In Situ and Ex Situ Analysis of the Reciprocating Sliding Wear Behavior of Cold Sprayed Crmncofeni Cantor Hea Coatings in Dry Air and Ambient Air Conditions

Abstract

This study examined and compared the tribological properties of a cold-sprayed CrMnCoFeNi high entropy alloy (Cantor alloy) coating under ambient and dry air conditions. Tribological testing was conducted using an in situ tribometer equipped with video microscopy, allowing real-time monitoring of the evolution of the sliding interfaces through a transparent sapphire counterface. This experimental setup provided the opportunity to observe phenomena that would otherwise remain concealed between the contacting bodies. The wear rate was 1.8±0.5×10−4 mm3/Nm in ambient air and 7.5±0.7×10−4 mm3/Nm in dry air. In situ tribometry allowed third body activities to be observed and correlated with the wear results.

Keywords: CrMnCoFeNi, high entropy alloy, in situ, cold spray