Abstract
(CrNbTiAlV)N-x high-entropy nitride films were prepared using magnetron sputtering method. The effect of substrate bias on the microstructure, mechanical, electrochemical, and tribo-corrosion properties of the films was systematically studied. The results show that the microstructure of the film changes from a loose columnar structure to a compact nanocrystal structure with the increase of substrate bias, accompanied by the preferred orientation from (200) to (111). The hardness, modulus and residual stress are positively correlated with increased substrate bias, reaching the maximum values of 35.3 GPa, 353.7 GPa and-6.41 GPa at-156 V, respectively. Under static corrosion, the film deposited under-126 V has the most positive E(corr )of-0.05 V and the lowest i(corr) of 0.013 mu A/cm(2). Under tribo-corrosion, the films deposited at-96 V and-126 V show the lowest coefficient of friction (-0.2) and wear rate (-4.4 x 10(-7 )mm(3).N-1.m(-1)), respectively. The evolution of microstructure and mechanical property are the main factors affecting the tribo-corrosion behavior of (CrNbTiAlV)N-x films.
NSTL
Elsevier