Abstract
In the present work, hardness and elastic modulus of a titanium nitride coatings prepared on Ti6Al4V by powder immersion reaction-assisted coating (PIRAC) are tested and comparatively studied with a physical vapor deposition (PVD) TiN coating. Surface hardness of the PIRAC coatings is about 11[Formula: see text]GPa, much lower than that of PVD coating of 22[Formula: see text]GPa. The hardness distribution profile from surface to substrate of the PVD coatings is steeply decreased from [Formula: see text]22[Formula: see text]GPa to [Formula: see text]4.5[Formula: see text]GPa of the Ti6Al4V substrate. The PIRAC coatings show a gradually decreasing hardness distribution profile. Elastic modulus of the PVD coating is about 426[Formula: see text]GPa. The PIRAC coatings show adjustable elastic modulus. Elastic modulus of the PIRAC coatings prepared at 750[Formula: see text]C for 24[Formula: see text]h and that at 800[Formula: see text]C for 8[Formula: see text]h is about 234 and 293[Formula: see text]GPa, respectively.
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