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Scalable graphene foam with ultrahigh conductivity for stabilizing Pt towards efficient hydrogen evolution

Nano Research 2024年第8期17卷 6968-6976页

作者： Ming Zhao Meng Huang Huihui Jin Dayin He Wei Qian Zixin Zhang Daping He State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Hubei Engineering Research Center of RF-Microwave Technology and Application Wuhan University of TechnologyWuhan 430070China School of Information Engineering Wuhan University of TechnologyWuhan 430070China School of Chemistry and Materials Science University of Science and Technology of ChinaHefei 230026China Sanya Science and Education Innovation Park of Wuhan University of Technology Sanya 572000China

For the carbon-based catalyst to be active and stable,especially in harsh electrochemical environments,the key is to decrease the concentration of defects and raise the degree of graphitization of the carbon ***,we develop a highly graphitized graphene foam with multiplicated structure to fabricate self-supporting Pt-based catalysts for efficient and stable hydrogen evolution reaction(HER)*** foam(GO-2850)is obtained through an ultra-high temperature treatment at 2850℃,with perfect graphene structure and extremely low defect,ensuring high electrical conductivity and corrosion ***,its multiplicated structure provides an inherently favorable environment for the dispersion of Pt nanoparticles(Pt NPs)and offers abundant channels for electrolyte infiltration during the catalytic *** a result,the as-prepared Pt/GO-2850 is far active and stable than the Pt NPs supported on commercial carbon paper(Pt/CP)counterpart toward catalyzing HER,exhibiting an outstanding activity and long-term durability(300 h@10 mA·cm^(−2))in acidic/alkaline/seawater *** can be attributed to the stronger interaction between the lower-defect GO-2850 substrate and Pt,as evidenced by characterization and theoretical *** work extends further insight into the design self-supporting catalysts of high activity and stability with promising prominent application toward green energy devices.

关键词： graphene foam high graphitization Pt nanoparticles hydrogen evolution reaction long-term stability

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Research on Strain Partitioning and Mechanical Properties of a Cast Multiphase Stainless Steel 75

Research on Strain Partitioning and Mechanical Properties of...

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75th World Foundry Congress, WFC 2024

作者： Wu, Zixiang Chen, Xiang School of Materials Science and Engineering Tsinghua University Beijing100084 China Key Laboratory for Advanced Materials Processing Technology Ministry of Education Beijing100084 China

Multiphase stainless steels can offer very attractive combinations of high strength, high toughness and good corrosion resistance due to the characteristics of multiphase, metastable, and multi-scale. In this study, the strain partitioning in ferrite of a cast multiphase stainless steel was investigated by EBSD. The deformation occurs first in the softer ferrite and later transfers to the martensite/austenite regions. As the strain increases, subgrains form within the ferrite, effectively accommodating the deformation of different phases. © 2024 75th World Foundry Congress, WFC 2024. All rights reserved.

关键词： Corrosion resistance

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Thermodynamic and experimental evaluation of the sustainable recycling of magnesium alloy scrap by vacuum distillation based on vapor-liquid equilibrium

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Journal of Magnesium and Alloys 2025年第1期13卷 283-295页

作者： Lipeng Wang Dong Liang Yang Tian Jianxue Chai Rui Li Shuji Wu Bin Yang Baoqiang Xu Yong Deng Key Laboratory for Nonferrous Vacuum Metallurgy of Yunnan Province Kunming University of Science and TechnologyKunmingChina State Key Laboratory of Complex Non-ferrous Metal Resources Clean Utilization Kunming University of Science and TechnologyKunmingChina Engineering Research Center of Aluminum Industry of Yunnan Province Kunming University of Science and TechnologyKunmingChina National Engineering Research Center of Vacuum Metallurgy Kunming University of Science and TechnologyKunmingChina Faculty of Metallurgical and Energy Engineering Kunming University of Science and TechnologyKunmingChina Shanxi Regal Advanced Material Co. Ltd.Yuncheng CityChina

Magnesium(Mg)alloys are widely used lightweight structural materials for automobiles and help reduce carbon ***,their use increases the production of Mg alloy scrap,which is recycled at a much lower rate than aluminum,and its greater complexity poses challenges to existing recycling *** vacuum distillation can be used to recycle Mg alloy scrap,this requires optimizing and maximizing metal recirculation,but there has been no thermodynamic analysis of this *** this study,the feasibility and controllability of separating inclusions and 23 metal impurities were evaluated,and their distribution and removal limits were *** analyses and experimental results showed that inclusions and impurity metals of separation coefficient lgβ_(i)≤-5,including Cu,Fe,Co,and Ni below 0.001 ppm,could be removed from the *** Zn entered the recycled Mg,while impurities with-1

