原位合成Ag/Ag2MoO4纳米复合润滑剂对YSZ涂层摩擦学性能的影响  

Effects of In-Situ Synthesis Nanoscale Ag/Ag2MoO4 Composite Lubricants on Tribological Properties of YSZ Coatings

作　　者：杨晶晶 陕钰[1] 付英英 乔竹辉[1,3] 贾均红 易戈文[1] 王文珍[1] YANG Jingjing;SHAN Yu;FU Yingying;QIAO Zhuhui;JIA Junhong;YI Gewen;WANG Wenzhen(State Key Laboratory of Solid Lubrication,Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences,Gansu Lanzhou 730000,China;Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100049,China;Qingdao Center of Resource Chemistry&New Materials,Shandong Qingdao 266000,China)

机构地区：[1]中国科学院兰州化学物理研究所固体润滑国家重点试验室,甘肃兰州730000 [2]材料与光电研究中心,中国科学院大学,北京100049 [3]青岛市资源化学与新材料研究中心,山东青岛266000

出　　处：《摩擦学学报》2019年第6期756-765,共10页Tribology

基　　金：国家自然科学基金项目(51575505,51675508,51471181)资助~~

摘　　要：通过大气等离子喷涂工艺制备了氧化钇稳定氧化锆(YSZ)涂层,采用真空浸渍技术和水热合成的方法,将含有反应物离子或分子的前驱体溶液引入YSZ涂层内部固有的微裂纹和孔洞等缺陷中,并在缺陷中原位合成了直径约78~111 nm的Ag/Ag2MoO4类球形纳米颗粒,首次制备出了YSZ-Ag/Ag2MoO4复合涂层.摩擦试验结果表明:与YSZ涂层相比,YSZ-Ag/Ag2MoO4复合涂层由于在室温和600℃下形成了润滑层,抑制了YSZ涂层摩擦表面的脆性断裂和磨粒磨损,从而显著降低了涂层的摩擦系数和磨损率,有效提高了涂层的摩擦学性能.In virtue of the intrinsic defects(micro-cracks and pores)of yttria-stabilized zirconia(YSZ)coatings fabricated by air plasma spraying,Ag/Ag2MoO4 were in-situ synthesized inside the pure YSZ coatings via vacuum impregnation process coupled with hydrothermal reaction.Results show that the generated Ag/Ag2MoO4 were sphericallike nanoparticles with the diameter of 78~111 nm and YSZ-Ag/Ag2MoO4 composite coatings were successfully fabricated.The results of tribological tests present that the composite coatings possessed a lower friction coefficient and an extremely lower wear rate compared with the pure YSZ coatings at room temperature(RT)and 600℃.The excellent lubricating and were-resistant properties were ascribed to the formation of the smooth lubricating layers on the worn surfaces of composite coatings,thus effectively restraining the brittle fracture and abrasive wear of pure YSZ coatings.

关 键 词：Ag/Ag2MoO4 真空浸渍 水热反应 大气等离子喷涂YSZ涂层 摩擦磨损 

分 类 号：TH117.3[机械工程—机械设计及理论]