| 摘要 |
<p>PURPOSE: To enhance the adhesive power of a diamond film by forming rugged ness sufficiently exhibiting an anchor effect on the surface of a sintered hard alloy. CONSTITUTION: Ceramic particles of carbides of groups IVa, Va and VIa metals in Periodic Table silicon carbide or alumina, etc., for example, ceramic particles 12 of TiC having a particle size of 1 to 100μm are embedded into the surface of a sintered hard alloy base material 10 of a tungsten carbide base and, thereafter, this surface is subjected to an electrolytic etching treatment using a mineral acid as an electrolytic liquid to form the ruggedness consisting of triangular pyramidal projections 14. The diamond film 16 is formed by a CVD method on the surface of such sintered hard alloy base material 10. Since the ceramic particles 12 act as a mask. the triangular pyramidal projections 14 are formed uniformly at a high density, by which the sufficient anchor effect at the time of forming the diamond film is obtd.</p> |
