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通过控制化学气相沉积工艺条件,得到粗糙层、光滑层、过渡结构、各向同性等几种具有不同微观结构的热解炭.通过金相观察、石墨化度、摩擦磨损性能的测试,得出:热解炭的微观结构对炭/炭复合材料的摩擦磨损性能有较大影响;制动过程中形成的薄膜使摩擦因数降低;粗糙层结构的炭/炭复合材料石墨化程度高,摩擦因数高,线型平稳,且随着压力的增加,其力矩上升明显,是一种优良的摩擦材料;光滑层结构的炭/炭复合材料石墨化度低,摩擦因数低,磨损小.
By controlling the chemical vapor deposition process conditions, several pyrolytic carbons with different microstructures, such as rough layer, smooth layer, transitional structure and isotropy, were obtained.The results of metallographic observation, degree of graphitization and friction and wear properties show that : The microstructure of pyrolytic carbon has a great influence on the friction and wear properties of carbon / carbon composites; the film formed during braking reduces the friction coefficient; the carbon / carbon composites of rough layer structure have a high graphitization degree and the friction coefficient High and linear, and its torque increases obviously with the increase of pressure. It is an excellent friction material. The smooth carbon / carbon composite with low layer structure has low graphitization degree, low friction coefficient and low wear.