Solid lubricating compacts of tungsten diselenide-gallium alloys are currently under development for use as self-lubricating members in high speed-high temperature ball bearing systems. The material is of considerable interest due to the fact that it resists oxidation at temperatures three times higher than pure tungsten diselenide. This paper discusses initial studies of the physical and chemical changes that occur in these compacts during a heal-treating cycle required in their fabrication. Speculations regarding the mechanism responsible for their oxidation resistance are presented.Presented as an American Society of Lubrication Engineers paper at the Lubrication Conference held in Chicago, Illinois, October 17–19, 1967.