Article
Materials Science, Multidisciplinary
Wenna Jiao, Tianxin Li, Guomao Yin, Tao He, Tingju Li, Yiping Lu
Summary: A novel Al20Co36Cr4Fe4Ni36 eutectic high entropy alloy (EHEA) with superior mechanical properties at both room temperature and high temperatures was designed and prepared in this study. The EHEA consists of a L12 phase and a B2 phase, exhibiting high tensile strength and ductility at room temperature and high compressive strength at high temperatures without fracture. The hot deformation behavior and microstructure evolution of the new EHEA were investigated, and continuous dynamic recrystallization (CDRX) was identified as the primary dynamic recrystallization mechanism.
MATERIALS CHARACTERIZATION
(2023)
Article
Nanoscience & Nanotechnology
Linxiang Liu, Zhijun Wang, Qingfeng Wu, Yuhao Jia, Q. Xu, Feng He, Junjie Li, Jincheng Wang
Summary: A dual-phase high entropy alloy with FCC and B2 matrix was developed, showing excellent high-temperature mechanical properties. The hierarchical microstructure contributed to high yield strength and good tensile elongation at a wide temperature range, making it a potential material for high-performance applications.
SCRIPTA MATERIALIA
(2023)
Article
Nanoscience & Nanotechnology
Lu Zhang, Li Zhang, Hao Wang, Jianbo Li, Jiale Man, Zaidong Xu, Jianxin Yu, Gang Wan, Wei Wang, Baolin Wu
Summary: This study examined the evolution of microstructure and mechanical properties of a high-entropy alloy and provided valuable insights on predicting sigma-phase formation in alloy design. Interaction between alloying elements and principal elements can affect recrystallization, leading to formation of partially recrystallized microstructures across a wider temperature range. Control of the proportion of recrystallized and non-recrystallized grains is crucial in managing strength and ductility, with factors like sigma particles and deformation twinning influencing alloy characteristics.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
D. D. Ben, H. J. Yang, Y. A. Dong, Y. Z. Tian, S. J. Sun, L. X. Meng, Q. Q. Duan, P. Zhang, Z. F. Zhang
Summary: The microstructural evolutions of a cold-rolled CoCrFeMnNi high-entropy alloy induced by electropulsing treatment at room temperature and liquid nitrogen temperature were studied and compared. Compared to room temperature electropulsing treatment, finer recrystallized grains were obtained by liquid nitrogen electropulsing treatment. The nucleation of grains was mainly promoted by the athermal effect of electropulsing, while the new grain growth was mainly influenced by the thermal effect. Furthermore, electropulsing greatly suppressed the precipitation of the Cr-rich phase, contrary to the annealing samples. The liquid nitrogen electropulsing treatment with a discharging voltage of 6 kV resulted in the highest yield strength (846 MPa) among the electropulsing treated samples due to the partially recrystallized heterogeneous microstructure. Therefore, liquid nitrogen electropulsing treatment shows potential for fabricating desired microstructure and mechanical properties.
MATERIALS CHARACTERIZATION
(2023)
Article
Chemistry, Physical
Bin Wang, Xizhao Shan, Hongli Zhao, Shuxin Bai, Bingxing Wang, Yong Tian, Yu Tang
Summary: The hot deformation behaviors and microstructural evolution of an equiatomic NbZrTiTa refractory high entropy alloy were investigated. The study found that dislocation piling-up, kink bands, and dynamic recrystallization played significant roles in influencing the alloy's properties under different temperatures and strain rates.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Nanoscience & Nanotechnology
Jin Tian, Yake Wu, Tinghui Cao, Jianbo Pang, Xu Zhang, Feng Jiang
Summary: This study investigates the phase evolution in VCoNi medium entropy alloy via tensile deformation at different temperatures and reveals its impact on mechanical behaviors. The results show that diverse phase transitions can be stimulated, and the influence of strain accumulation and Co segregation on phase transformation is discussed.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Nanoscience & Nanotechnology
Lijing Lin, Xin Xian, Zhihong Zhong, Kuijing Song, Chengyong Wang, Guoqiang Wang, Yucheng Wu, Peter K. Liaw
Summary: The dual-phase FeCoCrMn alloy with alternating lamellar FCC and sigma phases showed high compression yield strength and limited ductility. Improved thermal activation process and strength decline at elevated temperatures were responsible for the increased ductility and decreased yield strength. Comparison of yield strength with other high-entropy alloys was also made.
