选取由CVD预增密至一定密度 ,再进行树脂浸渍 炭化补充增密至 1.85g cm3的炭 炭复合材料作摩擦环试样 .测试了该试样在一系列刹车速度时的摩擦磨损性能 ,并对其摩擦面及磨屑进行了SEM观察 ,对摩擦面进行显微喇曼光谱分析 .研究结果表明 :炭 炭复合材料的摩擦磨损性能随刹车速度的变化而发生显著变化 ,在 10m s时出现最高峰 ,在 2 5m s出现亚高峰 ;磨损量随刹车速度的增加而增加 ,而氧化磨损在刹车速度为 2 5m s时开始大量产生 ,在 2 8m s时达最大值 .其摩擦表面形貌、结构及磨屑亦有较大差别 .刹车速度从 5m s升至 2 0m s时 ,摩擦面石墨化度降低 ,石墨结构向无定型碳结构转变 ,但在高速时石墨化度反而升高 ,无定型碳结构又向石墨结构转变 The carbon-carbon composites were pre-densified by CVD to a certain density, and then carbonized by resin impregnation to enrich the carbon-carbon composite material with a density of 1.85g cm3 for the friction ring specimen.The friction and wear properties of the sample at a series of brake speeds were tested and The friction surface and wear debris were observed by SEM and the Raman spectra of the friction surface were analyzed.The results show that the friction and wear properties of the carbon composite material change significantly with the brake speed and appear at 10m s The peak appeared at 25m s, the subsidence increased with the increase of braking speed, while the oxidation wear started massively when the braking speed was 25m s, reaching the maximum at 28m s.The friction surface topography , The structure and wear debris also have a big difference.When the braking speed increases from 5m s to 20m s, the graphitization degree of the friction face decreases and the graphite structure changes to the amorphous carbon structure, but the graphitization degree increases at high speed, Amorphous carbon structure and graphite structure change