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Mechanical properties regulation in TiNi/Zr-based metallic glass composites through elasto-static load-induced stress-activated martensitic transformation

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Journal of Alloys and Compounds 2025年 1027卷

作者： Gong, Pan Zhang, Jiaqi Ding, Huaping Li, Maojun Jin, Junsong Zhang, Mao Wang, Xinyun State Key Laboratory of Materials Processing and Die & Mould Technology School of Materials Science and Engineering Huazhong University of Science and Technology Hubei Wuhan430074 China State Key Laboratory of Advanced Design and Manufacturing Technology for Vehicle Hunan University Changsha410082 China Songshan Lake Materials Laboratory Dongguan523808 China Research Institute of Huazhong University of Science and Technology in Shenzhen Shenzhen518057 China

This investigation introduced an elasto-static loading (ESL) strategy that leveraged the rejuvenation effect of the metallic glass matrix and the transformation toughening of the crystalline phase, thereby enhancing the strength and ductility of Zr-based metallic glass composites reinforced with TiNi particles synthesized through spark plasma sintering. Composites samples with varying volume fractions of TiNi particles underwent 12 hours of static compression loading at 90 % of their yield strength, and a systematic investigation was conducted to study the microstructural and mechanical property alterations induced by ESL. The findings revealed that ESL not only imparted a rejuvenation effect on the metallic glass matrix but also triggered martensitic phase transformation strengthening in the TiNi particles. This effectively enhanced the room-temperature compressive ductility of the composites with 20 vol% and 30 vol% TiNi, with the increase exceeding 50 %, while also improving their strength. Nonetheless, an increase in the volume fraction of TiNi particles resulted in higher internal porosity and a rising number of weakly bonded interfaces within the composites, which diminished the ductility enhancement effects of ESL. With the application of elastic stress, the augmentation of free volume within the metallic glass matrix facilitated the nucleation of shear bands. Moreover, the crystalline second phase, strengthened by phase transformation, not only bolstered the strength of composite but also exerted a stronger resistance to shear bands propagation, consequently enhancing ductility. © 2025 Elsevier B.V.

关键词： Microhardness

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Co (1 1 1) loaded on amorphous Co(OH)2 − derived porous Ni with maximized Co (1 1 1) utilization for hydrogen evolution reaction

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Fuel 2025年 398卷

作者： Shi, Yuan Wang, Rongjiao Liu, Shimin Zhu, Xiaofeng Jiao, Shuqiang State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals School of Materials Science and Engineering Lanzhou University of Technology Lanzhou Gansu730050 China State Key Laboratory of Advanced Metallurgy University of Science and Technology Beijing Beijing100083 China Department of Energy and Mineral Engineering The Pennsylvania State University Philadelphia16802 United States

The development of hydrogen energy can help reduce dependence on fossil fuels and achieve low carbon emissions. Hydrogen production from electrolysis water is one of the clean technologies. The preparation of inexpensive and efficient electrodes is the key to improving the efficiency of hydrogen production from water electrolysis. The aim of this study is to design a catalyst with a structure of amorphous Co(OH)2 modified Co (1 1 1) using cobalt-containing waste, to improve the efficiency of water electrolysis for hydrogen production. During the electrode preparation process, the reduction order and reduction efficiency of Co2+ and H2O in the cobalt-containing waste leachate were controlled to regulate the growth of crystals and amorphous. According to the electrocatalytic performance test, the prepared electrode under conditions of 30 min, 0.10 M CoSO4, 12.5 mA/cm2 has excellent activity, with an overpotential of only −56 mV at a current density of −10 mA/cm2 and a Tafel slope of 78.6 mV/dec. In this work, cobalt-containing waste used as the raw material for production of electrode can not only reduce the cost, but also reduce the harm to the environment. Therefore, this study provides an environmentally friendly and economical method for the preparation of a high-performance and low-cost catalytic electrode for hydrogen evolution reaction. © 2025 Elsevier Ltd

关键词： Precious metals

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Hot Deformation Behavior and Microstructure Evolution of Electrolytic Copper

