Study of TiN Thick Coatings Produced by Gas Tunnel Type Plasma Reactive Spraying

摘要

The titanium nitride (TiN) sprayed coatings of 100 —200 μm thickness can be obtained in short times of 10s and produced by means of gas tunnel type plasma reactive spraying. In this paper, in order to study on the properties of TiN sprayed coatings, the cross-section of the TiN coating was observed by optical microscope and the structure of TiN coating was discussed. Vickers hardness of TiN coatings was measured when the spraying distance was L=60mm and L=70mm respectively. The relation between the spraying conditions L and Vickers hardness Hv of TiN coating was clarified. The adhesive strength of the TiN coating and wear weight of the coating were also measured and discussed. The structure of the TiN sprayed coating was investigated by X-ray diffraction (XRD) under various spraying conditions.