Structure and mechanical behavior evaluation of CVD multilayer coatings deposited on Ti(C,N)-based cermets

Evaluating the static and dynamic properties of different multilayer coatings on cermet is helpful to guide the coating design of cermet tools. The radar chart method is used to systematically evaluate the static and dynamic performance of the three multilayer coatings. The results show that the presence or absence of the Al2O3 coating in the coating system will affect the friction and cutting properties of the coating-substrate system. In addition, the growth texture of each layer of coating will also affect the performance of the coating-substrate system. The static properties of TiN/TiCN/α-Al2O3/TiN (A1) coating are better than TiN/TiCN/TiC/TiN (A0) and TiN/TiCN/κ-Al2O3/TiN (A2). Compared with A0 and A2, the morphology of the A1 coating has larger undulations and the largest roughness. However, the average friction coefficient of A1 is the smallest at 25 °C. Especially at 750 °C, the particle size of the coating surface will affect the friction performance. The order of the friction coefficient of three multilayer coatings at 25 °C is A1