Research of TiN Coatings by Means of Gas Tunnel Type Plasma Reactive Spraying

摘要

The titanium nitride (TiN) sprayed coating with thickness of 100 - 200 μm could be obtained in a short time of 10s by means of gas tunnel type plasma reactive spraying. In the present paper, in order to investigate the properties of TiN sprayed coating, the cross-section of TiN coating was observed by an optical microscope and also the structure of TiN coating was discussed. Vickers hardness of TiN coatings was measured when the spraying distance was l=60 mm and l=70 mm. The relations between the spraying distance l and Vickers Hardness Hv on the cross-section of TiN sprayed coating was clarified. The adhesive strength of TiN coating was measured and discussed.