Effect of coatings on lifetime of composite dampers

Abstract A comprehensive study of the mechanical and tribological properties of the carbon composite material of coated and uncoated damping spacers was carried out. Indentation techniques, microscopy, friction tests at different scale levels were used in this study. Previously developed models were used to determine the mechanical properties of coatings. It is shown that the presence of the coating has small effect on the friction coefficient, and the wear rate for coated samples is lower than for uncoated ones. It is obtained that under high loads, which may randomly occur at contact, there is a probability of coating delamination. The influence of the coating thickness on the probability of delamination is calculated and analyzed.