Effects of vermiculite on the tribological behavior of PI-matrix friction materials

2015 Global Conference on Polymer and Composite Materials

材料科学;化学

Xu, X.L.^1 ; Lu, X.^1 ; Yang, D.L.^1 ; Zhang, E.^1

College of Materials Science and Engineering, Dalian Jiaotong University, Dalian

116028, China^1

关键词: Friction and wear performance;    Friction coefficients;    Friction Modifier;    Friction performance;    Friction test;    Heat press molding;    Matrix materials;    Tribological behaviors;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/87/1/012024/pdf
DOI  :  10.1088/1757-899X/87/1/012024

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Effects of vermiculite as a friction modifier on brake friction performance of PI-matrix materials have been tested. PI-matrix friction materials with different vermiculite content (0%, 5%, 10%, 15%, 20% in wt) were prepared by the heat-press molding method. The friction tests were carried out on a pin-on-disk tester in the speed range of 20∼120 km/h. The experimental results indicate that the effects of vermiculite on the friction and wear performance of the materials are closely related to the friction speed. At low friction speeds (between 20∼40 km/h), the friction coefficient increases with the increasing of vermiculite content. At high friction speeds (between 60∼120 km/h), the friction coefficient increases at first when vermiculite content below 10 wt% and then decreases with vermiculite content increasing. The wear rate decreases by adding 5 wt% vermiculite, and then increases. As the friction speeds above 100 km/h, the wear rate changes dramatically.