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Heterostructured Nitrogen and Sulfur co-Doped Black TiO2/g-C3N4 Photocatalyst with Enhanced Photocatalytic Activity

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Chemical Research in Chinese Universities 2020年第6期36卷 1045-1052页

作者： MENG Zeshuol ZHOU Bo XU Jian LI Yaxin HU Xiaoying TIAN Hongwei key laboratory of Automobile materials of Ministry of Education School of Materials Science and EngineeringJilin UniversityChangchun 130012P.R.China laboratory of materials Design and Quantum Simulation College of ScienceChangchun UniversityChangchun 130022P.R.China state key laboratory of metal material for marine equipment and application Anshan Iron and Steel Group CorporationAnshan 114009P.R.China

Conventional titanium dioxide(TiO2)photocatalyst could absorb only ultraviolet light due to its wide *** this paper,black TiO2 with narrow bandgap was prepared by introducing oxygen ***(N)and sulfur(S)elements were doped to further broaden the visible light response range of TiOx(NS-BT),and then heterostructured N.S-doped black TiOz/g-C3Na(CN/NS-BT)was successfully constructed by easily accessible *** formation of CN/NS-BT heteroiunction structure increased the generation and separation efficiency of photogenerated electron-hole pairs,as well as accelerated the transfer rate of the *** as-prepared CN/NS-BT exhibited excellent photocatalytic performance towards the degradation of Rhodamine B(RhB)under visible light irradiation with satisfactory *** apparent reaction rate constant of CN/NS-BT(0.0079)was 15.8-fold higher than that of commercial P25(0.0005),The structure,morphology,chemical composition and optical properties of the as-prepared CN/NS-BT were characterized by various analytical methods,and possible photocatalytic enhancement mechanism was ***,CN/NS-BT composites look promising as photocatalytic material for future environmental treatment.

关键词： Black TiO2 g-C3N4 N,S doping Heterostructure photocatalyst Visible light photodegradation

Distinct beneficial effect of Sn on the corrosion resistance of Cr-Mo low alloy steel

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Journal of materials Science & Technology 2021年第22期81卷 175-189页

作者： Meihui Sun Xiaojia Yang Cuiwei Du Zhiyong Liu Yong Li Yumin Wu Hongyu San Xiandong Su Xiaogang Li Beijing Advanced Innovation Center for materials Genome Engineering University of Science and Technology BeijingBeijing100083China National materials Corrosion and Protection Scientific Data Center Institute of Advanced Materials and TechnologyBeijing100083China state key laboratory of metal material for marine equipment and application Anshan114009China College of materials Science and Engineering Chongqing UniversityChongqing 400045China

In this work,the beneficial effect of Sn addition on the corrosion resistance mechanism of Cr-Mo low alloy steel was *** demonstrated that Sn improves the corrosion resistance of the steel matrix mainly by influencing the microstructural *** addition and the synergistic effect of Sn,Cr,and Mo promote the formation of α-FeOOH,SnO_(2),SnO,Cr(OH)_(3),and molybdates,lead to the improved protection and stability of the rust *** synergistic effect also endows the inner rust layer with cation selectivity,preventing the further penetration of Cl-and inhibiting the localized corrosion of steel.

关键词： Sn addition Low alloy steel SKPFM TEM Corrosion resistance

Molecular Dynamics Simulation on Mobility and Aggregation of Macromolecular Lubricant Oxidation Products and Their Influences on Base Stock

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China Petroleum Processing & Petrochemical Technology 2020年第3期22卷 101-108页

作者： Xia Lei Li Yan Zhang Hongmei Jiang Zhengyi Long Jun School of material and metallurgy University of Science and Technology LiaoningAnshan 114051 state key laboratory of metal material for marine equipment and application Anshan 114009 Iron&Steel Research Institutes of Ansteel Group Corporation Anshan 114009 School of Mechanical MaterialsMechatronic and Biomedical EngineeringUniversity of WollongongWollongongNSW 2522Australia SINOPEC Research Institute of Petroleum Processing Beijing 100083

