Solid State Science and Technology, Vol. 15, No 2 (2007) 22-27
SYNTHESIS OF DIAMOND COATING FROM METHANE GAS IN MICROWAVE PLASMA ENVIRONMENT
R.J. Talib1, J.J. Mohamed2 and A.H. Hashim1
1Advanced Materials Research Centre (AMREC),
SIRIM Bhd,.Lot 34, Jalan Hi-Tech 2/4,
Kulim Hi-Tech Park, 09000 KULIM, Malaysia
2School of Material and Mineral Resources Engineering
Universiyi Sciences of Malaysia, Engineering Campus
14300 Nibong Tebal, Pulau Pinang
Thin diamond film can be employed as a protective, hard and inert coating on metallic materials. But, the application of diamond on metal, such as steel material is restricted, mainly because of poor adhesion between diamond films and the metal substrate. Diamond film cannot be formed directly on the steel surface because the precursor gas, methane, simply diffuses into the substrate, thus hindering the diamond nucleation. In this work, a diffusion barrier of carbonitriding layer was employed as a pretreatment process before diamond deposition. It was noticed that an interlayer by plasma carbonitriding was an effective method in improving the nucleation of diamond coating on steel substrate.
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