Effect of laser irradiation on adhesion strength of diamond films on WC-6wt%Co hard metal substrate

Conference · Sun Dec 31 04:00:00 EST 1995

OSTI ID:230042

Lu, F X; Li, C M; Wang, J J ^[1]

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1. Univ. of Science and Technology, Beijing (China); and others

Effect of laser irradiation pre-treatment on adhesion strength of diamond films on WC-6wt% Co hard metal substrate was studied. Adhesion strength of diamond films on the hard metal substrate were measured by the Scraper Test, and were compared to those deposited in identical conditions but the substrate were subjected to etching in acidic solution. It was found that at a film thickness of 2-6{mu}m, laser pre-treatment almost doubled the adhesion strength as compared to acid etching pre-treatment. Detailed SEM examinations confirmed the mechanisms suggested by the present authors in their earlier work that the improvement in adhesion strength by laser pre-treatment was due to the surface Co depletion and surface modification by the high power density laser beam.

• OSTI ID: 230042
• Report Number(s): CONF-950840--
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ADHESION
COBALT ALLOYS
CUTTING TOOLS
DIAMONDS
ETCHING
FILMS
IRRADIATION
MICROSTRUCTURE
RADIATION EFFECTS
SURFACE COATING
THICKNESS
TUNGSTEN CARBIDES