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Adhesion and friction performance of DLC/rubber:The influence of plasma pretreatment

Friction 2021年第3期9卷 627-641页

作者： Changning BAI Zhenbin GONG Lulu AN Li QIANG Junyan ZHANG Georgy YUSHKOV Alexey NIKOLAEV Maxim SHANDRIKOV Bin ZHANG Key Laboratory of Science and Technology on wear and Protection of Materials Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China High Current Electronics Institute Russian Academy of SciencesTomsk 634055Russia

Diamond-like carbon(DLC)films are deposited on rubber surfaces to protect the rubber components,and surface pretreatment of the rubber substrates prior to the film deposition can improve the adhesion between the DLC films and the ***,the principal purpose of this work concentrates on determining the effects of argon(Ar),oxygen(O_(2)),nitrogen(N_(2)),and hydrogen(H_(2))plasma pretreatments on the adhesion and friction performance of the DLC films deposited on rubber(DLC/rubber).The results indicated that the Ar plasma pretreatment promoted the formation of a compact layer on the rubber *** contrast,massive fillers were exposed on the rubber surface after oxygen or nitrogen plasma ***,the typical micrometer-scale patches divided by random cracks were observed on the surface of DLC/rubber,except for the sample pretreated with oxygen *** adhesion of DLC/rubber was found to strengthen with the removal of weak boundary layers and the generation of free radicals on the rubber surface after plasma *** tribo-tests revealed that DLC/rubber with O_(2),N_(2),and H_(2) plasma pretreatments cannot achieve optimal friction ***,DLC/rubber with Ar plasma pretreatment exhibited a low and stable friction coefficient of 0.19 and superior wear resistance,which was correlated to the high adhesion,good load-bearing of the rubber surface,and the approximate sine function of the surface profile of the DLC film.

关键词： diamond-like carbon(DLC)films rubber plasma pretreatment adhesion friction

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High-throughput development and applications of the compositional mechanical property map of the β titanium alloys

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Journal of Materials Science & Technology 2021年第12期71卷 201-210页

作者： Jinfeng Ling Dandan Huang Kewu Bai Wei Li Zhentao Yu Weimin Chen Institute of Advanced wear&Corrosion Resistant and Functional Materials Jinan UniversityGuangzhouGuangdong510632China Guangxi Key Laboratory of Processing for Non-ferrous Metal and Featured Materials Guangxi UniversityNanningGuangxi530004China Institute of High Performance Computing Agency for ScienceTechnology and ResearchSingapore138632Singapore

By a combination of the nanoindentation and electron probe microanalysis(EPMA)techniques,the traditional diffusion couple technique is extended to map the mechanical property of β-type Ti alloys over a wide composition range,which can be utilized to develop very versatile novel bio-Ti alloys for hard tissue re placements in arti ficial bones,joints,and dental *** create complete single-phase composition ranges of Ti-based bcc solid solution,12 types of bcc Ti-Nb-Zr-Mo/Ti-Nb-Zr-Ta quaternary diffusion couples were fabricated and annealed at 1273 K for 25 *** this way,the composition-mechanical property relationships in the vast composition space of Ti-based alloys were established using EPMA and nanoindentation ***,the measured composition-dependent Young’s moduli,hardness,and elastic recovery as well as the derived ratio of hardness to Young’s modulus,and the ratio of the cube of hardness to the square of Young’s modulus,in the developed compositional mechanical property database,were visualized in a five-dimensional scatter *** enables an effective tool to screen the Ti-Nb-Zr-based alloys fororthopedic and dental applications according to different clinical requirements,and to rationalize the fundamental mechanical relationships in the rapid development of β-Ti alloys.

