Patent ID: 6322889
Filing Date: 2001-11-27
Classification: C04B,Y10T

Abstract:
A ceramic matrix composite comprising:a) a non-oxide ceramic fiber core;b) at least a first oxidation-resistant interface coating on said ceramic fiber core;c) at least a second interface coating on said at least a first oxidative-resistant interface coating;d) at least a third oxidation-resistant interface coating on said at least a second interface coating, said at least a second interface coating is a compound having a coefficient of thermal expansion greater than at least one of said at least a first oxidation-resistant interface coating and said at least a third oxidation-resistant interface coating;e) a ceramic matrix shell on said at least third oxidation-resistant interface coating such that matrix crack deflection is provided within said at least a second interface coating or between any two of said at least a first, second or third interface coatings.