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Plasma preparation method and tribological properties of diamond-like carbon coating on magnesium alloy AZ31 substrate

引用

Science China(Technological Sciences) 2019年第11期62卷 1939-1947页

作者： HAN BeiBei JU DongYing SATO susumu ZHAO HuiJun Department of Electronic Engineering Graduate School of EngineeringSaitama Institute of TechnologyFukaya 369-0293Japan Advanced Science Institute Saitama Institute of TechnologyFukaya 369-0293Japan Ningbo Institute of Materials Industry Innovation Ningbo 315033China School of Mechanical Engineering Hangzhou Dianzi UniversityHangzhou 310018China Department of Information System Saitama Institute of TechnologyFukaya 369-0293Japan

Magnesium alloys are light weight and exhibit good recyclability but suffer from low hardness and wear *** this study,the hardness and wear resistance of AZ31 magnesium alloy were improved by depositing diamond-like carbon(DLC)films as hard protective coatings using ion-beam-enhanced deposition with various CH4/H2 ratio,gas flow rates and accelerating *** supporting effect of the magnesium alloy was enhanced by the production of a graded interfacial layer which is composed of film atoms and substrate *** composition and mechanical properties of the DLC coatings were characterized using scanning electron microscopy(SEM),Raman spectroscopy,Rockwell test and *** tribological properties of the coating were also investigated using a frictional surface microscope with an in situ observation system and friction force *** DLC films were characterized by a lower intensity ratio of the D-peak to G-peak(ID/IG),higher hardness,and improved tribological properties when deposited at a lower accelerating voltage(6 kV).At the CH4/H2 ratio of 1:99 and 6 sccm/6 kV,minimum ID/IG values of 0.62,relatively low friction force value of 0.12 N,and a maximum hardness of 4056HV were attained *** addition,the DLC film exhibited improved wear resistance and a shallower wear track at this condition.

关键词： DLC film magnesium alloy plasma preparation hardness wear resistance

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