Growth of a well-adhering diamond coating on sintered tungsten

• Published in: Diamond and related materials Vol. 4; no. 8; pp. 1079 - 1087
• Main Authors: Shi, C.R., Avyigal, Y., Dirnfeld, S., Hoffman, A., Fayer, A., Kalish, R.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01.06.1995; Elsevier
• Subjects: Adhesion; Condensed matter: structure, mechanical and thermal properties; Cross-disciplinary physics: materials science; rheology; Diamond films; Exact sciences and technology; Materials science; Mechanical and acoustical properties; adhesion; Physics; Solid surfaces and solid-solid interfaces; Substrate preparation; Surface treatments; Surfaces and interfaces; thin films and whiskers (structure and nonelectronic properties); Tool coatings; Tool coatings; Adhesion; Substrate preparation; Diamond films; Synthetic mineral; Diamonds; Roughness; Surfaces; Surface treatments; Sintered materials; Crystal growth from vapors; Solid-solid interfaces; Experimental study; Coatings; Substrates; CVD; Nonmetals; Plasma etching; Pretreatment; Carburization
• ISSN: 0925-9635; 1879-0062
• DOI: 10.1016/0925-9635(95)00281-2

Continuous well-adhering high-quality diamond films have been grown on sintered tungsten with a NiFe binder. In order to obtain good adhesion special pre-growth treatment procedures were employed and their effect on growth and on film properties were studied. They include treatment in a hydrogen plasma, carburization in a mixture of H 2 and CH 4, hydrogen plasma etching at elevated temperatures, surface roughening and deposition at optimal conditions. Factors affecting the adhesion between the diamond film and the substrate were investigated.