Novel method for adherent diamond coatings on cemented carbide substrates

Dong Gu Lee, James M. Fitz-Gerald, Rajiv K. Singh

Research output: Contribution to journalArticlepeer-review

23 Scopus citations

Abstract

Adhesion of diamond films on cemented carbide substrates is a critical issue due to its large thermal expansion mismatch. This large difference in thermal expansion results in the generation of very high stresses in the coating that may lead to delamination, cracking, or other deleterious effects. A method to increase the adherence of diamond coatings on cemented carbide substrates is reported, based on a substrate-modification process that creates a three-dimensional thermally and compositionally graded interface. Indentation tests on diamond coated tungsten carbide substrate showed that the adhesion of diamond films significantly improved with increasing the surface roughness of cemented carbides.

Original languageEnglish
Pages (from-to)187-191
Number of pages5
JournalSurface and Coatings Technology
Volume100-101
Issue number1-3
DOIs
StatePublished - Mar 1998
Externally publishedYes

Funding

The authors would like to acknowledge the financial support of the University of Florida, National Science Foundation, and the Engineering Particle Science and Technology Florida, NSF Grant no. 94-02989.

FundersFunder number
Engineering Particle Science and Technology Florida
National Science
National Science Foundation94-02989
University of Florida

    Keywords

    • Adhesion
    • Chemical vapor deposition
    • Diamond films
    • Laser
    • Tool

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