The mobility and aggregation behavior of macromolecular lubricant oxidation products and their influences on the performance of base stock were probed by molecular dynamics(MD)*** mean square displacement(MSD)of molecules was calculated to explore the mobility of *** distribution appearance of lubricant oxidation products in models was acquired to explore the aggregation of *** results show that the mobility of macromolecular oxidation products is lower than that of base *** MSD of macromolecular oxidation products reduces with an increasing macromolecular *** oxidation products can also decrease the mobility of base *** interaction energy between the macromolecules and the base stock soars with the increase of macromolecular *** with a larger molecular weight can affect more base stock molecules with stronger restriction,which leads to lower mobility of base stock *** are aggregates formed among macromolecular oxidation products,and the molecules in aggregates are connected by hydrogen *** quantity of hydrogen bonds in aggregates is related to temperature.

关键词： molecular dynamics simulation lubricant oxidation aggregation mobility

Microstructure evolution of ultra-high-strength twinning-induced plasticity(TWIP)steel under dynamic loading

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Journal of Iron and Steel Research(International) 2021年第1期28卷 66-75页

作者： Qi‑hang Pang Mei Xu Zhen‑li Mi Juan Cui Jing Guo School of materials and metallurgy University of Science and Technology LiaoningAnshan 114051LiaoningChina state key laboratory of metal material for marine equipment and application Anshan 114009LiaoningChina state key laboratory of Advanced Stainless Steel materials Taiyuan Iron and Steel Group Co.Ltd.Taiyuan 030003ShanxiChina Institute of Engineering Technology University of Science and Technology BeijingBeijing 100083China Beijing Jianlong Heavy Industry Group Co. Ltd.Beijing 100070China

To prepare ultra-high-yield strength twinning-induced plasticity(TWIP)steel and reveal its work hardening mechanism at different strain rates from the microcosmic range,the microstructure evolution mechanism of Fe–20Mn–0.6C TWIP steel was investigated at strain rates of 10^(-4)–10^(3)s^(-1)using a high-speed tensile testing machine and a transmission electron *** results show that the strain rate and deformation had a significant effect on the twin morphology of TWIP *** a strain rate of 10^(2)s^(-1),secondary deformation twins were developed,which intersected with the initial deformation twins and increased the resistance of dislocation movement,as well as the *** steel at a strain rate of 10^(2)s^(-1)had a higher twin formation speed than that at 10^(0)s^(-1).At the same amount of deformation,the twin boundary fraction was higher and increased linearly at a strain rate of 10^(2)s^(-1),while the rule of twin growth at 10^(0)s^(-1)was conformed to S-curve change of DoseResp model.

关键词： Twinning-induced plasticity steel Electron backscattered diffraction,Microstructure Dynamic loading Strain rate Work hardening

Knowledge mapping analysis of the track and hotspot of water lubrication:A scientometrics review

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Friction 2023年第9期11卷 1557-1591页

作者： Runzhou XU Defa WU Zhenyao WANG Yipan DENG Qian CHENG Hao PANG Wenshu WEI Yinshui LIU state key laboratory of Digital Manufacturing equipment and Technology School of Mechanical Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China Beijing Tianma Intelligent Control Technology Co. Ltd.Beijing 101300China

With the enhancement of environmental protection awareness of the international community and the continuous promotion of green and sustainable development of manufacturing industry,water lubrication instead of mineral oil has become the future development trend due to its green,pollution-free,clean,safe,and sustainable advantages especially in ships,marine,coal mining,and other *** recent years,with the rapid development of water lubrication research,significant progress has been made in related research knowledge domain and discipline.A systematic and extensive assessment of water lubrication research has become increasingly *** objective of this research is to reveal the research status,research hotspots,and development trends in the field of water ***,CiteSpace was used to conduct a systematic bibliometric and scientometrical analysis of 1,792 publications from Web of Science core collection database(1997–2021).The results show that China and USA are the most productive countries in the field of water lubrication and have made outstanding *** the analysis of hot key words and co-citation references,this paper reviews the research status of water lubrication in three aspects:(1)lubricating medium modification;(2)material preparation;(3)surface *** has become a research hotspot to promote the superlubricity contact interface and the application of *** results of this study can make a significant contribution to the development of water lubrication by providing a comprehensive understanding of the research status and research hotspots in this *** understanding and discussion of research hotspots and research status are expected to provide insights into future research *** addition,this study will provide valuable references and guidelines for researchers who are interested in this field.