ADVANCED COMPOSITES AND HYBRID MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Reza Gholizadeh, Shuhei Yoshida, Yu Bai, Shu Kurokawa, Akinobu Shibata, Nobuhiro Tsuji
Summary: In this study, the deformation behavior of the CoCrFeMnNi alloy under ultra-high strains at various temperatures was investigated. It was found that deformation twinning was extensively activated at moderate to high strains and at elevated temperatures above 600 degrees C. The alloy showed excellent deformability at low temperatures, but embrittlement occurred at intermediate temperatures. This research provides insights into the microstructure evolution and mechanical response of the Cantor alloy under shear deformation at a wide range of strains and temperatures.
Article
Materials Science, Multidisciplinary
Jinna Mei, Tiandong Wu, Na Wei, Fei Xue, Zhen Cai, Xiangyi Xue
Summary: This study investigated the flow behavior of a novel high entropy alloy through isothermal compression experiments. The alloy exhibited a typical single-peak flow curve and the deformation was non-uniform due to the plastic incompatibility of its two phases. Continuous dynamic recrystallization occurred in both phases, with easier recrystallization in the BCC phase. Low temperature and high strain rate were beneficial for grain refinement.
Article
Nanoscience & Nanotechnology
Weijie Zheng, Shulin Lu, Shusen Wu, Xiaohua Chen, Wei Guo
Summary: Due to their solid solution structure, high-entropy alloys exhibit high strength and resistance to softening at both high and ambient temperatures. However, their high density and low plasticity at ambient temperature limit their widespread applications. This study investigated the microstructure and mechanical properties of MoNbVTx HEA with different Ta contents and found that certain alloys exhibited superior high temperature performance and relatively low density, making them potential materials for structural applications.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Haowei Zhai, Li Wang, Qinghang Wang, Meng Li, Yanfu Chai, Jun Xu, Bin Jiang
Summary: In this study, a new Mg-3Bi-1Ca alloy was fabricated by low-temperature extrusion, showing high mechanical properties and acceptable ductility. Microstructural analysis revealed that the enhanced yield strength was attributed to the ultra-fine grain structure, nano-scale second phases, and Ca segregation at grain boundaries. Additionally, the weak basal fiber texture ensured suitable ductility.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Yueling Guo, Junyang He, Wenjun Lu, Lina Jia, Zhiming Li
Summary: The study revealed that the TaMo0.5ZrTi1.5Al0.1Si0.2 high entropy alloy exhibited significant changes in microstructure and chemical composition after casting and annealing, leading to an increase in strength. The alloy also displayed different deformation behaviors at different temperatures.
MATERIALS CHARACTERIZATION
(2021)
Article
Chemistry, Physical
Z. C. Bai, X. F. Ding, Q. Hu, M. Yang, Z. T. Fan, X. W. Liu
Summary: The thermal deformation behaviors and microstructure evolution of a novel light refractory high-entropy alloy TiAlVNb2 were investigated, revealing the occurrence of work hardening, dynamic re-crystallization, and dynamic recovery mechanisms, as well as a high apparent activation energy. Additionally, a unique feature of both discontinuous and continuous dynamic re-crystallization processes was observed in this alloy.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Wei Jiang, Shengyun Yuan, Yang Cao, Yong Zhang, Yonghao Zhao
Summary: The Ni2Co1Fe1V0.5Mo0.2 medium-entropy alloy shows remarkable mechanical properties at 800 degrees C with secondary strain hardening during tensile deformation, where the high density of dislocation forests and solute atmospheres lead to increased strain hardening rate. The dominant deformation mechanism shifts from forest dislocation cutting to dislocation cross-slip at 800 degrees C, while dynamic-strain aging poses plastic instability and deteriorates the strain hardening of the alloy.
