New Materials of Construction for Heat Engines in High Temperature Service

Abstract

The demand for materials that will withstand the high stresses in rapidly rotating parts of the gas turbines and jet propulsion engines for their efficient operation at a high gas temperature has resulted in the development of several ceramic materials for such applications.The study of their properties at elevated temperatures has provided encouraging data for the design of gas turbine blades. The ceramic materials retain their strength at elevated temp- eratures and many of them resist oxidation; they are, however, more susceptible to failure from thermal shock than the metallic alloys. Various compositions have recen-tly been studied to improve their resistance to thermal shock