| 摘要 |
PURPOSE:To improve peeling resistance by forming specified microscopic ruggednesses on the surface of a hard substrate and enhancing the adhesive strength of an interface between a diamond-based coating layer and the substrate. CONSTITUTION:Microscopic ruggednesses are formed on the surface of a substrate consisting of a hard material (cemented carbide, cermet, Al2O3, silicon nitride and silicon carbide). One or more protrusions of the substrate are formed at the interface between the substrate and the diamond and/or diamondlike carbon (diamond-based coating layer) for each sampling length of 10mum, the ratio of the sum A of the lengths of the recesses to the sum B of the lengths of protrusions is controlled to 0.05-20 in the sampling length at the interface, and the protrusions are allowed to intrude into the diamond-based coating layer. |