Article
Chemistry, Physical
Jiebo Lu, Wenjie Xin, Tengfei Ma, Xiaohong Wang, Duo Dong, Dongdong Zhu
Summary: The microstructural evolution and dynamic recrystallization behavior of a dual-phase medium entropy alloy were studied under different temperature and strain rate conditions. The initial dual-phase microstructures were characterized and the deformation activation energy was calculated. The appropriate hot deformation parameters were determined based on the hot processing map and deformation microstructure. It was also found that the continuity of dynamic recrystallization depended on the deformation temperature.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Tangqing Cao, Wenqi Guo, Wang Lu, Yunfei Xue, Wenjun Lu, Jing Su, Christian H. Liebscher, Chang Li, Gerhard Dehm
Summary: The mechanical behavior and deformation mechanisms of a body-centered cubic high entropy alloy were investigated at different temperatures and strain rates, revealing an increase in yield stress with increasing strain rate and a transition from strain softening to strain hardening at lower temperatures.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Metallurgy & Metallurgical Engineering
Bo Cheng, Yunkai Li, Xiaoxi Li, Huibin Ke, Liang Wang, Tangqing Cao, Di Wan, Benpeng Wang, Yunfei Xue
Summary: The crystal structure, microstructure and hydrogen storage performance of a series of high-entropy alloys in the Ti-V-Nb-Cr system were investigated. It was found that one alloy exhibited a high hydrogen storage capacity. The addition of Mn, Fe and Ni elements destabilized the hydrides, further improving the kinetics of hydrogen adsorption and dissociation.
ACTA METALLURGICA SINICA-ENGLISH LETTERS
(2023)
Article
Cardiac & Cardiovascular Systems
Jiehua Li, Yunfei Xue, Shangqian Li, Likun Sun, Lunchang Wang, Tun Wang, Kun Fang, Mingyao Luo, Xin Li, Hao He, Ming Li, Quanming Li, Alan Dardik, Chang Shu
Summary: TEVAR with chimney technique is a minimally invasive alternative for the treatment of aortic arch diseases, providing good chimney graft patency and low postoperative mortality during follow-up. However, caution should be exercised when using double and triple chimney techniques, as they seem to be associated with a higher risk of type IA endoleak and adverse events after the operation.
FRONTIERS IN CARDIOVASCULAR MEDICINE
(2022)
Article
Computer Science, Artificial Intelligence
Xiangzhou Zhang, Kang Liu, Borong Yuan, Hongnian Wang, Shaoyong Chen, Yunfei Xue, Weiqi Chen, Mei Liu, Yong Hu
Summary: This paper introduces a novel Hybrid Adaptive Boosting approach (HA-Boost) for transfer learning, effectively addressing the issue of model performance degradation due to the dynamic nature of clinical data. Experimental results demonstrate that HA-Boost performs significantly better in predicting clinical risks.
INTERNATIONAL JOURNAL OF INTELLIGENT SYSTEMS
(2022)
Article
Materials Science, Multidisciplinary
Xue Yin, Yankun Dou, Xinfu He, Ke Jin, Chenglong Wang, Yaguang Dong, Haoran Wang, Weihua Zhong, Yunfei Xue, Wen Yang
Summary: The impact behavior of refractory single-phase concentrated solid solution alloys, TiVTa and TiVTaNb, were studied for their potential application as structural materials in the nuclear field. The study found that TiVTaNb exhibited higher ductility and resistance to crack initiation and propagation compared to TiVTa.
Article
Nanoscience & Nanotechnology
Xutao Wang, Liang Wang, Tianxiang Li, Ke Jin, Benpeng Wang, Yunkai Li, Shihai Sun, Yunfei Xue
Summary: Strain softening upon dynamic loading is a roadblock for BCC structured HEAs, but in this study, precipitation of alpha 2 phase was applied to enhance strain hardening capability. The alpha 2 precipitates with BOR interface effectively reduce slip length and generate high density dislocations for hardening.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Xuan Liu, Hui-Bin Ke, Liang Wang, Yao-Jian Liang, Lin-Jing Wang, Ben-Peng Wang, Lu Wang, Qun-Bo Fan, Yun-Fei Xue
Summary: Multi-principal element alloys (MPEAs) have exceptional properties and the composition design of MPEAs can be challenging due to complicated interactions among principal elements (PEs), as well as the formation of precipitates. This study successfully extended the cluster-plus-glue-atom model (CGM) to MPEAs for precipitation design. A cluster index (P-C) considering both chemical affinity and atomic volume factors was proposed to assist in determining the center atom in MPEAs. Experimental results demonstrated that this approach can accurately predict precipitation formation and the compositions of precipitates in MPEAs.
