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Concurrent strength-ductility enhancement of as-cast Al 0.5 Mo 0.5 NbTa 0.5 TiZr refractory high entropy alloys via Cr alloying and the underlying mechanism

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Journal of Alloys and Compounds 2025年 1036卷

作者： Zijian Geng Jian Peng Wenjun Lu Zhigang Xu Qiang Shen Chuanbin Wang Lianmeng Zhang State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 PR China Department of Mechanical and Energy Engineering Southern University of Science and Technology Shenzhen 518055 PR China Chaozhou Branch of Chemistry and Chemical Engineering Guangdong Laboratory Chaozhou 521000 PR China Hubei Technology Innovation Center for Advanced Composites Wuhan University of Technology Wuhan 430070 PR China

Refractory high entropy alloys (RHEAs) possess superior mechanical properties at both room temperature and high temperature, yet their strength-ductility trade-off remains challenging. In this study, we successfully achieve a concurrent strength-ductility enhancement of the room temperature compressive strength and ductility in Al 0.5 Mo 0.5 NbTa 0.5 TiZr RHEA via Cr addition A systematic investigation of the influence of Cr content on the phase, microstructure, and mechanical properties of Al 0.5 Mo 0.5 NbTa 0.5 TiZrCr x (in molar ratio, x = 0, 0.1, 0.2, 0.5, 1, 1.25, and 1.5) was performed and the underlying strengthening mechanism was clarified. Al 0.5 Mo 0.5 NbTa 0.5 TiZrCr 0.2 maintains a disordered BCC_A2 phase and an ordered BCC_B2 matrix phase crystal structure as the reference alloy Al 0.5 Mo 0.5 NbTa 0.5 TiZr. Its compressive yield strength and fracture strain reach 1585 ± 205.38 MPa and 14.10 ± 3.18 %, respectively, 50 % and 234 % higher than the reference alloy. Increased dislocation density and the combined effect of solid solution hardening and Hall-Petch strengthening are believed to be responsible for this enhancement. Moreover, further Cr addition results in the formation of the Laves phase, besides BCC. The compressive yield strength and fracture strain of Al 0.5 Mo 0.5 NbTa 0.5 TiZrCr 1 RHEAs reach 1746 ± 102.90 MPa and 7.06 ± 0.28 %, respectively, which is 65 % and 63 % higher than the reference alloy.

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Editorial: Advances of innovative therapeutic strategies in age-related diseases

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Frontiers in Bioengineering and Biotechnology 2023年 11卷 1288352页

作者： Luo, Ling Wu, Bin Jie, Zhiwei Hu, Yiqiang Clinical Pharmacology Institute Pharmaceutical School Nanchang University Nanchang China State Key Laboratory of Materials Processing and Die & Mould Technology School of Materials Science and Engineering Huazhong University of Science and Technology Wuhan China Department of Orthopaedic Surgery Sir Run Run Shaw Hospital Zhejiang University School of Medicine Hangzhou China Department of Orthopaedics Union Hospital Tongji Medical College Huazhong University of Science and Technology Wuhan China

The unprecedented increase in life expectancy over the past few decades has led to a rise in the global elderly population. Age-related diseases have also become an increasingly significant social, economic, and medical burden all over the world (GBD 2019Ageing Collaborators, 2022). This has prompted significant efforts within the scientific and medical research communities to develop and enhance therapies aimed at treating age-related diseases (Esteves et al., 2023). The majority of age-related diseases, including atherosclerosis, Alzheimer's disease, rheumatoid arthritis, cancer, and aging itself, are closely linked to cellular senescence (Abokyi et al., 2023). Cells demonstrate significant phenotypic changes during the aging process, which are driven by alterations in metabolism, chromatin organization, and transcriptional activity. An evident characteristic of aging is the secretion of inflammatory mediators, including various cytokines, chemokines, extracellular matrix proteins, and growth factors, collectively referred to as the senescence-associated secretory phenotype (Weng et al., 2022;Spinelli et al., 2023).In order to extend healthy lifespan and mitigate the burden of age-related diseases among the elderly population, researchers are exploring ways to slow down the progression of these diseases and develop effective treatment approaches. This research topic focuses on the development of innovative therapeutic strategies in age-related diseases, which is expected to bring in new perspectives on age-related *** is the most common primary malignant bone tumor, characterized by a high degree of local invasiveness and a tendency to metastasize. (Chen et al., 2021).Meanwhile, poor survival rates persist for osteosarcoma patients, particularly in the old patients. Therefore, understanding its pathogenesis and developing new treatment methods are still the main unmet needs (Yang et al., 2021). MicroRNA (miRNA) is highly conserved and stable

