炭布/树脂复合摩擦材料的湿式摩擦学性能

Wet tribology performance of carbon fabric/resin composites

基于炭布优异的摩擦磨损性能、自润滑性能以及低密度等特点,将其应用于湿式摩擦材料中,以适应高转速、大压力或润滑不充分等极端工况。分别以1K、3K和6K碳布为增强体,制备出三种炭布/树脂复合摩擦材料,研究了其湿式摩擦学性能。结果表明:随着纤维束内单丝数量的增加,摩擦材料的瞬时制动稳定性降低,动摩擦系数减小,但是耐磨性能提高。所有摩擦材料的磨损率小于1.10×10-5 mm3/J,表现出较好的耐磨性能,并且对偶材料的磨损率很小,仅为0.40×10-5 mm3/J。磨损主要表现为纤维断裂、拔出及树脂脱粘等形式,但是在磨损表面没有形成大尺寸磨屑和明显的"第三体"磨粒,导致摩擦材料和对偶材料的磨损率较小。

In order to adapt the unusual operating conditions such as high insufficient lubrication and so on, the carbon fabric was applied to wet friction performance, self-lubricating and low density. Three kinds of carbon fabric/r 1 K, 3 K and 6 K carbon fabric as reinforcement, respectively, and the wet fabric/resin composites were investigated. The experimental results show tha and the in fiber dynamic bundle. ng speed, excessive load and sites for its excellent tribology mposites were developed with gy performance of the carbon nstantaneous braking stability rotatl compo esin co tribol0 t the i friction coefficient decreases, but the wear resistance enhances with the increase of monofilaments The wear rates of all composites are less than 1. 10 ）〈 10-5 mma/J, indicating excellent wear resistance of the composites. The wear rates of couple plates are small too, which is only about 0.40X 10 -5 mma/J. The breakage and removal of carbon fibers along with resin peeling off from the surface appear to be the dominant wear mechanism, but no large size of wear debris and ＂third body＂ abrasive particles embedded into the matrix were formed which effectively avoids severe abrasion of the friction materials and the eounle plates.