关键词： Mechanical properties Ti–Nb–Zr–Mo and Ti–Nb–Zr–Ta alloys Diffusion couple Nanoindentation

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Effects of TaN nanoparticles on microstructure,mechanical properties and tribological performance of PEEK coating prepared by electrophoretic deposition

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Transactions of Nonferrous Metals Society of China 2022年第10期32卷 3334-3348页

作者： Lin CAO Peng ZHANG Shuang-jian LI Qi-wei WANG Da-hai ZENG Chuan-yong YU Qing-yang LI Yu-wen LIAO Zhi-dan LIN Wei LI Institute of Advanced wear&Corrosion Resistant and Functional Materials Jinan UniversityGuangzhou 510632China Shaoguan Research Institute of Jinan University Shaoguan 512027China

In order to solve the friction,wear and lubrication problems of titanium,a series of TaN/ployether−ether−ketone(PEEK)coatings were developed by electrophoretic deposition,and the effects of TaN nanoparticles on the microstructure,mechanical properties and tribological performance of coatings were *** manifest that the introduction of TaN nanoparticles into PEEK coatings could improve the deposition efficiency,enhance the resistant deform capacity,increase the hardness,elastic modulus and adhesive bonding *** with the pure PEEK coating,the friction coefficient of P-TN-3 was greatly reduced by 31.25%.The wear resistance of P-TN-3 was also improved in huge boost,and its specific wear rate was decreased from 9.42×10^(−5) to 1.62×10^(−5) mm^(3)·N^(−1)·m^(−1).The homogeneous composite TaN/PEEK coatings prepared by electrophoretic deposition were well-adhered to the titanium alloy substrate,TaN nanoparticles could improve the strength of PEEK coating,and provide wear-resistance protection for titanium alloys.

关键词： ployether−ether−ketone coating tantalum nitride particle reinforcement microstructure mechanical properties biotribology

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Evaluation of the biodegradation product layer on Mg-1Zn alloy during dynamical strain

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Journal of Magnesium and Alloys 2021年第5期9卷 1842-1855页

作者： Lianxi Chen Cheng Guo Carsten Blawert Junjie Yang Dongchu Chen Xiaojian Wang Zhentao Yu Mikhail L.Zheludkevich Wei Li School of Materials Science and Hydrogen Energy Foshan UniversityFoshanGuangdong 528000China Institute of Advanced wear&Corrosion Resistant and Functional Materials Jinan UniversityGuangzhou 510632China Institute of Surface Science Helmholtz-Zentrum HereonGeesthacht 21502Germany College of Mechatronics and Control Engineering Shenzhen UniversityShenzhen 518060China

Magnesium(Mg)alloys are attractive biodegradable implant *** degradation products on Mg alloys play a critical role in the stability of the interface between implant and surrounding *** the present study,the effects of dynamic deformation on the interface layer of biomedical Mg-1Zn alloy were investigated using the constant extension rate tensile tests(CERT)coupled with electrochemical impedance spectroscopy(EIS).The deformation of the Mg-1Zn alloy had an adverse influence on the impedance of the surface degradation layer formed in simulated body fluid that only containing inorganic ***,the surface degradation layer with improved corrosion resistance was obtained for the strained samples tested in protein-containing simulated body *** spontaneous or enhanced adsorption of protein into the degradation product led to a flexible and stable hybrid anti-corrosive layer.A relationship between the dynamic deformation of Mg alloy and the impendence of the degradation layer was established,which demonstrates the necessity for in situ characterisation of the evolution of the surface layer under dynamic condition.

关键词： Degradation layer Protein Biodegradable Mg alloy Dynamic deformation Impedance

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Effect of Process Parameters on the Agglomeration Behavior and Tensile Response of Graphene Reinforced Magnesium Matrix Composites Based on Molecular Dynamics Model

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Computer Modeling in Engineering & Sciences 2024年第12期141卷 2453-2469页

作者： Chentong Zhao Jiming Zhou Xujiang Chao Su Wang Lehua Qi School of Mechanical Engineering Northwestern Polytechnical UniversityXi’an710072China Shanxi Key Laboratory of Fiber Reinforced Light Composite Materials Northwestern Polytechnical UniversityXi’an710072China Future Intelligent wear Centre School of Fashion and TextilesThe Hong Kong Polytechnic UniversityHong Kong999077China