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Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal materials and Engineering 2025年第4期54卷 920-929页

作者： Zhang, Han Sang, Chen Zhang, Yan Xu, Yangtao Qiao, Jisen Xia, Tiandong School of Materials Science and Engineering Lanzhou University of Technology Lanzhou730050 China State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals Lanzhou University of Technology Lanzhou730050 China Jinchuan Group Copper Co. Ltd Jinchang737100 China

The hot deformation behavior of electrolytic copper was investigated using a Gleeble-3500 thermal simulation testing machine at temperatures ranging from 500 °C to 800 °C and strain rates ranging from 0.01 s-1 to 10 s-1, under 70% deformation conditions. The true stress-true strain curves were analyzed and a constitutive equation was established at a strain of 0.5. Based on the dynamic material model proposed by Prasad, processing maps were developed under different strain conditions. Microstructure of compressed sample was observed by electron backscatter diffraction. The results reveal that the electrolytic copper demonstrates high sensitivity to deformation temperature and strain rate during high-temperature plastic deformation. The flow stress decreases gradually with raising the temperature and reducing the strain rate. According to the established processing map, the optimal processing conditions are determined as follows: deformation temperatures of 600–650 °C and strain rates of 5–10 s-1. Discontinuous dynamic recrystallization of electrolytic copper occurs during high-temperature plastic deformation, and the grains are significantly refined at low temperature and high strain rate conditions. Copyright © 2025, Northwest Institute for Nonferrous Metal Research. Published by Science Press. All rights reserved.

关键词： Constitutive equations

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Effect of deep cryogenic treatment on microstructure properties of FeCrMnAlCuCx high-entropy alloys

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Intermetallics 2025年 183卷

作者： Ling, Yajun Feng, Li Ma, Kai Zhao, Yanchun Zhang, Xian Liu, Ruilong Fu, Xuan School of Materials Science and Engineering Lanzhou University of Technology Gansu Lanzhou730050 China State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals Gansu Lanzhou730050 China

In this experiment, FeCrMnAlCuCx (x = 0;0.075;0.125) HEAs were prepared using vacuum arc melting (VAM). The samples of as-cast high-entropy alloys (HEAs) were subjected to deep cryogenic treatment (DCT) for three durations: 24 h, 48 h, and 72 h. Subsequently, residual stress testing, microstructural characterization, and mechanical property testing were conducted on the samples after DCT. The results show that DCT has a strong effect on dislocations and mechanical properties. With the increase of low temperature treatment time, the dislocation density increases significantly. FeCrMnAlCuCx HEAs exhibit excellent mechanical properties after DCT-72 h. The hardness of FeCrMnAlCuC0.125 HEAs reached 460 HV, which was increased by 14.4 % on the as-cast basis. The wear rate is 6.96 × 10−6mm3N−1mm−1, which is 21.2 % lower than that in the as-cast state. The maximum tensile strength of FeCrMnAlCu HEAs at DCT-72 h was 1132 MPa, which was increased by 81.7 %. The residual stress generated by the DCT process can effectively promote the increase of dislocation density and the appearance of bundle-like twin structures in the alloy, and the effect of dislocation strengthening and twin strengthening is obvious. © 2025 Elsevier Ltd

关键词： Tensile strength

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Preparation of TEMPO-partially oxidized sodium alginate/SF scaffolds with degradation compatibility for skin defect repair

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Carbohydrate Polymers 2025年 357卷 123437页

作者： Zhao, Xinxin Wang, Wenyuan Cheng, Bo Li, Binbin Qiu, Tong Yan, Lesan Wang, Xinyu State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Xianhu hydrogen Valley Foshan528200 China Sanya Science and Education Innovation Park Wuhan University of Technology Sanya572000 China Biomedical Materials and Engineering Research Center of Hubei Province Wuhan University of Technology Wuhan430070 China Department of Stomatology Zhongnan Hospital of Wuhan University Wuhan430060 China

