INTERACTION BETWEEN SILICON-CARBIDE AND A NICKEL-BASED SUPER-ALLOY AT ELEVATED-TEMPERATURES

A study has been made of the reaction of hot-pressed SiC and a nickel-based superalloy at temperatures between 700 and 1150° C. Under conditions of reduced oxygen pressure at the reaction interface, obtained by applying pressure to the couple, some degree of reaction was observed in both metal and ceramic at all temperatures studied. Preliminary studies utilizing the same techniques at 1000° C with a Si-SiC ceramic composite, Si3N4, MgO, Al2O3, and SiO2 also indicated some degree of reaction in the metal for all ceramics examined. © 1979 Chapman and Hall Ltd.