Zhi Jin, Zhong Chen, Hiroshi Nishikawa
Summary: To ensure optimal working conditions for next-generation power modules, it is crucial to have a comprehensive understanding of the thermo-mechanical properties of the joint layer between the chip and substrate. This study proposes a straightforward method to fabricate densified and pure Ag9In4 bulk samples, which can be a promising candidate for the joint layer. The properties of Ag9In4, including Young's modulus, hardness, creep behavior, and coefficient of thermal expansion, were measured over a temperature range of 30°C to 250°C.
Article
Chemistry, Physical
Kuixin Lin, Yongkang Tan, Hongmei Chen, Xiaoma Tao, Yifang Ouyang, Yong Du
Summary: In this study, molecular dynamics simulations were conducted to investigate the shock-wave propagation in nanocomposites consisting of different low-dimensional carbon materials (FCC-C60, MCNT, or MGNS) and monocrystal Al. The results revealed the intrinsic correlation between their phononic characteristics and shock-wave energy absorption. It was found that MCNT exhibited superior elastic absorption, reducing the shock-wave intensity by 80%. The dispersion mechanism mediated by the interaction between mid-frequency phonons and shock-wave played a significant role in absorbing large amounts of shock-wave energy. Additionally, the dissipation mechanism arising from thermal phonon scattering and interfacial phonon damping contributed to the energy absorption process.
Article
Polymer Science
Sheng-Li Wu, Junfei Qiao, Jintao Guan, Hong-Mei Chen, Tielin Wang, Cunwen Wang, Yi Wang
Summary: The advent of nascent d-UHMWPE has overcome the intrinsic defects of commercial UHMWPE products and provides access to high value-added materials with improved qualities. The synthesis of d-UHMWPE can be achieved using either single site catalysts or heterogeneous solid catalysts, resulting in a much easier processability. The processed d-UHMWPE demonstrates superior drawability, flexibility, toughness, and thermal conductivity, making it suitable for various applications.
EUROPEAN POLYMER JOURNAL
(2023)
Article
Automation & Control Systems
Jihong Wan, Hongmei Chen, Tianrui Li, Zhong Yuan, Jia Liu, Wei Huang
Summary: This paper proposes a novel interactive and complementary feature selection approach based on a fuzzy multineighborhood rough set model. The approach effectively improves the classification performance of feature subsets while reducing the dimension of feature space.
IEEE TRANSACTIONS ON CYBERNETICS
(2023)
Article
Engineering, Environmental
Chen Zhao, Xinyue Xu, Hongmei Chen, Fengwen Wang, Penghui Li, Chen He, Quan Shi, Yuanbi Yi, Xiaomeng Li, Siliang Li, Ding He
Summary: Photochemical reactions are important in altering the chemistry of dissolved organic matter (DOM). This study used machine learning to integrate existing irradiation experiments and gain new insights into the transformation processes of estuarine DOM. Irradiation experiments provide valuable information on the photochemical reactivity of molecules, but the inconsistent fate of irradiated molecules in different experiments hinders our understanding of the roles played by photochemical reactions, which cannot be properly addressed by traditional approaches.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Polymer Science
Junhao Liu, Wanting Wei, Feng Cao, Zhiyong Zeng, Kun Qian, Hongmei Chen, Fenghua Zhang, Wenbing Li
Summary: Inspired by nature, scientists have developed surfaces with controllable wettability through alterations in surface micro/nanostructures or changes in chemical compositions. This article reports the control of surface wettability using three types of shape-memory micropatterns that can be reversibly transformed between a stretched and an original/recovered state due to the shape-memory properties of poly (ethylene-co-vinyl acetate) (EVA). The study also demonstrates that surface wettability can be controlled by the reversible transformation of surface micropatterns.
EUROPEAN POLYMER JOURNAL
(2023)
Article
Biochemistry & Molecular Biology
Di Gu, Wen Qin, Sumei Hu, Rong Li, Xingyuan Chen, Xiaoma Tao, Yifang Ouyang, Weiling Zhu
Summary: In this study, first principle calculations were used to investigate the stability and photocatalytic properties of a two-dimensional polar monolayer SiTe as a potential catalyst for water-splitting. The results showed that the polar monolayer SiTe has an indirect band gap of 2.41 eV, a polarization electric field, a wide absorption region, and suitable band alignment for photocatalytic water-splitting. It was also found that strain engineering, particularly compressive strain in the range of 1% to 3%, can enhance the photocatalytic activity of the polar monolayer SiTe. Overall, the findings suggest that the polar monolayer SiTe has the potential to be a promising catalyst for visible light photocatalytic water-splitting.
Article
Public, Environmental & Occupational Health
Yuanxia Liu, Hongmei Chen, Mengtian Zhang, Gangjiao Zhu, Yan Yang, Yuanyuan Li, Wei Lu, Hongling Zhang
FRONTIERS IN PUBLIC HEALTH
(2023)
Article
Agronomy
Hongmei Chen, Yongyi Fan, Dian Li, Zhihao Sun, Zheyan Ruan, Huali Yang, Yiwei Kang, Weixun Wu, Qunen Liu, Xiaodeng Zhan, Liyong Cao, Ming Zhou, Shihua Cheng, Yingxin Zhang
Summary: Through the study of 76 CSSLs, four QTLs controlling tiller number in rice were identified, with two of them previously detected. Further validation and fine mapping narrowed down these QTLs to specific chromosomal regions and identified two novel genes, providing valuable insights into the regulatory mechanism of tiller number in the ZH9308 variety and its application in super-hybrid breeding.