Article
Nanoscience & Nanotechnology
Ziwei Liu, Zhen Tan, Haili Yao, Chao Chen, Zheng Zhou, Yunfei Xue, Wei Shao, Xingye Guo, Haihua Yao, Lijia Chen, Li Cui, Dingyong He
Summary: Different heat treatment protocols are used to improve the mechanical properties of the Al-Cr-Fe-Ni-V high-entropy alloy fabricated by laser powder bed fusion additive manufacturing. Annealing leads to precipitation strengthening, which enhances the strength but reduces the ductility of the material.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Nanoscience & Nanotechnology
Fuxin Liu, Songshen Chen, Benpeng Wang, Liang Wang, Yao Xiao, Lu Wang, Shihai Sun, Yunfei Xue
Summary: This paper describes the induction of abundant coherent B2 nanoprecipitates in Ti-Zr-Al-Nb-V LHEAs through tailoring the aging treatment, which can strengthen the alloy by around 20%. The inhibition of dislocation propagation and the delocalization of deformation are achieved, leading to considerable improvement in strength and ductility.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Metallurgy & Metallurgical Engineering
Xue Yin, Yan-Kun Dou, Xin-Fu He, Ke Jin, Cheng-Long Wang, Ya-Guang Dong, Cun-Yong Wang, Yun-Fei Xue, Wen Yang
Summary: The addition of Nb in TiVTa refractory high-entropy alloy significantly improves impact toughness and strengthens the resistance to crack initiation and propagation. TiVTaNb alloy exhibits larger bending degree of shear lips, deeper dimples, and more secondary cracks, effectively dissipating more impact energy. The deformation mechanism of TiVTaNb is synergized by dislocation activities and deformation twinning, contributing to improved impact properties and stronger crack resistance under impact loading.
ACTA METALLURGICA SINICA-ENGLISH LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Bo Cheng, Lingjie Kong, Yunkai Li, Di Wan, Yunfei Xue
Summary: In recent years, high-entropy alloys (HEAs) have gained significant attention due to their potential for hydrogen storage, fast hydrogen absorption kinetics, and composition selectivity. In this study, three V30Nb10(TixCr1-x)(60) HEAs with different Ti contents were designed and investigated for their microstructure characteristics and hydrogen storage performances. The results showed that the alloys exhibited similar hydrogen release behaviors at different temperatures, with the hydrogen desorption kinetics being controlled by diffusion. The study provides valuable information for the development of high-entropy-based hydrogen storage alloys.
Review
Materials Science, Multidisciplinary
Lingjie Kong, Bo Cheng, Di Wan, Yunfei Xue
Summary: Recently, high entropy alloys (HEAs) with body-centred cubic (BCC) single phase structures have been widely studied for hydrogen storage due to their unique structural characteristics and excellent performance. In this review, the definition and criteria of HEAs are discussed, and the current research status of BCC-structured HEAs for hydrogen storage is summarized from the perspectives of composition designs, synthesis processes, and hydrogen storage properties. Furthermore, the possible application scenarios and future research directions are analyzed.
FRONTIERS IN MATERIALS
(2023)
Article
Medical Informatics
Xiangzhou Zhang, Yunfei Xue, Xinyu Su, Shaoyong Chen, Kang Liu, Weiqi Chen, Mei Liu, Yong Hu
Summary: The study developed a predictive modeling framework based on transfer learning to correct performance drift in clinical prediction models caused by changes in the patient population. The framework effectively utilized new data while preserving old knowledge, resulting in improved model performance.
JMIR MEDICAL INFORMATICS
(2022)
Article
Geosciences, Multidisciplinary
Yan Zhang, Yun-fei Xue, Chun-yang Bu, Ti Li, Xin Zhang, Yu-dong Jin, Yue-wu Sun
Summary: This study identifies two palynological assemblages in the Tongbomiao Formation in the Hailar Basin, Inner Mongolia, China for the first time. These assemblages provide important evidence for biostratigraphic correlation and allow reconstructions of the vegetation and paleoclimate during the Early Cretaceous period.
Article
Chemistry, Physical
X. X. Wang, W. Q. Wang, W. D. Hutchison, C. W. Wang, H. Y. Hao, F. Su, Y. F. Xue, J. C. Debnath, S. J. Campbell, Z. X. Cheng, J. L. Wang
Summary: The structural and magnetic properties of LaMn2Ge2 compound were studied, revealing its potential for magnetic refrigeration applications at room temperature.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
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)
