Metal-Impregnated Carbons

Abstract

Metal-Impregnated CarbonsMetal compounds have been incorporated into a rayon-based Reinforced Pyrolytic Graphite and subsequently reduced to the metal or converted to the carbide to increase oxidation resistance. The impregnants used were HiZr0(S04)2•3 20, TaCU, HfCh, ZrH2/ boron, and silicon. None reduced flexural strength significantly. The first four impregnants increased resistance to burning, whereas the last five retarded weight loss in static oxidation tests at 1 850°F.