Article
Computer Science, Artificial Intelligence
Binbin Sang, Lei Yang, Hongmei Chen, Weihua Xu, Xiaoyan Zhang
Summary: This paper proposes a robust fuzzy dominance rough set model to tackle noise interference and develops a feature selection method based on this model for ordinal classification tasks. The robust model is constructed using a non-linear vague quantifier and related dependency function, while the contribution of feature combinations for ordinal classification is characterized using rank entropy-based uncertainty measures. A new feature evaluation index and corresponding feature selection algorithm are also presented. Numerical experiments demonstrate the effectiveness of the proposed model and feature selection method.
EXPERT SYSTEMS WITH APPLICATIONS
(2023)
Article
Computer Science, Artificial Intelligence
Jihong Wan, Hongmei Chen, Tianrui Li, Min Li, Xiaoling Yang
Summary: Feature selection is crucial in data mining and knowledge discovery. Existing methods often overlook high-order interactions among variables, resulting in the loss of important dependency information. To address this, a robust knowledge metric approach is proposed to perceive and excavate the hidden latent information.
PATTERN RECOGNITION
(2023)
Article
Physics, Multidisciplinary
Weining Tan, Shaolong Zheng, Yulu Zhou, Xiaoping Wei, Ligang Zhang, Xiaoma Tao, Yifang Ouyang
Summary: The structural, mechanical, lattice-dynamic, anisotropic, electronic, and thermal properties of M2SX (M=Sc, Y; X=B, C, N) were studied using density functional theory. The results show that all phases meet the criteria for thermodynamic, mechanical, and dynamic stability. Sc2SN exhibits the highest bulk modulus, shear modulus, and Young's modulus, indicating a brittle behavior. The elastic anisotropy of M2SX shows that Sc2SC is the most isotropic among the six phases. Sc2SC and Y2SC are identified as indirect-bandgap semiconductors, while the other phases exhibit metallic characteristics. The calculated data provide valuable guidance for future development and research on S-based MAX phases.
Article
Materials Science, Multidisciplinary
Fali Liu, Liyang Fang, Zhiying Li, Yongkang Tan, Jiang Wang, Xiancong He, Guanglong Xu, Yifang Ouyang, Xiaoma Tao
Summary: The solid-solid diffusion reaction and growth kinetics of the Mg-Ce system were investigated using diffusion coupling technique. Four intermetallic compounds (Mg12Ce, Mg41Ce5, Mg3Ce, MgCe) and one solid solution phase (δCe) were observed in the diffusion zone at temperatures ranging from 673 K to 823 K. The growth process in the diffusion area was mainly controlled by bulk diffusion. The diffusion activation energy of Mg3Ce was found to be the highest among the intermetallic compounds. The mechanical properties of the intermetallic compounds were characterized using nanoindentation and first-principles calculations, showing that Mg12Ce had the highest Young's modulus (66.08 GPa) and hardness (2.14 GPa). The obtained diffusion kinetic properties and mechanical properties of the Mg-Ce system provide valuable data for the development of new magnesium-rare earth alloys.
Article
Computer Science, Artificial Intelligence
Chuan Luo, Sizhao Wang, Tianrui Li, Hongmei Chen, Jiancheng Lv, Zhang Yi
Summary: This paper presents parallel feature selection algorithms based on the rough hypercuboid approach to handle growing data volumes. Experimental results show that our algorithms are significantly faster than the original sequential counterpart while guaranteeing result quality. Moreover, the proposed algorithms can effectively utilize distributed-memory clusters to handle computationally demanding tasks.
IEEE TRANSACTIONS ON KNOWLEDGE AND DATA ENGINEERING
(2023)
Article
Engineering, Multidisciplinary
Hong-Mei Chen, Hai-Wen Xu, Jun-Feng Yang
Summary: This paper considers a class of structured convex optimization problems in image processing, proposes a hybrid algorithm tailored for these problems, and tests its effectiveness under Poisson noise.
JOURNAL OF INDUSTRIAL AND MANAGEMENT OPTIMIZATION
(2023)
Article
Computer Science, Artificial Intelligence
Chuan Luo, Sizhao Wang, Tianrui Li, Hongmei Chen, Jiancheng Lv, Zhang Yi
Summary: This article proposes a novel global search method for numerical feature selection, RH-BPSO, based on the hybridization of the rough hypercuboid approach and binary particle swarm optimization (BPSO) algorithm. Parallelization approaches for large-scale datasets are also presented by decomposing and recombining hypercuboid equivalence partition matrix. The experimental results indicate that RH-BPSO outperforms other feature selection algorithms in terms of classification accuracy, the cardinality of the selected feature subset, and execution efficiency. Moreover, the distributed meta-heuristic optimized rough hypercuboid feature selection algorithm, DiRH-BPSO, is significantly faster than its sequential counterpart and can handle large-scale feature selection tasks on distributed-memory multicore clusters.
IEEE TRANSACTIONS ON NEURAL NETWORKS AND LEARNING SYSTEMS
(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)