This study aimed to curtail the secondary damage caused by traditional dressings by cross-linking TEMPO-mediated oxidized sodium alginate (TOSA) with silk fibroin (SF) through the EDC system and preparing the scaffolds through freeze-drying and anhydrous ethanol immersion. The good adsorption, mechanical properties, high porosity, and good in vitro and in vivo biocompatibility of the scaffold can improve the healing efficiency of the wound. Additionally, sodium alginate was oxidized by the TEMPO system to lower its molecular weight and hence increase the degradation rate of the scaffold. Consequently, the scaffold demonstrated a rapid degradation rate (42.26 % degradation in 7 days) in the in vitro enzyme solution. The scaffold will not induce secondary damage to the wound and does not require removal. Furthermore, the oxidation degree of sodium alginate was regulated by the TEMPO system, supporting the preparation of degradation-adapted skin tissue engineering scaffolds. © 2025 Elsevier Ltd

关键词： Silk

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Improving the electrochemical performance of Prussian-Blue-analogue cathode by the co-doping of cobalt and nickel and its application in aqueous hybrid ions battery

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Electrochimica Acta 2025年 528卷

作者： Lin, Dian Hua, Ruiqing Yang, Hongwei Xu, Caiyun Yang, Sheng Chen, Jiajun Qu, Deyu Li, Xi Liu, Dan Department of Chemistry School of Chemistry Chemical Engineering and Life Science Wuhan University of Technology 122 Luoshi Road Hubei Wuhan430070 China State Key Laboratory of Advanced Technology for Material Synthesis and Processing School of Materials Science and Engineering Wuhan University of Technology 122 Luoshi Road Hubei Wuhan430070 China

Prussian blue and its analogues are promising electrode materials for the potassium ion batteries due to their large interstitial sites and three-dimensional porous framework. In this work, a series of Ni-co-doped Prussian blue analogues, Ni-Co hexacyanoferrate (NixCoyHCF), with various Ni/Co ratios are synthesized. Through the electrochemical investigation, the Prussian blue analogue with optimized ratio of Co and Ni coordinated with the CN, the NixCoyHCF materials exhibit enhanced performance as compared with that of the corresponding undoped counterparts. Specifically, the Ni1Co1HCF material delivers a high initial capacity of 101.6 mAh g-1 with a capacity retention of close to 100 % after 250 cycles, which reflects excellent cycle stability. Moreover, the Ni1Co1HCF material has excellent rate capability compared to NiHCF material. The capacity of the Ni1Co1HCF material under high current 2000 mA g-1 is >86.5 % of that under 50 mA g-1. After pairing with zeolite template carbon (ZTC) anode, the full cell provides an operational voltage of 1.60 V, a capacity of 54 mAh g-1 at 100 mA g-1, and 75.7 % capacity retention at 2000 mA g-1 along with the low self-discharge rate. © 2025

关键词： Semiconductor doping

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Polyoxometalated metal-organic framework superstructure for stable water oxidation

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Science (New York, N.Y.) 2025年第6745期388卷 430-436页

作者： Yue, Kaihang Lu, Ruihu Gao, Mingbin Song, Fei Dai, Yao Xia, Chenfeng Mei, Bingbao Dong, Hongliang Qi, Ruijuan Zhang, Daliang Zhang, Jiangwei Wang, Ziyun Huang, Fuqiang Xia, Bao Yu Yan, Ya State Key Laboratory of High Performance Ceramics and Superfine Microstructure Shanghai Institute of Ceramics Chinese Academy of Sciences Shanghai China School of Chemistry and Chemical Engineering State Key Laboratory of Materials Processing and Die & Mould Technology Key Laboratory of Material Chemistry for Energy Conversion and Storage (Ministry of Education) Hubei Key Laboratory of Material Chemistry and Service Failure Wuhan National Laboratory for Optoelectronics Huazhong University of Science and Technology (HUST) Wuhan China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Beijing China School of Chemical Sciences University of Auckland Auckland New Zealand National Engineering Laboratory for Methanol to Olefins Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian China Shanghai Advanced Research Institute Chinese Academy of Sciences Shanghai Synchrotron Radiation Facility Shanghai China Center for High Pressure Science and Technology Advanced Research Shanghai China Key Laboratory of Polar Materials and Devices (MOE) Department of Electronics East China Normal University Shanghai China Multiscale Porous Materials Center Institute of Advanced Interdisciplinary Studies and School of Chemistry and Chemical Engineering Chongqing University Chongqing China College of Energy Material and Chemistry Inner Mongolia Key Laboratory of Low Carbon Catalysis Inner Mongolia University Hohhot China State Key Lab of Metal Matrix Composites School of Materials Science and Engineering Shanghai Jiao Tong University Shanghai China Center for Next-Generation Energy Materials and School of Chemical Engineering Sungkyunkwan University (SKKU) Seobu-ro Jangan-guGyeonggi-do Suwon South Korea

