Microstructure of WC/C coatings deposited on steel substrates

J.T.M. de Hosson, N.J.M. Carvalho

OnderzoeksoutputAcademicpeer review

Samenvatting

Electron microscopy, including scanning (SEM), transmission (TEM) and high-resolution (HRTEM) were employed to characterise slightly different tungsten carbide/carbon coatings deposited onto steel substrates. Complementary techniques, such as X-ray diffraction (XRD), Auger electron spectroscopy (AES) and energy filtered TEM (GIF) were also used. The coatings were deposited by magnetron sputtering of pure WC and Cr targets in a plasma decomposition of C2H2 in mixed Ar-C2H2 discharges. The coatings are made up of a chromium interlayer, a coarse WC/C intermultilayer, a WC layer, and the WC/C multilayer. The chromium interlayer has a body centred cubic phase and a dense columnar structure, while the remaining coating is truly amorphous, with the exception of polycrystalline particles and clusters that are present within some layers. Crystalline particles and clusters were identified as having the cubic beta -WC1-x phase. Defects in the coatings were also found, due to substrate surface irregularities and to the growth structure of the chromium columns.

Originele taal-2English
TitelHost Publication
RedacteurenCA Brebbia
Plaats van productieSouthampton
UitgeverijWIT Press
Pagina's359-368
Aantal pagina's10
ISBN van geprinte versie1-85312-873-2
StatusPublished - 2001
Evenement5th International Conference on Computer Methods and Experimental Measurements for Surface Treatment Effects - , Spain
Duur: 20-jun-200122-jun-2001

Publicatie series

NaamCOMPUTATIONAL AND EXPERIMENTAL METHODS
UitgeverijWIT PRESS
Volume6
ISSN van geprinte versie1466-7266

Other

Other5th International Conference on Computer Methods and Experimental Measurements for Surface Treatment Effects
Land/RegioSpain
Periode20/06/200122/06/2001

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