In the present work, TiAlN coatings were deposited on Ti(C, N)-based cermet substrates by physical vapor deposition method. Emphasis was focused on the influence of grain size of cermet substrates on the microstructure, growth behavior, mechanical properties, adhesion strength and wear behavior of the coatings. The results show that finer Ti(C, N) grain size leads to higher nucleation density and lower growth rate of coatings, indicating the crystallite size of the TiAlN coatings decreases with decreasing Ti(C, N) grain size. Nanoindentation tests show that the coatings deposited on cermets of the finest grain size exhibit the highest hardness (H), elastic modulus (E), H/E and H³/E² of 34.5 GPa, 433.2 GPa, 0.080 and 0.22, respectively. The adhesion strength between coating and substrate is also enhanced with decreasing Ti(C, N) grain size by scratch test, which corresponds to the grain size and H/E and H³/E² of the coating. Besides, the lower surface roughness and better mechanical properties of the coating deposited on finer grained cermet contribute to the better wear resistance of the coating.

在目前的工作中，通过物理气相沉积法将TiAlN涂层沉积在基于Ti（C，N）的金属陶瓷基底上。重点集中在金属陶瓷基体的晶粒尺寸对涂层的微观结构，生长行为，机械性能，粘附强度和磨损行为的影响。结果表明，更细的Ti（C，N）晶粒尺寸导致较高的成核密度和较低的涂层生长速率，表明TiAlN涂层的晶粒尺寸随着Ti（C，N）晶粒尺寸的减小而减小。纳米压痕测试表明，沉积在粒度最细的金属陶瓷上的涂层表现出最高的硬度（H），弹性模量（E），H / E和H ³ / E ²分别为34.5 GPa，433.2 GPa，0.080和0.22。通过减小划痕试验的Ti（C，N）晶粒尺寸，涂层与基材之间的粘合强度也得以提高，这对应于涂层的晶粒尺寸以及H / E和H ³ / E ²。此外，沉积在细粒金属陶瓷上的涂层的较低的表面粗糙度和更好的机械性能有助于涂层的更好的耐磨性。