Thermodynamic Discussion of Various Materials Modified by Friction Reforming for Adaptation to a Marine Environment

Abstract

  Surface modification of several materials was conducted to improve the tribological properties and corrosion resistance to develop friction materials for marine applications. The surface modification method included various processes, the most important of which was the friction reforming process with powder. The modified layer of previously modified materials with superior properties was examined in terms of thermodynamics. Modified titanium and modified chrome-molybdenum were examined as specimen materials. Electron probe microanalysis (EPMA) and thermodynamic database software were used for the examination. The results indicated the formation of chrome oxides, a lack of Cr and diffusion of Mo, which were considered to be due to a higher affinity between Cr and O.