关键词： age-related diseases bioinformatics miRNA lncRNA CirRNA exosomes

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(K, Na)Nbo3 Lead-Free Piezoceramics Prepared by Microwave Sintering and Solvothermal Powder synthesis

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SSRN 2022年

作者： Li, Haitao Hao, Yijin Lin, Zihan He, Xinyun Cai, Jiaqi Gong, Xintai Gu, Yongjun Zhang, Rui Hu, Hao Zhang, Boping Cheng, Haoyan School of Materials Science and Engineering Henan University of Science and Technology Luoyang471023 China Provincial and Ministerial Co-construction of Collaborative Innovation Center for Non-ferrous Metal New Materials and Advanced Processing Technology Henan University of Science and Technology Luoyang471023 China Beijing Key Laboratory of New Energy Materials and Technology School of Materials Science and Engineering University of Science and Technology Beijing Beijing100083 China Henan University of Science and Technology China

Low temperature and short processing time are benefical for fabricating (K, Na)NbO3 (KNN) lead-free piezoelectric ceramics with a drawback of easy alkali metal volatilization during the powder synthesis and sintering processes. This study revealed that microwave sintering in addition to microwave solvothermal powder synthesis can lead to short-time fabrication of KNN ceramics with high density and fine grains. It was found that KNN powder with a single perovskite structure can be synthesized successfully by microwave solvothermal method if the KOH/NaOH concentration exceeds 1 M, which can be densified by microwave sintering to a high relative density close to 97% at 1050 o C even using 2/9 shorter soak time than normal sintering at the same temperature. Importantly, the microwave-sintered KNN ceramics show better piezoelectric and ferroelectric properties than that by normal sintering. Despite nonexistence of any dopants, a high-level piezoelectric coefficient (d33) reaching 132 pC/N was obtained in the MS-processed pure KNN ceramics that also possess better ferroelectric properties with a high remnant polarization (Pr) up to 26.3 µC/cm2. The present work indicate that the microwave solvothermal method is a promising method for preparing KNN-based ceramics. © 2022, The Authors. All rights reserved.

关键词： Microwaves

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A novel low-cost and environment-friendly cathode with large channels and high structure stability for potassium-ion storage

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Science China materials 2021年第5期64卷 1047-1057页

作者： Weike Wang Bifa Ji Wenjiao Yao Xinyuan Zhang Yongping Zheng Xiaolong Zhou Pinit Kidkhunthod Haiyan He Yongbing Tang Functional Thin Films Research Center Shenzhen Institutes of Advanced TechnologyChinese Academy of SciencesShenzhen 518055China University of Chinese Academy of Sciences Beijing 100049China Nano Science and Technology Institute University of Science and Technology of ChinaSuzhou 215123China Key Laboratory of Advanced Materials Processing&Mold Ministry of EducationZhengzhou UniversityZhengzhou 450002China Tianjin Key Laboratory of Functional Crystal Materials Institute of Functional CrystalsTianjin University of TechnologyTianjin 300384China Synchrotron Light Research Institute 111 University AvenueMuang DistrictNakhon Ratchasima30000Thailand

Potassium-ion batteries (KIBs) are promising candidates for large-scale energy storage due to the abundance of potassium and its chemical similarity to ***,the performances of KIBs are still unsatisfactory for practical applications,mainly hindered by the lack of suitable cathode ***,combining the strong inductive effect of sulphate and the feasible preparation of Fe^(2+)-containing compounds in oxalate system,a compound with novel architecture,K_(4)Fe_(3)(C_(2)O_(4))_(3)(SO_(4))_(2),has been identified as a lowcost and environmentally friendly cathode for stable potassium-ion *** unique crystal structure possesses an unprecedented two-dimensional framework of triple layers,with 3.379Åinterlayer distance and large intralayer rings in the size of 4.576×6.846Å.According to first-principles simulations,such a configuration is favorable for reversible K-ion migration with a very low volume change of 6.4%.Synchrotron X-ray absorption spectra and X-ray diffraction characterizations at different charging/discharging states and electrochemical performances based on its half and full cells further verify its excellent reversibility and structural *** its performance needs to be improved via further composition tuning with multi-valent transition metals,doping,structural optimization,etc.,this study clearly presents a stable structural model for K-ion cathodes with merits of low cost and environmental friendliness.

