INVESTIGATION OF COBALT BEHAVIOR DURING DIAMOND DEPOSITION ON CEMENTED CARBIDES

被引:27
作者
MEHLMANN, AK
BERGER, S
FAYER, A
DIRNFELD, SF
BAMBERGER, M
AVIGAL, Y
HOFFMAN, A
PORATH, R
机构
[1] TECHNION ISRAEL INST TECHNOL,INST SOLID STATE,IL-32000 HAIFA,ISRAEL
[2] ISCAR LTD,MAALOTH,ISRAEL
关键词
D O I
10.1016/0925-9635(94)90273-9
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Obtaining high quality diamond depositions on cemented carbides is hindered by the presence of cobalt. This study deals with the movement of cobalt and its interaction with diamond crystals. The deposition was carried out using a hot-filament chemical vapour deposition method and a CH4-H-2 1% gas mixture. Diamond-ground cemented carbide substrates (WC-6%Co) were used. The diamond coatings were investigated by transmission electron microscopy, scanning electron microscopy, Auger electron spectroscopy and Raman spectroscopy. It was found that the interaction between diamond and cobalt results in zones which contain small cobalt particles and disordered graphite. The disordered graphite obtained as a result of the presence of cobalt promotes nucleation of diamond.
引用
收藏
页码:805 / 809
页数:5
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