关键词： water lubrication friction scientometrics CiteSpace

Temperature-mediated tribological characteristics of 40CrNiMoA steel and Inconel 718 alloy during sliding against Si_(3)N_(4) counterparts

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Friction 2021年第5期9卷 1175-1197页

作者： Liuyang BAI Shanhong WAN Gewen YI Yu SHAN Sang The PHAM Anh Kiet TIEU Yan LI Rendong WANG state key laboratory of Solid Lubrication Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China Center of materials Science and Opto-Electronics Engineering University of Chinese Academy of SciencesBeijing 100049China Faculty of Engineering and Information Sciences University of WollongongWollongong 2522Australia state key laboratory of metal materials for marine equipment and application Anshan 114009China Ansteel Iron&Steel Research Institute Anshan 114009China

A comparative evaluation of the friction and wear behaviors of 40CrNiMoA steel and Inconel 718 alloy sliding against Si_(3)N_(4) counterparts was conducted over a large temperature range from room temperature(RT)to 800℃.The temperature‐dependent tribological properties associated with the resulting chemical mitigation and structural adaptation of the solid sliding surface were clarified by surface/interface *** results revealed desirable performance in reducing friction and wear at elevated temperatures,which was associated with the resulting oxide composite filmʹs adaptive lubricating capability,whereas severe abrasive wear occurred at room/ambient *** oxidative‐abrasive differentials for the two alloys were further discussed by considering the combined effect of temperature and stressed‐shearing conditions.

关键词： steel alloys high‐temperature tribology wear and friction oxidation surface/interface chemistry

Improving Li reversibility in Li metal batteries through uniform dispersion of Ag nanoparticles on graphene

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Rare metals 2022年第10期41卷 3391-3400页

作者： Yu Gao Bing-Feng Cui Jia-Jun Wang Zhao-Yong Sun Qiang Chen Yi-Da Deng Xiao-Peng Han Wen-Bin Hu School of materials Science and Engineering Tianjin Key Laboratory of Composite and Functional Materials Key Laboratory of Advanced Ceramics and Machining TechnologyTianjin UniversityTianjin300350China Joint School of National University of Singapore and Tianjin University International Campus of Tianjin UniversityFuzhou350207China China Energy Lithium Co. LtdTianjin300072China state key laboratory of marine Resource Utilization in South China Sea School of Materials Science and EngineeringHainan UniversityHaikou570228China

Li metal is the most attractive and promising anode material for next-generation high-energy ***,uncontrolled Li dendrite growth during cycling remains a highly challenging *** solve this problem,silver-coated graphene(Ag/GH)was prepared via a simple liquid-phase reduction *** effect of Ag/GH on Li deposition behavior was investigated by adjusting the dispersion of Ag nanoparticles(Ag NPs).Subsequently,a composite electrode was fabricated via uniform deposition of metallic Li on Ag/*** was used as a lithiophilic nucleating agent to ensure uniform deposition of Li and inhibit the growth of Li dendrites on the *** prepared composite anode showed a significantly improved performance compared to the unmodified *** symmetric cell comprising this composite electrode exhibited a stable cycling performance with a low hysteresis of~40 mV and a lifetime of>2000 h at a current density of 0.5 mA·cm^(-2).Meanwhile,the discharge capacity reached 0.5 mAh·cm^(-2).In addition,Ag/GH was found to be amenable to large-scale ***,the composite Ag/GH anode exhibited improved performance and the preparation method showed significant potential for application in the manufacture of Li metal batteries.

