Adhesion of diamond coatings on cemented carbides

• Published in: Thin solid films Vol. 270; no. 1; pp. 184 - 188
• Main Authors: Nesládek, M., Vandierendonck, K., Quaeyhaegens, C., Kerkhofs, M., Stals, L.M.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Lausanne Elsevier B.V 01.12.1995; Elsevier Science
• Subjects: Adhesion; Carbides; Coatings; Condensed matter: structure, mechanical and thermal properties; Diamond; Exact sciences and technology; Mechanical and acoustical properties; Physical properties of thin films, nonelectronic; Physics; Surfaces and interfaces; thin films and whiskers (structure and nonelectronic properties); Diamond; Coatings; Adhesion; Carbides; Stresses; Synthetic diamond; Diamonds; Roughness; Mechanical properties; Experimental study; Diamond structure; Surface states; Operating conditions; Thin films; Interfaces; CVD; Cemented carbides; SEM
• ISSN: 0040-6090; 1879-2731
• DOI: 10.1016/0040-6090(95)06914-3

Precise quantification of the adhesion of diamond coatings on cemented carbide (WC-Co) inserts is important for industrial applications. Adhesion is strongly influenced by the surface roughness, surface reactivity, catalytic effect of Co during diamond chemical vapour deposition (CVD) and by stresses developed in the film and at the bonding interface. In this work we investigated the adhesion of diamond coatings on WC-Co by using Rockwell-C indentation. Various surface modifications were studied: Co leaching; replacement of Co by Cu; WC-Co decarburization and deposition of Ti intermediate layer prior to diamond CVD. Turning tests with diamond coated inserts for machining of Al alloy were carried out.