炭布/树脂复合摩擦材料的湿式摩擦学性能

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1 K、 3 K和6 K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。

Wet tribology performance of carbon fabric/resin composites

In order to adapt the unusual operating conditions such as high rotating speed, excessive load and insufficient lubrication and so on, the carbon fabric was applied to wet friction composites for its excellent tribology performance, self-lubricating and low density. Three kinds of carbon fabric/resin composites were developed with 1 K, 3 K and 6 K carbon fabric as reinforcement, respectively, and the wet tribology performance of the carbon fabric/resin composites were investigated. The experimental results show that the instantaneous braking stability and the dynamic friction coefficient decreases, but the wear resistance enhances with the increase of monofilaments in fiber bundle. The wear rates of all composites are less than 1.10×10^-5 mm³/J, indicating excellent wear resistance of the composites. The wear rates of couple plates are small too, which is only about 0.40×10^-5 mm³/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 couple plates.