RE: wc/co/cr coating
Hi,
HVOF coatings of WC-Co can form glassy phase and more so with the addition of third element like Cr.In such cases the coating surface would be brittle.Thinner coatings in the edges are more prone to glassy phase formation due to higher cooling rate..The heat treatment of the coating can reconvert the the glassy phase into crystalline phase.For further details please check in my book on 'Advanced Thermally Assisted Surface Engineering Process' Kluwer Academic Publishings,MA,USA, now Springer.
ram chattopadhyay
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