关键词： Magnesium alloy Scrap recycling Thermodynamic analysis Impurity removal Vacuum distillation

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pH modulation and molecular layer construction for stable zinc batteries

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Journal of Energy Chemistry 2025年第3期102卷 179-188页

作者： Donghong Wang Qiwang Shao Xianjia Cao Mengxuan Qin Yizhu He Lei Zhu Qing Li Dongming Liu School of Materials Science and Engineering Anhui Province Key Laboratory of Efficient Conversion and Solid-State Storage of Hydrogen&ElectricityAnhui University of TechnologyMa'anshan 243032AnhuiChina Anhui Key Lab of Metal Material and Processing Ma'anshan 243002AnhuiChina School of Chemistry and Chemical Engineering Anhui University of TechnologyMa'anshan 243032AnhuiChina Institute of Applied Physics and Materials Engineering University of MacaoMacao 99078China

Aqueous zinc-ion batteries(AZIBs)have regained interest due to their inherent safety and ***,the zinc anode is notorious for side reactions and dendrite growth,which plague the practical application of *** the interfacial pH to reduce the by-products has been proven to be effective in protecting the zinc ***,the dynamic regulation of the inherently unstable zinc interface during prolonged cycling remains a significant ***,zwitterionic N-tris(hydroxymethyl)methylglycine(TMG)integrated with negative-COO^(-)and positive NH_(2)^(+)groups is proposed to stabilize the Zn anode and extend the lifespan as a self-regulating interfacial *** anionic portion serves as a trapping site to balance the interfacial pH and thus mitigate the unintended side ***,the NH_(2)^(+)cations are anchored on the zinc surface,forming a water-shielding,zincophilic molecular layer that guides three-dimensional diffusion and promotes uniform ***,an average plating efficiency of 99.74%over 3300 cycles at a current density of2 mA cm^(-2)is ***,the TMG additive actualizes ultralong life in Zn‖Zn symmetrical cells(5500 h,exceeding 229 days,1 mA cm^(-2)/1 mA h cm^(-2)),and enables the Zn‖I_(2)cells to reach capacity retention rate of 89.4%after 1000 cycles at 1 A g^(-1).

关键词： Aqueous zinc ion battery Zn dendrites pHDynamic regulation Molecular layer Zn-12

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Sound absorption model of thin woven fabric with tortuosity effects by equivalent circuit method 2

Sound absorption model of thin woven fabric with tortuosity ...

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2023 2nd International Conference on Acoustics, Fluid Mechanics and Engineering, AFME 2023

作者： Tang, Xiaoning Zhu, Shubing State Key Laboratory for New Textile Materials and Advanced Processing Technology School of Textile Science and Engineering Wuhan Textile University Hubei Wuhan430200 China

The fabric has been widely used as a noise-reduction material. This paper presents a revised equivalent circuit model to simulate the acoustical behavior of woven fabric with backing an air gap, with a special focus on including a tortuosity parameter. The simulated sound absorption of three fabrics with and without the tortuosity parameter was experimentally validated. The equivalent circuit model including the tortuosity parameter predicts the absorption curve better, particularly at the local minima in comparison to the existing models without the tortuosity effects. It is beneficial to the structural design of woven fabric with enhanced sound absorption. © Published under licence by IOP Publishing Ltd.

关键词： Acoustic wave absorption

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Liquid crystal elastomer composites for soft actuators

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International Journal of Smart and Nano materials 2023年第4期14卷 440-459页

作者： Jianbo Sun Chao Wang Yongjiao Liu Xudong Liang Zhijan Wang Aerospace Research Institute of Materials&Processing Technology FengtaiBeijingChina School of Science Harbin Institute of TechnologyShenzhenChina Key Laboratory of Aerospace Advanced Materials and Performance Ministry of EducationSchool of Materials Science and EngineeringBeihang UniversityBeijingChina Tianmushan Laboratory HangzhouChina

Liquid crystal elastomers are active materials that combine the anisotropic properties of liquid crystals with the elasticity of polymer *** LCEs exhibit remarkable reversible contraction and elongation capabilities in response to external stimuli,rendering them highly promising for diverse applications,such as soft robotics,haptic devices,shape morphing structures,etc,However,the predominant reliance on heating as the driving stimulus for LCEs has limited their practical *** drawback can be effectively addressed by incorporating fllers,which can generate heat under various *** recent progress in LCE composites has significantly expanded the application potential of *** this minireview,we present the design strategies for soft actuators with LCE composites,followed by a detailed exploration of photothermal and electrothermal *** as prominent ***,we provide an outlook on the challenges and opportunities in the feld of LCE composites.

