氧化镧对纳米Al2O3-13TiO2等离子喷涂层的摩擦磨损性能影响  

The Influence of La_2O_3 on Friction and Wear Properties of Nano Al_2O_3-13TiO_2 Coating by Plasma Spraying

作　　者：王延彦[1] 杜三明[1,2] 肖宏滨 张永振 

机构地区：[1]河南科技大学材料科学与工程学院河南洛阳471003 [2]河南省材料摩擦学重点实验室河南洛阳471003

出　　处：《润滑与密封》2013年第8期36-40,共5页Lubrication Engineering

基　　金：国家自然科学基金项目(U1034002);河南省教育厅自然科学研究项目(2011A430012)

摘　　要：以添加少量氧化镧的团聚纳米Al2O3-13%TiO2粉末为原料,利用等离子喷涂技术制备纳米陶瓷涂层,在MMS-1G型高速摩擦磨损试验机上考察其摩擦磨损性能,并利用扫描电镜和能谱仪表征其磨损表面。结果表明:添加1%氧化镧的涂层具有更低的孔隙率,更高的抗拉结合强度;在高速摩擦磨损试验过程中,氧化镧可起到降低摩擦因数及磨损率的作用,添加1%氧化镧的纳米涂层摩擦磨损性能优良。磨损是由涂层微裂纹扩展导致的涂层剥落引起的,黏着磨损显著。The nano-ceramic coating was prepared by plasma spraying of nano Al2O3-13TiO2 powders with a small amount of La203. The friction properties were tested on the MMS-1 G high-speed friction and wear tester, and the morpholo- gy after wear was observed by scanning electron microscopy. The results show that the coatings with 1% La2 03 have a lower porosity, and a higher adhesive strength. During the high-speed friction and wear test, lanthanum oxide can reduce the fric- tion coefficient and wear rate, and the nano coatings with 1% La203 have excellent friction and wear properties. Wear is caused by coating spalling due to micro-crack expanding, the characteristic of adhesive wear is outstanding. Keywords： plasma spraying; nano coating; friction coefficient; wear rate

关 键 词：等离子喷涂 纳米涂层 摩擦因数 磨损率 

分 类 号：TH117.1[机械工程—机械设计及理论]