The mechanical properties of graphene reinforced composites are often hampered by challenges related to the dispersion and aggregation of graphene within the *** paper explores the mechanism of cooling rate,process temperature,and process pressure’s influence on the agglomeration behavior of graphene and the tensile response of composites from a computer simulation technology,namely molecular *** findings reveal that the cooling rate exerts minimal influence on the tensile response of ***,processing temperature significantly affects the degree of graphene aggregation,with higher temperatures leading to the formation of larger-sized graphene *** contrast,processing pressure exhibits negligible impact on the degree of graphene aggregation,and increasing pressure effectively mitigates the formation of large-sized graphene ***,we elucidate the intrinsic factors governing the mechanical response to variations in processing ***,we observe that the stretching process facilitates the decomposition of large-sized graphene clusters into smaller *** research contributes to the advancement of lightweight metal matrix composites by offering insights into optimizing processing ***,it provides crucial theoretical underpinnings for developing high-performance graphene-reinforced composites.

关键词： Agglomeration behavior GNPs/Mg composite tensile response molecular dynamics

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Catalytic transformation of 4-nitrophenol into 4-aminophenol over ZnO nanowire array-decorated Cu nanoparticles

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Green Chemical Engineering 2024年第2期5卷 205-212页

作者： Anlin Feng Chaoyu Lin Huiqin Zhou Weihong Jin Yidong Hu Dongyang Li Qingyang Li Institute of Advanced wear&Corrosion Resistant and Functional Materials Jinan UniversityGuangzhou510632China School of Chemical Engineering and Technology Hebei University of TechnologyTianjin300401China Department of Chemical and Materials Engineering University of AlbertaEdmontonT6G 2H5Canada

To realize economical and effective removal of hazardous 4-nitrophenol from the environment,we developed an easily recyclable ZnO nanowire array decorated with Cu *** salix argyracea-shaped structure not only provides a platform to achieve stable and good dispersion of Cu nanoparticles,but also offers a great deal of catalytically active *** density functional theory calculations reveal that ZnO and Cu have a very beneficial synergistic effect on their catalytic *** synergy is ascribed to the electronic localization occurring at ZnO/Cu interface,which helps improve Cu nanoparticle’s ability to adsorb electro-negatively 4-nitrophenolate ions and to capture hydrogen radicals,thereby accelerating the hydrogen transfer from metal hydride complex to *** from these characteristics,it exhibits high efficiency and reusability towards the catalytic reduction of waste 4-nitrophenol to valuable 4-aminophenol with a rate constant of 43.02×10^(-3)s^(-1)and an average conversion of 96.5%in 90 s during 10 *** activity is superior to that of most reported noble-or non-noble-metal powder,bulk,coating,and array catalysts,indicating its competitive advantages in cost and efficiency,as well as enticing application prospects.

关键词： ZnO nanowire Cu nanoparticle Nano-heterojunction 4-Nitrophenol catalytic reduction Density functional theory

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Microstructure and texture evolution in LZ91 magnesium alloy during cold rolling

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Journal of Magnesium and Alloys 2018年第1期6卷 77-82页

作者： Wen-hui Liu Xiao Liu Chang-ping Tang Wei Yao Yang Xiao Xu-he Liu Key Laboratory of High Temperature wear Resistant Materials Preparation Technology of Hunan Province Hunan University of Science and TechnologyXiangtanHunan 411201China Department of Light Metal Zhengzhou Non-ferrous Metals Research Institute Co.Ltd of CHALCOZhengzhou 450041China

LZ91 magnesium alloy extruded sheets were subjected to cold *** microstructure and texture evolution were tracked using optical microscopy(OM)and X-ray diffraction(XRD).Theα-Mg andβ-Li phases were elongated along rolling direction(RD),contributing to the formation of a thin lamellar“sandwich”***“sandwich”structure is favored for glissile dislocation ofα-Mg phase during ***α-Mg andβ-Li phases are near Burgers orientation relationship,resulting in an unusual RD texture component in(0002)pole figure.