关键词： potassium-ion cathode Fe-based polyanionic compound low cost environment friendly

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Cost-Effective, Scalable Fabrication of Self-Floating Hydrogel Foam for Simultaneous Photothermal Water Evaporation and Thermoelectric Power Generation

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SSRN 2022年

作者： Chen, Ling Ren, Jiaxin Gong, Jiang Qu, Jinping Niu, Ran Key Laboratory of Material Chemistry for Energy Conversion and Storage Ministry of Education Hubei Key Laboratory of Material Chemistry and Service Failure Hubei Engineering Research Center for Biomaterials and Medical Protective Materials Semiconductor Chemistry Center School of Chemistry and Chemical Engineering Huazhong University of Science and Technology Wuhan430074 China National Engineering Research Center of Novel Equipment for Polymer Processing Key Laboratory of Polymer Processing Engineering Ministry of Education Guangdong Provincial Key Laboratory of Technique and Equipment for Macromolecular Advanced Manufacturing School of Mechanical and Automotive Engineering South China University of Technology Guangzhou510641 China

Three-dimensional (3D) evaporator has become one of most promising solar absorber/receiver materials for interfacial solar-driven steam generation to efficient global energy and freshwater crises remediation. However, developing 3D evaporators in a green and easy scale-up manner remains a grand challenge. Herein, we pose a cost-effective, scalable, and green foaming method using water as the foaming agent to construct self-floating monolith 3D hydrogel foams for synergetic coupling of interfacial solar energy conversion-driven steam generation and low-grade heat-to-electricity conversion. Attributed to its powerful water supply capability, the as-prepared hydrogel foam evaporator with porous structure achieves efficient water evaporation without salt accumulation in the course of continuous seawater desalination. Notably, the 3D hydrogel evaporator simultaneously achieves an evaporation rate of 3.39 kg m -2 h -1 and the electric power output of 0.63 W m -2 under 1 Sun illumination, surpassing great majority of previously reported solar evaporators. In outdoor experiments, the 3D hydrogel evaporator realizes a maximum water collecting rate of 1.2 kg m -2 h -1 and an accumulated output amount of 8.9 kg m -2 during one day. More importantly, six devices connected in series can power small devices like electric fan, calculator and timer. This work provides a cost-effective and easy-to-manufacture vacuum-assisted water-foaming approach for opening up low-cost, high-performance, scalable and durable 3D hydrogel evaporators to achieve freshwater and thermoelectric power co-generation in off-grid or remote districts. © 2022, The Authors. All rights reserved.

关键词： Solar energy

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Achieving Excellent Superelasticity and Extraordinary Elastocaloric Effect in a Directionally Solidified Co-V-Ga Alloy

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SSRN 2021年

作者： Niu, Yurong Chen, Haiyang Zhang, Xiangyu Li, Shengwei Cong, Daoyong Ma, Tianyu Li, Shilei Lin, Junpin Wang, Yan-Dong Beijing Advanced Innovation Center for Materials Genome Engineering State Key Laboratory for Advanced Metals and Materials University of Science and Technology Beijing Beijing100083 China Frontier Institute of Science and Technology State Key Laboratory for Mechanical Behavior of Materials MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter Xi’an Jiaotong University Xi’an710049 China

We demonstrate excellent superelasticity and giant elastocaloric effect in a directionally solidified Co50.7V33.3Ga16 alloy. Owing to the formation of [001]A preferentially oriented columnar grains, the as-grown alloy displays nearly perfect superelastic behaviors with fully reversible compressive strain of up to 5.4%, narrow stress hysteresis of about 40 MPa and a wide operating temperature window from 258 to 373 K. Simultaneously, a giant adiabatic temperature change ΔTad of -18.7 K is obtained on removing a uniaxial stress of 400 MPa at room temperature, which is in good agreement with the theoretical values based on Maxwell relation (-19.0 K) and calorimetric measurements (-19.9 K). A large |ΔTad| of greater than 12.5 K is obtained over a wide temperature span of at least 115 K. Moreover, both superelasticity and elastocaloric effect remain good functional stability without any evident degradation for 100 cycles. © 2021, The Authors. All rights reserved.

