Effects of counterface material and UV radiation on the tribological performance of a UHMWPE/CNT nanocomposite coating on steel substrates

► Ball material and UV radiation effects on the tribological performance of a UHMWPE/CNT coating. ► Brass ball exhibited lowest coefficient of friction of ∼ 0.09 against the coating. UV radiation exposure for 300 h did not alter the tribological performance of the coating. ► An overcoat of PFPE further reduced the coefficient of friction to ∼0.05.