不同分子结构聚酰亚胺固体润滑膜的摩擦学性能研究 - 中国表面工程.pdf

18 3 Vol.18 No.3 2005 6 CHINA SURFACE ENGINEERING June 2005 16 2005 1,2 1 3 1. 710049 2. 550005 3. 471003 PI PI PI PI PI PI TQ323.7TB43 A 1007−9289(2005)03−0016−04 Tribological Properties of Polyimide Solid-lubricating Films with Different Structure 1.2 1 3 XU Xiao-lu ZHAO Wen-zhen SONG bang-cai 1School of Material Scienceand and Engineering, Xi’an Jiaotong University, Xi’an 7 10049 China; 2.Guiyang University, Guiyang 550005 China; 3.Henan university of Science Technology 710003 china AbstractPolyimide solid−lubricating films were prepared on nickel substrate by sintering the corresponding poly precursor dipped coating. The chemical structure of PI, PMDA−ODA and ODPA−ODA was varied, The adhesion strength, microhardness, impact strength and toughness of the coating were examined, and the tribological properties were investigated under different sliding speed and load on MM−200 model friction and wear testing machine. Scanning electron microscopy (SEM) was used to investigate the wear behavior of coating. The result showed that PI films with different structure displayed different friction and wear behavior at the same conditions. ODPA−ODA PI as flexible molecular chains showed excellent mechanical and tribological properties, and better lubricating performance at heavy load. Key words polyimide films friction coefficient 0 PI PI PI PI