Enhancing the wide temperature dry sliding tribological performance of nickle-alloy by adding MoS2/CaF2

Abstract

In this paper, the nickle-alloy matrix composites with different content of MoS2 (0, 5, 10, 15, 20 wt. %) and CaF2 (0, 5 wt. %) were fabricated by hot pressed sintering method and their frictional behavior was tested from 25 °C to 700 °C. Results showed that the testing temperature and solid lubricant content had significant effect on the frictional behaviors of the composites. For the materials with 10, 15, 20 wt. % MoS2, low friction coefficients of 0.16–0.3 and wear rates of (1.6–14.8) × 10−5 mm3 N−1 m−1 were observed as testing temperature up to 200 °C. The wear mechanisms were analyzed based on the morphologies and chemical composition of the worn surface.