Accession Number : AD0743510

Title :   The Si3N4-SiC Composite System: Effect of Microstructure on Strength.

Descriptive Note : Interim technical rept. no. 8 Feb 70-Feb 71,

Corporate Author : WESTINGHOUSE RESEARCH LABS PITTSBURGH PA MATERIAL SCIENCES DEPT

Personal Author(s) : Lange,F. F.

Report Date : 15 MAY 1972

Pagination or Media Count : 52

Abstract : The Si3N4-SiC composite system was investigated to obtain a better understanding of the effect of microstructure on the three strength controlling factors, viz., fracture energy, elastic modulus and crack size. Three different average particle size dispersions (5 micrometers, 9 micrometers and 32 micrometers) of silicon carbide were used to form three composite series within this system. Within each series, composites were formed containing 0.10, 0.20, 0.30 and 0.40 volume fractions of the dispersed silicon carbide phase. These composites were fabricated by hot-pressing. (Author)

Descriptors :   (*COMPOSITE MATERIALS, SILICON COMPOUNDS), NITRIDES, SILICON CARBIDES, MICROSTRUCTURE, MECHANICAL PROPERTIES, CERAMIC MATERIALS, PARTICLE SIZE, THERMAL CONDUCTIVITY

Subject Categories : Laminates and Composite Materials

Distribution Statement : APPROVED FOR PUBLIC RELEASE