YI Deliang1,2, YEYinping1*, YIN Bin1,2, LIU Guang1,2, ZHOU Huidi1, CHEN Jianmin1
(1. State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China 2. Graduate School of the Chinese Academy of Sciences, Beijing 10039, China)
Abstract: Series of Al2O3/TiO2 nanocomposite powders synthesized by sol-gel method were spray dried, and series of nanocomposite coatings were prepared by plasma spraying using the spray dried powders. The nanocomposite coating had a semi-molten zone and melting zone of dual-zone nanocomposite structures. The friction and wear properties of the coatings were investigated on a UMT-2MT tester. The results indicate that the wear rate of the coatings first decreased and then increased with the increasing TiO2 content, and the coating with 10% TiO2 had the lowest wear rate. The friction coefficients of the coatings were in the range of 0.6 to 0.8. The wear mechanism of the nanocomposite coating was mainly due to the spalling caused by crack propagation.
Key words: Al2O3/TiO2; plasma spray; nanocomposite coating; friction and wear
E-mail: yeyinping585@sina.com
Tribology, Vol. 31, Issue 4, 2011, 362~368
