Self-Lubricating Composite Coating for High-Temperature Use

PS300 is a self-lubricating solid coating material for use in sliding contacts at temperatures up to 800°C. PS300 is a composite of metal-bonded chromium oxide with barium fluoride/calcium fluoride eutectic and silver as solid lubricant additives. The "PS" in the name of this and other self-lubricating, high-temperature composite materials that have been reported in NASA Tech Briefs signifies that the material is applied to a substrate by plasma spraying of a powder blend of its constituents.