WC-Co coating was prepared by HVOF process on the carbon-fibre/PMR-15 composite substrate on which Kevlar-49 was attached. The result showed the uneven surface of Kevlar-49 contributed to the deposition of WC-Co powders, thus a dense coating is acquired. After undergoing 300 thermal shock circles from room temperature to 260 ℃,no obvious spallation of coating was observed and the extension of crack in the original coating was retarded because Kevlar-49 has the function of relaxing thermal stresses.
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