ICSV26

A new type of composites based on polytetrafluoroethylene(PTFE) applied for water lubricated bearing were prepared. The composite materials were composed of PTFE matrix and dispersed inorganic fillers. This study employed glass fiber, graphite and carbon fiber as the fillers. The formula of composites were designed by orthogonal experimental method(OEM) in which 3 levels of each kind of fillers were set. PTFE suspension resin and fillers were mixed uniformly then moulded and sintered. The friction noise and tribological properties including vibration acceleration level, volume wear rate and coefficient of friction(COF) were investigated on MRH-3A tribological test machine. Compared with typical rubber bearing materials, the PTFE-based composites performed remarkable noise-reduction properties, which would not generate abnormal friction noise at any sliding speed against metal ring. Moreover, the composites showed better wear-resistance than rubber. PTFE-based composite containing 5 wt% glass fiber, 15 wt% graphite and 15 wt% carbon fiber gained lowest volume wear rate.