M.
Gowri, W.J.P. van Enckevort, J.J. Schermer, J.P. Celis, J.J. ter
Meulen, J.G. Buijnsters,
Growth
and adhesion of hot filament chemical vapor deposited diamond coatings
on surface modified high speed steel,
Diam. & Rel. Mat. 18 (2009)
1450-1458
Abstract:
Diamond coatings were deposited by
hot filament chemical vapor deposition on high speed steel substrates.
Iron boride diffusion barrier and WC-Co layers were used as
interlayers. At high deposition pressure, the quality of the diamond
deposits is poor due to the extensive formation of graphitic deposits.
At low pressure. diamond films of better quality were obtained, but
their adhesion to the substrate was insufficient. A two-step deposition
process at low pressure was developed. In a first deposition step
performed at high methane percentage, a high nucleation density was
achieved. In a second deposition step, the methane percentage was
reduced to achieve continuous, dense, and adherent diamond layers on
borided or WC-Co coated high speed steel substrates. Adhesion of these
diamond layers on the surface modified high speed steel substrates was
tested based on reciprocating sliding tests.