Stable, nonprecious catalysts are vital for large-scale alkaline water electrolysis. Here, we report a grafted superstructure, MOF@POM, formed by self-assembling a metal-organic framework (MOF) with polyoxometalate (POM). In situ electrochemical transformation converts MOF into active metal (oxy)hydroxides to produce a catalyst with a low overpotential of 178 millivolts at 10 milliamperes per square centimeter in alkaline electrolyte. An anion exchange membrane water electrolyzer incorporating this catalyst achieves 3 amperes per square centimeter at 1.78 volts at 80°C and stable operation at 2 amperes per square centimeter for 5140 hours at room temperature. In situ electrochemical spectroscopy and theoretical studies reveal that the synergistic interactions between metal atoms create a fast electron-transfer channel from catalytic iron and cobalt sites, nickel, and tungsten in the polyoxometalate to the electrode, stabilizing the metal sites and preventing dissolution.

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Ultrafast synthesis of Nanoscale Metal Borides for Efficient Hydrogen Evolution

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Angewandte Chemie - International Edition 2025年第14期64卷 e202425257页

作者： Liu, Tingting Chen, Chen Pu, Zonghua Huang, Qiufeng Jiang, Jiadong Han, Min Chen, Wei Yu, Guangtao Sun, Yuzhi Huang, Shengyun Chen, Qingjun Al-Enizi, Abdullah M. Nafady, Ayman Mu, Xueqin Mu, Shichun Fujian Key Laboratory of Polymer Materials College of Chemistry and Materials Science Fujian Normal University Fujian Fuzhou350117 China Fujian Normal University Fujian Fuzhou350117 China Ganjiang Innovation Academy Key Laboratory of Rare Earths Chinese Academy of Sciences Ganzhou341000 China Department of Chemistry College of Science King Saud University Riyadh11451 Saudi Arabia State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China

Nanoscale metal borides, with exceptional physicochemical properties, have been attracted widespread attention. However, traditional synthesis methods of metal borides often lead to surface coking and large particle sizes. Herein, we have employed a flash Joule heating (FJH) technique to enable the ultrafast synthesis of metal boride nanomaterials. The synthesized materials encompass a wide range of diverse categories, including alkaline-earth metal borides (CaB6), transition metal borides (TiB2, VB2, CrB2, MoB, MoB2, MnB2, MnB4, FeB, CoB, NiB), noble-metal borides (RuB2, RuB1.1), and rare-earth metal borides (LaB6, CeB6). As an example, the RuB2 demonstrates highly desirable electrocatalytic performance for all-pH hydrogen evolution reaction (HER). Especially, under the acidic condition, it exhibits an overpotential as low as 15 mV at a current density of 10 mA cm−2, with a nearly 100 % faradic efficiency. Additionally, in situ Raman spectra confirm that both Ru and B sites serve as active sites for the HER. Moreover, the stability of RuB2 can be further enhanced by optimizing the microenvironments of the anolyte composition (H+, K+). More importantly, the experimental and density functional theory (DFT) calculations reveal that the co-existence of H+ and K+ localized around the RuB2 plays a crucial role in further enhancing the stability. © 2025 Wiley-VCH GmbH.