关键词： Liquid crystal elastomers soft actuators soft robots active composites

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Deformation mechanisms in aβ-quenched Ti-5321 alloy:In-situ investigation related to slip activity,orientation evolution and stress induced martensite

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Journal of materials Science & technology 2022年第17期112卷 36-48页

作者： Cong Wu Qinyang Zhao Shixing Huang Yongqing Zhao Lei Lei Junqiang Ren Qiaoyan Sun Lian Zhou State Key Laboratory for Mechanical Behavior of Materials Xi'an Jiaotong UniversityXi’an 710049China School of Material Science and Engineering Chang'an UniversityXi’an 710064China Northwest Institute for Non-ferrous Metal Research Xi’an 710016China State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals Lanzhou University of TechnologyLanzhou 730050China

The deformation behavior ofβ-quenched nearβTi-5321(Ti-5Al-3Mo-3V-2Cr-2Zr-1Nb-1Fe)alloy was systematically studied using in-situ tensile test monitored by the scanning electron microscopy(SEM).Besides,the electron backscatter diffraction(EBSD)was performed to thoroughly discuss the deformation *** results indicated that slip activities,crystal rotation and stress induced martensite transformation were the major deformation mechanisms in theβ-quenched Ti-5321 alloy during in-situ tensile *** slip activities were investigated by using the EBSD-trace analysis,which demonstrated that{110}<111>,{112}<111>and{123}<111>slip systems were activated and the{110}<111>slip system ***,βgrains rotated about 7.8°to accommodate the increased ***,the stress induced martensiteα″which was related to the double yielding behavior during tensile process exhibited multiple *** differentα″variants divided theβmatrix into smallerβblocks with a typical zigzag morphology,in which oneα″variant passed through another one by deflecting its initial growth ***,the deformation twinning in martensiteα″and slip bands cutting through martensiteα″effectively accommodated the local *** systematically analysis can provide insightful information about the deformation mechanisms in nearβtitanium alloys.

关键词： In-situ tensile test Slip activity Stress induced martensite Titanium alloys

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ZrO2-CPS/ZrO2 graded composite ceramics with high osteoinductivity for dental implants fabricated by stereolithography

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Ceramics International 2025年第16期51卷 21900-21912页

作者： Wu, Jiaxin Li, Zhi Meng, Xingliang Cheng, Bo Yang, Jing Li, Binbin 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 Hainan Institute Wuhan University of Technology Sanya572000 China Biomedical Materials and Engineering Research Center of Hubei Province Wuhan University of Technology Wuhan430070 China School of Foreign Languages Wuhan University of Technology Wuhan430070 China Department of Stomatology Zhongnan Hospital of Wuhan University Wuhan430060 China

Promoting mechanical strength and osteoinductivity properties is crucial for dental implants materials. Herein, we synthesized silicocarnotite (CPS) powder via a hydrothermal method, and mixed it with zirconia to create a composite material for preparing four slurries: xCPS-(1−x)ZrO2 (x = 0, 1/6, 1/3, and 1/2 vol%). The optimal printing parameters for each slurry were investigated. Following the printing of the slurries, debinding was performed on them in the temperature range of 25 °C–600 °C in nitrogen atmosphere and 600 °C–1000 °C in air atmosphere, respectively, followed by sintering at 1350 °C for 2 h. The graded zirconia-based composite ceramics prepared using stereolithography (SLA) exhibited excellent mechanical properties, including a flexural strength of 742.37 ± 22.52 MPa, Vickers hardness of 7.29 ± 0.15 GPa, fracture toughness of 5.34 ± 0.29 MPa m1/2, and a relative density of 96.3 %. Compared with zirconia ceramics, the graded composite ceramics displayed higher surface roughness. The graded composite ceramics degraded and released Ca, Si, and P ions, promoting MC3T3-E1 cells proliferation, adhesion, and osteogenic differentiation. These findings suggest that ZrO2-CPS/ZrO2 graded composite ceramics synthesized via SLA holds great potential as dental implants with high osteoinductivity. © 2025

