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Home  >  Journal list  >  Journal of the Ceramic Society of Japan  >  Vol.117  No.1365 (May) (2009)  >  pp.650-653

Journal of the Ceramic Society of Japan
<<Previous article Vol.117  No.1365 (May) (2009)   pp.650 - 653 Next article>>

Adhesion of nanodiamond seeded CVD diamond on ceramic substrate

Min-Goon JUNG1), Jong-Hoon KIM1), Seung-Koo LEE1), Yoon-Suk OH2) and Dae-Soon LIM1)
1) Department of Material Science and Engineering, Korea University
2) Korea Institute of Ceramic Engineering and Technology

  Conventional structural ceramic substrates were coated with 1 μm thick polycrystalline CVD diamond layer by using the hot filament CVD system and subsequently tested. The substrates chosen were silicate, alumina, silicon nitride, and silicon carbide ceramics. To achieve a high nucleation density and to improve the adhesion between the diamond and the ceramic substrate, the newly developed Electrostatic Self-Assembly of Nano Diamond (ESAND) seeding method was used. This seeding method initiates the growth of crystalline diamond. For this seeding procedure, each negatively charged substrate surface was covered with a cationic polymer monolayer. Next, anionic polymer coated cationic nanodiamond particles were attached to the substrate by the electrostatic self-assembly process. The degree of adhesion between the diamond film and each substrate was investigated by micro-scratch testing. These tests involved the use of a Rockwell C indenter (r = 0.2 mm), which scratched the samples at a speed of 10 mm/min under a progressive normal load (from 0 to 21N). The morphology of the poly-crystalline diamond films on the various substrates was analyzed using Raman spectroscopy.

CVD diamond, Wear resistant coating, Ceramic wear

Received: November 14, 2008
Accepted: February 19, 2009 , Published online: May 01, 2009
Copyright (c) 2009 The Ceramic Society of Japan



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