关键词： Elasticity

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Applications of perovskite oxides for oxygen evolution and oxygen reduction reactions in alkaline media

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Energy Reviews 2025年第2期4卷

作者： Wang, Huimin Cheng, Junfang Chen, Hao Li, Xinyi Liu, Dawei Li, Xinyu Li, Wenjun Wei, Guanghua Shen, Shuiyun Chi, Bo Zhang, Junliang SJTU Paris Elite Institute of Technology Shanghai Jiao Tong University Shanghai200240 China China Nuclear Power Operation Technology Corporation LTD WuHan430223 China State Key Laboratory of Material Processing and Die & Mould Technology School of Materials Science and Engineering Huazhong University of Science and Technology Wuhan430074 China Institute of Fuel Cells School of Mechanical Engineering Shanghai Jiao Tong University Shanghai200240 China Australian Institute for Machine Learning The University of Adelaide AdelaideSA Australia Research Center for Materials Science/Graduate School of Science Nagoya University Furo Chikusa ward Aichi Nagoya464-8602 Japan

It is urgent to develop novel energy storage and conversion systems to address the pressing issues of the energy crisis and environmental pollution, including alkaline water electrolysis, alkaline fuel cells and metal-air batteries. However, these systems are hampered by the sluggish kinetics of the oxygen evolution reaction (OER) or oxygen reduction reaction (ORR). One of the most effective strategies to overcome this challenge is the development of efficient and stable catalysts for both ORR and OER, which typically consist of Pt, Ir, or other precious metals. Unfortunately, most precious metal catalysts are limited to single catalytic activity (either ORR or OER) and are constrained by the high cost and scarcity of noble metals. Perovskite oxides offer significant promise as efficient bifunctional ORR/OER catalysts due to their high catalytic activity, versatile composition, low cost, and high stability in alkaline environments. The general preparation methods of perovskite-type oxides are summarized in this work. Then recent mechanistic studies on the ORR and OER of perovskite oxides are also discussed, particularly highlighting the theoretical and experimental methods employed to facilitate these studies. Further strategies for improving the catalytic performance of perovskite oxides are discussed from five perspectives. The perspective of challenges and future directions for the development of perovskite oxides in ORR and OER applications are finally presented. © 2025 The Authors

关键词： Perovskite

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High-Performance Polyimide Aerogel Film-Based Triboelectric Nanogenerator for Micro-Liquid Sensing

SSRN

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SSRN 2022年

作者： Zhou, Qili Zhao, Ruolan He, Yu Li, Zhangcheng Tao, Guangming Hu, Bin Hou, Chong School of Optical and Electronic Information Huazhong University of Science and Technology Hubei Wuhan430074 China Sport and Health Initiative Optical Valley Laboratory Wuhan National Laboratory for Optoelectronics Wuhan China State Key Laboratory of Material Processing and Die & Mould Technology School of Materials Science and Engineering Huazhong University of Science and Technology Wuhan430074 China

Aerogels exhibit excellent sensing performance thanks to their high porosity, large specific surface area and remarkable mechanical property. However, the prevalent aerogel-based sensors fail to detect liquid in a way of low detection limit, fast response, and good robustness. Here, we have fabricated a polyimide aerogel (PIA) film with porosity up to 98.01 % and thickness about 220 μm, and build a liquid sensor with this PIA film as a tribo-negative layer. The liquid sensor can respond to different liquid droplets on the basis of liquid-solid interaction and the triboelectric effect. Benefitting from the mesoporous structure, high porosity, low thickness and stable compression performance of the PIA film, the liquid sensor shows fast response and good robustness for detecting different liquids down to 7 μl. The mechanisms of the sensor for distinguishing liquids are discussed from the aspects of effective relative permittivity, the interaction between liquid and PIA film, and transfer charge quantity. The micro-liquid sensors basing on high-performance PIA films provide supports for the development of environmental protection and biochemical sensing, and show huge application potential in sensing related areas. © 2022, The Authors. All rights reserved.