关键词： Ag/graphene composite Uniform Li deposition Li anodes Li metal batteries

Deformation Behavior of Zr_(65)Cu_(17.5)Ni_(10)Al_(7.5)in Superplastic Forming with Silicon Mould: Simulation and application

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Journal of Wuhan University of Technology(materials Science) 2014年第2期29卷 250-255页

作者：杨璠 SHI Tielin YU Qiang 廖广兰 state key laboratory of Digital Manufacturing equipment and Technology Huazhong University of Science and Technology

We investigated the deformation behaviors of Zr_65Cu_17.5Ni_10Al_7.5 in superplastic forming in silicon mould via numerical modeling and experiments. The data needed for the constitutive formulation were obtained from compressive tests to establish a material library for finite-element simulation using a DEFORM 3D software. A constant speed forming process of a micro gear was modeled where the loading force, feature size and amount of deformation in the micro gear in silicon mould were analyzed in detail for the optimal requirements of micro gear forming and the protection of silicon mould. Guided by the modeling parameters, an amorphous metal micro gear was successfully obtained by our home-made superplastic forming system with the optimized parameters （temperature of 683 K, top speed of 0.003 mm/s until the load force reaching limiting value at 1960 N, and a gradually decelerating process for holding the force to the end）. Our work gives a good example for optimization of superplastic forming and fabrication of BMGs in microparts.

关键词： bulk metallic glass deformation finite-element simulation superplastic forming silicon mould

Ultrawide-band optically transparent antidiffraction metamaterial absorber with a Thiessen-polygon metal-mesh shielding layer

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光子学研究:英文版 2023年第7期11卷 1354-1363页

作者： NAITAO SONG QIAO SUN SU XU DONGZHI SHAN YANG TANG XIAOXI TIAN NIANXI XU JINGSONG GAO key laboratory of Optical System Advanced Manufacturing Technology Changchun Institute of OpticsFine Mechanics and PhysicsChinese Academy of SciencesChangchun 130033China state key laboratory of Applied Optics Changchun Institute of OpticsFine Mechanics and PhysicsChinese Academy of SciencesChangchun 130033China College of Da Heng University of Chinese Academy of SciencesBeijing 100049China state key laboratory of Integrated Optoelectronics College of Electronic Science and EngineeringJilin UniversityChangchun 130012China Jilin Provincial key laboratory of Advanced Optoelectronic equipment and Instrument Manufacturing Technology Changchun 130033China

Transparent absorbers, with a functional integration of broadband electromagnetic shielding, microwave camouflage,and optical transparency, have attracted increasing attention in the past decades. metal mesh, an artificial, optically transparent, conducting material composed of periodic metallic gratings, is the optimal choice for the microwave shielding layer of transparent absorbers because of its excellent compatibility between high transparency and low resistance. However, the micrometer-level periodicity of metallic grating concentrates the diffraction of light, which degrades the imaging quality of cameras and sensors in common. In this study, we report on a generalized Thiessenpolygon-randomization method that prevents the concentration of the diffraction of light in periodic metallic grating and demonstrate an ultrawide-band optically transparent diffraction-immune metamaterial absorber. The absorber is constructed with a multilayer indium-tin-oxide-based metasurface and a Thiessen-polygon-randomized metal-mesh reflector. The lossy metasurface provides multimode absorption, whereas the Thiessen-polygon randomization prevents the concentration of the diffraction of light. The practical sample achieves a 10 dB absorptivity and shielding effectiveness over a range of 8–26.5 GHz, and the optical transparency is also preserved over the entire visible and near-infrared regions. The point spread function and field of view are both improved by using the antidiffraction absorber. Our study paves the way for the application of optically transparent electromagnetic devices, display, and optoelectronic integration in a more practical stage. ? 2023 Chinese Laser Press.

关键词： absorber transparent polygon