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用碳-布叠层进行化学气相沉积制备的碳-碳复合材料环状样品,在摩擦试验机上做的自身对摩试验,获得了线速度、压力和吸收能量对摩擦系数及磨损的关系。当刹车开始时样品的线速度在2～10m/s范围内,具有一个摩擦系数的转折区,在低速和高速时的摩擦系数均比中速时小。在低制动能刹车时的磨损比高制动能刹车时的磨损大1～2个数量级,这和碳-碳复合材料的制备工艺、材料特性以及刹车时在摩擦界面上形成石墨薄膜有关。
The carbon-carbon composite ring sample prepared by chemical vapor deposition with a carbon-cloth laminate was tested for self-friction on a friction tester to obtain the relationship between linear velocity, pressure and absorbed energy on friction coefficient and wear. When the brake starts the linear speed of the sample is in the range of 2 ~ 10m / s, with a transition zone of friction coefficient, and the friction coefficient at low speed and high speed is smaller than that at medium speed. The wear on low brake energy braking is 1 ~ 2 orders of magnitude larger than the wear on high brake energy braking, which is related to the preparation process of carbon-carbon composites, material properties and the formation of graphite film on the friction interface when braking.