关键词： Joule heating

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Sintering, high-temperature stability, and thermal conductivity of (Zr, Nb, Hf, Ta)(C, N) high-entropy carbonitrides

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Ceramics International 2025年

作者： Bai, Yang Liang, Yuxin Bi, Juan Cui, Baoning Lu, Zhaopeng Wang, Huangxuan You, Xixi Li, Bangsheng School of Materials Science and Engineering Harbin Institute of Technology Harbin150001 China State Key Laboratory of Advanced Welding and Joining Harbin Institute of Technology Harbin150001 China National Key Laboratory for Precision Hot Processing of Metals Harbin Institute of Technology Harbin150001 China

High-entropy carbonitrides (HECNs), a new class of high-performance ceramics, hold great potential for high-temperature structural materials and thermal protection systems due to their excellent thermal stability and properties. For its better application, it is important to optimize the sintering temperature of HECNs and deeply investigate its thermal conductivity behavior. This study systematically investigates the thermodynamic stability, formation ability, and thermal properties of (ZrHfNbTa)CxN1-x through first-principles calculations and experimental validation. Thermodynamic calculations reveal that nitrogen incorporation reduces the sintering temperature required to achieve a stable high-entropy solid solution. Experimental validation by spark plasma sintering (SPS) shows that the sintering temperature can be reduced from 1950 °C to 1700 °C. Ab initio molecular dynamics (AIMD) simulations demonstrate that HECNs retain structural integrity at 1773 K. Thermal conductivity tests show an increase with temperature, but a decrease with higher nitrogen content, which is mainly caused by the increased scattering of phonons resulting from lattice distortions. The Debye-Callaway model fitting further elucidates the underlying thermal conductivity mechanisms. In summary, nitrogen incorporation enhances the thermodynamic stability and reduces thermal conductivity of HECN ceramics, providing valuable theoretical and experimental support for their application in high-temperature structural materials and thermal protection systems. © 2025 Elsevier Ltd and Techna Group S.r.l.

关键词： Carbon nitride

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Facet Engineering of Metal-Organic Frameworks for Triboelectric Nanogenerators-Based Self-Powered Water Splitting

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advanced materials 2025年第0期 e2415616页

作者： Kuang, Tairong Deng, Linbing Liu, Mingjin Ding, Yutong Guo, Wei Cai, Zhao Liu, Wenxian Huang, Zhao-Xia Lab State Key Laboratory of Advanced Separation Membrane Materials College of Materials Science and Engineering Zhejiang University of Technology Hangzhou310014 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 Department of Mechanical and Automotive Engineering South China University of Technology Guangzhou510641 China Faculty of Materials Science and Chemistry China University of Geoscience Wuhan430074 China

Metal-organic frameworks (MOFs) are highly versatile materials with tunable chemical and structural properties, making them promising for triboelectric nanogenerators (TENGs) and electrocatalysis. However, achieving precise control over MOF coordination structures to optimize facet-dependent properties remains challenging. Here, a facile and scalable dual-solvent synthesis strategy is presented to fabricate dendrite Co-2-methylimidazole MOF (ZIF-67-D), enabling tailored preferred facet and coordination environments. Using density functional theory (DFT) calculations and synchrotron-based X-ray absorption spectroscopy, it is demonstrated that ZIF-67-D, enriched with (112) facets, features a reduced Co coordination number and enhanced electron-donating ability compared to the conventionally (011) facet-dominated rhombic dodecahedron ZIF-67 (ZIF-67-R). This facet engineering boosts TENG charge density by 2.4-fold, OER current density by 9.9-fold (@1.65 V), and HER current density by 1.9-fold (@-0.3 V). The (112)/(011) facet ratio can be also tuned to precisely alter TENG output. Moreover, the optimized ZIF-67-D shows excellent stability, maintaining electrolyzer performance for 72 h and enabling TENG devices even in high humidity. Consequently, ZIF-67-D-based TENG (D-TENG) devices exhibit robust energy generation and power ZIF-67-D||ZIF-67-D electrolyzers for continuous hydrogen (H2) production. These findings introduce a new paradigm for converting mechanical energy into sustainable chemical energy, offering insights into facet engineering for high-performance energy harvesting systems. © 2025 Wiley-VCH GmbH.

关键词： Electrocatalysis

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