关键词： Nanogenerators

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Resolving Nanograin Morphology and Sub-Grain Nanodomains Via Scanning Probe Acoustic Microscopy in Batio3 Ferroelectric Films for Energy Storage Applications

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SSRN 2023年

作者： Ouyang, Jun Xue, Yinxiu Yuan, Meiling Song, Chuanqi Wang, Kun Zhao, Yuyao Cheng, Hongbo Zhu, Hanfei Liu, Chao Institute of Advanced Energy Materials and Chemistry Jinan Engineering Laboratory for Multi-Scale Functional Materials School of Chemistry and Chemical Engineering Qilu University of Technology Shandong Academy of Sciences Shandong Jinan250353 China Key Laboratory of Key Film Materials & Application for Equipment School of Material Sciences and Engineering Xiangtan University Hunan Xiangtan411105 China Key Laboratory for Liquid-Solid Structure Evolution and Processing of Materials Ministry of Education School of Materials Science and Engineering Shandong University Shandong Jinan250061 China Academic Affairs Office Civil Aviation University of China Tianjin300300 China China Tobacco Shandong Industrial Co. Ltd. Shandong Jinan250014 China

Energy storage property of a dielectric is closely tied with its nanostructure. In this study, we aimed to achieve a deep understanding of this relationship in high energy density ferroelectric ceramic films, by probing into the nanograin and sub-grain nanostructures in polycrystalline BaTiO3 films integrated on Si. Through scanning probe acoustic microscopy analyses, it was revealed that the BaTiO3 films directly grown on Pt/Ti/Si consist of large discontinuous columnar nanograins, while those grown on LaNiO3-buffered Pt/Ti/Si substrates display a continuous columnar nanograin microstructure. Furthermore, ultrafine ferroelastic domains of ~ 10 nm wide were revealed inside the grains of the buffered BaTiO3 films, while those unbuffered films showed about ~50% increase in the domain width. The dielectric properties of the BaTiO3 films, including the energy storage performance, are well correlated with their characteristic nanostructures. © 2023, The Authors. All rights reserved.

关键词： Ferroelectric films

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Influence of Hydrogen Ingress and Capture on the Mechanical Properties of Spray Formed 2195 Aluminum Alloy

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SSRN 2024年

作者： Yang, Xiao-Xu Jiang, Yun-Ze Li, Guo-Ai Shen, Xiao-Yu Lai, Xiao-Ming Wang, Xiao-Ya Jiang, Jian-Tang Zhen, Liang School of Materials Science and Engineering Harbin Institute of Technology Harbin150001 China Jiangsu Haoran Spray Forming Alloy Co. Ltd. Zhenjiang212000 China Beijing Institute of Aeronautical Materials Beijing100095 China Beijing Engineering Research Center of Advanced Aluminum Alloys and Application Beijing100095 China Beijing Spacecrafts Co. Ltd. Beijing100094 China Shenzhen518055 China National Key Laboratory of Precision Hot Processing of Metals Harbin Institute of Technology Harbin150001 China

The current research has focused on the hydrogen capturing and its impact on the mechanical properties of spray-formed 2195 (SF2195) aluminum alloy. Microstructure characterization, thermal desorption spectra (TDS) and hydrogen trapping of characteristic microstructure, are used to investigate the generation, migration and trapping of hydrogen. The retention of moisture in the carrier gas is believed to induce high concentration of hydrogen and the amorphous Al2O3 layer within the SF2195 billet, and the local retention of carrier gas brings about pores with the Al2O3 layer on the inner wall. High concentration of hydrogen is captured in the hot-rolled alloy while around 60% of the hydrogen can be eliminated during the solution-quenching. Particles of T1 phase trap large quantity of hydrogen and the high-density dislocations developed from the pre-stretch promote the migration of hydrogen towards dispersoids and precipitates. The presence of hydrogen and Al2O3 layers contribute to the reduced plasticity of SF2195 alloy. The spreading of flattened pores can induce intensified hydrogen damage effect in local regions and thus contribute to the unusually decreased ductility along the thickness direction in the T8 aged alloy. © 2024, The Authors. All rights reserved.

关键词： Hydrogen

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