医用炭/炭复合材料表面梯度CVD热解炭涂层的摩擦性能研究  

Friction of Pyrolytic Carbon Coating Prepared by Gradient CVD on Medical Carbon/Carbon Composites Surface

作　　者：倪昕晔[1,2] 汤晓斌[1] 林涛[2] 耿长冉[1] 蔡雷铭[2] 顾卫东[2] 陈达[1] 

机构地区：[1]南京航空航天大学材料科学与技术学院,南京210016 [2]南京医科大学附属常州第二人民医院,常州213003

出　　处：《无机材料学报》2012年第5期545-549,共5页Journal of Inorganic Materials

基　　金：江苏省常州市社会发展基金(CS20102019);南京航空航天大学基础科研业务费专项基金(Y1065-0630)~~

摘　　要：采用医用炭/炭复合材料并通过梯度化学气相沉积法(CVD)在其表面制备热解炭涂层,研究分析了涂层的显微结构、摩擦系数、磨损情况.结果发现,该热解炭涂层表面被直径约20μm热解炭球致密覆盖,在断口处呈现紧密、多层的热解炭.与用沥青浸渍/炭化法制备的炭/炭复合材料相比,在干摩擦时,热解炭涂层样品的摩擦系数更大;在模拟人体关节的湿摩擦时,它的摩擦系数低;在干摩擦和湿摩擦的情况下,它的磨损要小很多.这些结果表明利用梯度的化学气相沉积法(CVD)制备医用炭/炭复合材料的涂层可以提高其表面的耐磨性.Pyrolytic carbon coating was prepared by gradient chemical vapor deposition （CVD） on medical carbon/carbon composites surface. Microstructure, friction coefficient and wear capacity of the pyrolytic carbon cating were investigated. The results show that the pyrolytic carbon coating is covered densely by spherical pyrdytic carbon with dimension of about 20μm, and close, multi-layer pyrolytic carbon is shown on the fracture. Compared with carbon/carbon composite prepared by asphalt impregnated/carbonization, the friction coefficient of the byrolytic carbon coating is higher in the dry friction whereas in wet friction of simulated human joints, its friction coefficient is lower. The wear loss of the pyrolytic carbon coating is much smaller than that of the latter in dry and wet friction. It suggests that medical carbon/carbon composites surface prepared by gradient CVD can improve the wear resistance of the carbon/carbon composites

关 键 词：炭/炭复合材料 化学气相沉积 梯度 摩擦 

分 类 号：TB332[一般工业技术—材料科学与工程]