Nanostructured WC-Co Coatings from Different Feedstock Powders

Abstract:

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Nanostructured WC-Co coatings have been manufactured by high velocity oxyfuel (HVOF) spraying using commercially available nanocomposite powders. The effect of feedstock powder characteristics on coating microstructure has been investigated. A significant loss of carbon occurred during HVOF spraying, which was much greater for a porous, irregular powder than for a dense, spherical powder. The decarburization promoted the formation of several additional phases in the coating, including W2C, W and CoxWxC. The microstructural differences in each coating arose from the different extent of feedstock powder melting because of initial powder morphology.

Info:

Periodical:

Materials Science Forum (Volumes 449-452)

Edited by:

S.-G. Kang and T. Kobayashi

Pages:

1293-1296

DOI:

10.4028/www.scientific.net/MSF.449-452.1293

Citation:

K. H. Baik et al., "Nanostructured WC-Co Coatings from Different Feedstock Powders", Materials Science Forum, Vols. 449-452, pp. 1293-1296, 2004

Online since:

March 2004

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Price:

$35.00

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