无机材料学报 ›› 2012, Vol. 27 ›› Issue (5): 545-549.DOI: 10.3724/SP.J.1077.2012.00545 CSTR: 32189.14.SP.J.1077.2012.00545

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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

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   

  1. (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)
  • 收稿日期:2011-06-28 修回日期:2011-09-12 出版日期:2012-05-10 网络出版日期:2012-03-31
  • 作者简介:倪昕晔(1975-), 男, 博士研究生. E-mail: nxy2000@yahoo.com.cn
  • 基金资助:
    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)

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

NI Xin-Ye1,2, TANG Xiao-Bin1, LIN Tao2, GENG Chang-Ran1, CAI Lei-Ming2, GU Wei-Dong2, CHEN Da1   

  1. (1. College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China; 2. Second People’s Hospital of Changzhou, Nanjing Medical University, Changzhou 213003, China)
  • Received:2011-06-28 Revised:2011-09-12 Published:2012-05-10 Online:2012-03-31
  • About author:NI Xin-Ye. E-mail: nxy2000@yahoo.com.cn

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20 μm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.

关键词: 炭/炭复合材料, 化学气相沉积, 梯度, 摩擦

Abstract:

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 20 μm, 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.

Key words: carbon/carbon composites, CND, gradient, friction

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