关键词： Fracture toughness

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Distribution behavior of inclusions in compact-strip-produced martensitic steel and its influence on mechanical properties

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Journal of materials Science & technology 2023年第11期142卷 98-111页

作者： Jing Wang Peng Xue Laiqi Zhang Li You Xiaodong Zhu Shuize Wang Yong Zhong Xinping Mao State Key Laboratory for Advanced Metals and Materials University of Science and Technology BeijingBeijing 100083China Shanghai Key Laboratory of Materials Laser Processing and Modification School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240China Research Institute Baoshan Iron&Steel Co.LtdShanghai 201999China Beijing Advanced Innovation Center for Materials Genome Engineering University of Science and Technology BeijingBeijing 100083China

The distribution behavior of inclusions in martensitic steel produced by compact strip production process(CSP-MS)and its influence on mechanical properties were systematically *** inclusions in the CSP-MS specimen are mainly composed of spherical Al_(2)O_(3)-CaO-CaS,MnS with high aspect ratio and small-sized TiN,whereas many coarse cuboidal TiN inclusions do exist in conventional martensitic steel(Con-MS).The high inclusion density of the CSP-MS specimen resulted in lower total elongation and impact toughness,and the MnS inclusions with high aspect ratio led to significantly stronger mechanical anisotropy than that for Con-MS *** in-situ tensile results indicated that when the fracture direction is parallel to MnS direction,the microcracks induced by MnS inclusions tend to propagate into the matrix,leading to the formation of valley-like features,which significantly deteriorate the properties such as the total elongation and impact *** microcracks caused by TiN inclusions are sharper than those caused by spherical Al_(2)O_(3)-CaO-CaS inclusions,and are easy to propagate into the *** work is expected to guide the optimization of the mechanical properties of martensitic steels produced by CSP process and provide a theoretical basis for the CSP process design.

关键词： Martensitic steel Compact strip production Inclusion distribution behavior Mechanical properties In-situ tensile test

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Microstructure,mechanical properties and multiphase synergistic strengthening mechanisms of a novel laser additive manufactured AlNi6TiZr alloy

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Journal of materials Science & technology 2024年第11期178卷 59-69页

作者： Jiang Bi Liukun Wu Zeqi Liu Haixiang Wang Shide Li Ji Wang Zhuoyun Yang Nannan Lu Xi Chen Mikhail Dmitrievich Starostenkov Guojiang Dong Key Laboratory of Advanced Forging&Stamping Technology and Science of Ministry of Education Yanshan UniversityQinhuangdao 066004China CITIC Dicastal Co. Ltd.Qinhuangdao 066004China Institute of Metal Research Chinese Academy of SciencesShenyang 110016China National Key Laboratory for Precision Hot Processing of Metals Harbin Institute of TechnologyHarbin 150001China General Physics Department Altai State Technical UniversityLeninist.46Barnaul 656099Russia

In this work,selective laser melting(SLM)process is used to prepare the AlNi6TiZr *** analyzing the printing quality and mechanical properties of the printed specimens with different process parameters,the SLM forming window of AlNi6TiZr is *** relative density of the sample printed with 270 W-1100 mm/s(laser energy density:82 J/mm3)reaches 99.7%,exhibiting excellent mechanical properties(yield strength(YS):421.7 MPa;ultimate tensile strength(UTS):480.4 MPa).After an aging treatment of 325 ℃-12 h,the YS and UTS of the sample increased to 494 MPa and 550.7 MPa,*** Ni,Ti,and Zr components promoted the generation of multi-phase precipitates in the Al alloy and improved the synergistic strengthening effect of *** hard-shell structure(HSS)formed by the Al_(3)Ni phase at the grain boundary significantly strengthened the grain boundary *** precipitated Al_(3)(Ti,Zr)phases at the grain boundaries prevent grain growth and dislocation *** Al_(3)Ni and Al_(3)(Ti,Zr)phases have good thermal stability that can still maintain excellent enhancement effects at high ***6TiZr alloy has great application prospects in medium and high-temperature environments.

关键词： Selective laser melting Al6NiTiZr alloy Microstructure Mechanical properties Thermal stability Strengthening mechanism

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