Journal of South China University of Technology (Natural Science Edition) ›› 2016, Vol. 44 ›› Issue (11): 97-102.doi: 10.3969/j.issn.1000-565X.2016.11.015

• Mechanical Engineering • Previous Articles     Next Articles

Preparation and Tribological Properties of HFCVD-Based Freestanding Thick Diamond Film

FENG Wei1,2 YANG Bin1 LU Wen-zhuang1   

  1. 1.College of Mechanical and Electrical Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,Jiangsu,China; 2.College of Mechanical Engineering,Yancheng Institute of Technology,Yancheng 224051,Jiangsu,China
  • Received:2016-03-18 Revised:2016-05-16 Online:2016-11-25 Published:2016-10-04
  • Contact: 冯伟( 1983-) ，女，博士生，讲师，主要从事表面工程、精密与超精密加工研究． E-mail:zhu5411492@163.com
  • About author:冯伟( 1983-) ，女，博士生，讲师，主要从事表面工程、精密与超精密加工研究．
  • Supported by:
    Supported by the National Natural Science Foundation of China( 51275230) and the Science and Technology Planning Project of Jiangsu Province，China( 2015057-22)

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Abstract:

A crystal growth model of freestanding thick diamond film was discussed,and on the basis of this model,a self-standing thick diamond film slice of a thickness of about 0.6mm was prepared by means of HFCVD ( Hot-Filament- Assisted Chemical Vapor Deposition) method.Then,a friction experiment of the film slice was conducted on a ball-disc tribometer,and the tribological properties of the film slices respectively with a steel ball,a ceramic ball and an aluminum ball as the friction pair were characterized by using a SEM and a Raman spectrometer.The results show that ( 1) when the friction pair is an aluminum ball,average friction coefficient is the biggest and metal transfer layer appears very fast in the initial stage of grinding; ( 2) when the friction pair is a ceramic ball,the average friction coefficient is the smallest and the ball surface material is in a fine clastic distribution; and ( 3) the wear of the film slice is very small after the experiment,which means that the film slice is a good wear-resistant material.

Key words: hot-filament-assisted chemical vapor deposition, self-standing thick diamond film, friction coefficient, wear