Microstructure and Tribological Behavior of Self-lubricating(Si:N)-DLC/MAO Coatings on AZ80 Magnesium Substrate  

作　　者：Wei YANG Zhennan DENG Dong ZHANG Peiling KE Aiying WANG 

机构地区：[1]School of Materials Science and Chemical Engineering,Xi an Technological University [2]Ningbo key laboratory of Marine Protection Materials,Ningbo Institute of Materials Technology and Engineering,Chinese Academy of Sciences [3]Department of Prosthodontics,School & Hospital of Stomatology,Wenzhou Medical College

出　　处：《Acta Metallurgica Sinica(English Letters)》2013年第6期693-698,共6页金属学报（英文版）

基　　金：the financial support of the National Natural Science Foundation of China(Grant No.51201176);Industrialization Project of Education Department of Shaanxi Province(GrantNo.2012JC13);Zhejiang Provincial Natural Science Foundation of China(Grant No.Y2110401)

摘　　要：The combined micro arc oxidation （MAO） and a hybrid beam deposition process was used to deposit duplex （Si：N）-DLC/MAO coatings on AZ80 magnesium alloy. The microstructure and composition of the duplex coatings were analyzed by Raman spectroscopy, X-ray photoelectron spectroscope （XPS）, scanning electron microscope （SEM） and atomic force microscopy （AFM）. Tribological behaviors of the coatings were studied by ball-on-disk friction test. It was found that the ID/IG ratio of the （Si：N）-DLC （diamond-like carbon） top films increases with decreasing C2H2/N2 ratio. The （Si：N）-DLC top film with SigN4 was formed on the MAO coated sample as the C2H2/N2 ratio was 10sccm：5sccm, which showed an increasing critical load compared with the pure DLC directly deposited on the Mg alloy substrate. As a result, the （Si：N）-DLC/MAO coating exhibited an advanced wear protection for the substrate.The combined micro arc oxidation （MAO） and a hybrid beam deposition process was used to deposit duplex （Si：N）-DLC/MAO coatings on AZ80 magnesium alloy. The microstructure and composition of the duplex coatings were analyzed by Raman spectroscopy, X-ray photoelectron spectroscope （XPS）, scanning electron microscope （SEM） and atomic force microscopy （AFM）. Tribological behaviors of the coatings were studied by ball-on-disk friction test. It was found that the ID/IG ratio of the （Si：N）-DLC （diamond-like carbon） top films increases with decreasing C2H2/N2 ratio. The （Si：N）-DLC top film with SigN4 was formed on the MAO coated sample as the C2H2/N2 ratio was 10sccm：5sccm, which showed an increasing critical load compared with the pure DLC directly deposited on the Mg alloy substrate. As a result, the （Si：N）-DLC/MAO coating exhibited an advanced wear protection for the substrate.

关 键 词：Mg alloy Micro arc oxidation DLC Coating MICROSTRUCTURE Tribologicalbehavior 

分 类 号：TG174.44[金属学及工艺—金属表面处理]