关键词： LZ91 Microstructure Texture Burgers orientation relationship

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Research perspective and prospective of additive manufacturing of biodegradable magnesium-based materials

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Journal of Magnesium and Alloys 2023年第5期11卷 1485-1504页

作者： Qingyun Fu Wenqi Liang Jiaxin Huang Weihong Jin Baisong Guo Ping Li Shulan Xu Paul K.Chu Zhentao Yu Center of Oral Implantology Stomatological HospitalSouthern Medical UniversityGuangzhou 510280China Institute of Advanced wear&Corrosion Resistant and Functional Materials Jinan UniversityGuangzhou 510632China Department of Physics Department of Materials Science and Engineeringand Department of Biomedical EngineeringCity University of Hong KongTat Chee AvenueKowloonHong KongChina

Biodegradable metals such as magnesium(Mg)and its alloys have attracted extensive attention in biomedical research due to their excellent mechanical properties and ***,traditional casting,extrusion,and commercial processing have limitations in manufacturing components with a complex shape/structure,and these processes may produce defects such as cavities and gas pores which can degrade the properties and usefulness of the *** to conventional techniques,additive manufacturing(AM)can be used to precisely control the geometry of workpieces made of different Mg-based materials with multiple geometric scales and produce desirable medical products for orthopedics,dentistry,and other ***,a detailed and thorough understanding of the raw materials,manufacturing processes,properties,and applications is required to foster the production of commercial Mg-based biomedical components by *** review summarizes recent advances and important issues pertaining to AM of Mg-based biomedical products and discusses future development and application trends.

关键词： Magnesium-based materials Additive manufacturing Wires and powders Biomedical metallic materials Medical devices

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Molecular design of recyclable thermosetting polyimide and its composite with excellent mechanical and tribological properties

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Friction 2024年第3期12卷 452-461页

作者： Xiaoyue WANG Zenghui YANG Tingmei WANG Qihua WANG Xinrui ZHANG Song LI Key Laboratory of Science and Technology on wear and Protection of Materials Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China

Recyclability of thermosetting polymers and their composites is a challenge for alleviating environmental pollution and resource *** this study,solvent-recyclable thermosetting polyimide(PI)and its composite were successfully *** tensile strength,elongation at break,and Young’s modulus of PI are 108.70±7.29 MPa,19.35%±3.89%,and 2336.42±128.00 MPa,*** addition of reduced graphene oxide(RGO)not only enhances the mechanical properties of PI but also endows it with excellent tribological *** PI illustrates a high recycling efficiency of 94.15%,but the recycled composite exhibits inferior mechanical *** recycling and utilization of PI and its composite are realized through imine bonds(-C=N),which provides new guidance for solving the problem of environmental pollution and resource waste and is potential application in the field of sustainable tribology.

关键词： thermosetting polyimide(PI) recyclability dynamic covalent bonds friction and wear polymer composites

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Tribology behaviors of Ti-Ni51.5 at% shape memory alloy with different microstructures and textures

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Rare Metals 2021年第12期40卷 3616-3626页

作者： Rui Yang Song Li Nan Zhang Chao Wang Ting-Mei Wang Qi-Hua Wang Key Laboratory of Science and Technology on wear and Protection of Materials Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China

The microstructure characteristics of TiNi alloy were investigated to elucidate the active deformation mechanisms during hot rolling and the corresponding tribology *** deformation was mainly dominated by a combination of mechanical twinning involving the {114}_(B2) and {112}_(B2) twins,dislocations,and stacking faults during the manufacturing ***,various heat treatments were performed to differentiate the discrepancies in tribological behaviors of hot-rolled and heattreated ***-rolled microstructures with high defect density approximate to nanoscale precipitates through aging as the wear resistance of the alloy improves,albeit it is softer compared to the aged *** demonstrated by the X-ray diffraction(XRD) results of the wear tracks,microstructures undergo the stress-induced martensitic(SIM) transformation during dry *** differential scanning calorimetry(DSC) analysis,the martensitic transformation temperature is lowered by defects in the austenite *** activation of the SIM transformation can be a sluggish process owing to the effect of twinning,where both primary and secondary twins are ***,a reversible transformation that is related to pseudoelasticity causes a decrease in wear volume at room temperature,which is higher than the austenite finish ***,abrasive wear advances toward ***,the hot-rolled sheet with y fiber-{111}//ND(normal direction) exhibits better wear resistance compared to the sheet with α fiber-{100}//ND.

关键词： B2 twin Texture Precipitates Tribology performance Ti-Ni51.5 at%

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