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在 MM- 10 0 0型摩擦磨损试验机上考察了碳布叠层结构的 C/C复合材料在不同速度下的制动摩擦磨损行为 ,并用扫描电子显微镜观察分析了试样磨损表面形貌 .结果表明 :随着刹车速度的增大 ,摩擦系数增大 ,在 2 0～ 2 5 m/s速度范围出现峰值 ;当刹车速度增大至 2 8～ 30 m/s时 ,摩擦系数仍保持较高 ,体现了优良的高能摩擦特性 ;磨损量在低速时较小 ,当刹车速度大于 15 m/s时 ,磨损量迅速增大 ;低速时磨损表面由一层薄的磨屑层所覆盖 ,当速度大于 15m/s时 ,大量的磨屑形成一层较厚的磨屑层 ,高速时由于剧烈的氧化和剪切作用 ,很多基质碳被氧化剥落 ,炭纤维被磨断、拔出 ,使磨损增大
The frictional wear behavior of C / C composites with carbon cloth at different speeds was investigated on a MM-100 friction and wear tester, and the wear surface morphology of the samples was observed by scanning electron microscopy. It shows that with the increase of brake speed, the friction coefficient increases and peaks in the speed range of 20 ~ 25 m / s. When the braking speed increases to 28 ~ 30 m / s, the friction coefficient remains high , Showing excellent high-energy friction characteristics; the amount of wear is small at low speeds, and the amount of wear increases rapidly when the braking speed is greater than 15 m / s; the wear surface is covered by a thin layer of wear debris at low speeds, When more than 15m / s, a large amount of wear debris to form a thick layer of wear debris, high speed due to severe oxidation and shear, a lot of matrix carbon is oxidized exfoliation, carbon fiber is worn out, pull out, so wear increased Big