Microstructure Of WCIC Coatings Deposited On Steel Substrates.
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J.T.M. De Hosson & N.J.M. Carvalho
Microstructure of WC/C coatings deposited on steel substrates J.Th.M. De Hosson and N.J.M. Carvalho Department of Applied Physics, Materials Science Center and Netherlands Institute for Metals Research, University ofGroningen, The Netherlands. Abstract 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 €2% in mixed Ar^H] 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 amo