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    Acid pretreatment of WC-Co prior to CVD diamond coating

    Access Status
    Fulltext not available
    Authors
    Noordin, M.
    Noor Adila, A.
    Izman, S.
    Kurniawan, Denni
    Date
    2012
    Type
    Conference Paper
    
    Metadata
    Show full item record
    Citation
    Noordin, M. and Noor Adila, A. and Izman, S. and Kurniawan, D. 2012. Acid pretreatment of WC-Co prior to CVD diamond coating, pp. 626-629.
    Source Title
    Advanced Materials Research
    DOI
    10.4028/www.scientific.net/AMR.576.626
    ISBN
    9783037854983
    School
    Curtin Malaysia
    URI
    http://hdl.handle.net/20.500.11937/67115
    Collection
    • Curtin Research Publications
    Abstract

    Pretreatment on tungsten carbide (WC-Co) surface is critical for obtaining perfectly adherent diamond coatings by chemical vapor deposition (CVD). The carbide surface should have high roughness to facilitate diamond nucleation and adhesion. The presence of cobalt-common binder for tungsten carbide-on the surface to be coated should be made minimum since it has negative influence on the diamond deposition process. In this study, surface pretreatment on tungsten carbide using sulfuric acid was evaluated in terms of the resulted cobalt removal and the surface roughening. The variables included were acid concentration, reaction temperature, and reaction time. The resulted surface roughness was 29% higher than initial, averaged at 1.07 µm. The acid pretreatment was also found effective in eliminating surface cobalt. © (2012) Trans Tech Publications, Switzerland.

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