High-temperature properties of a silicon nitride-intermetallic silicide composite

Conference · Tue Oct 01 00:00:00 EDT 1991 · Ceramic Engineering and Science Proceedings; (United States)

OSTI ID:5944500

Matsumoto, R L.K.; Weaver, G G

Ceramic composites composed of a silicon nitride matrix containing a dispersed silicide phase have been fabricated. While many silicides are brittle at room temperature, they become ductile at high temperatures as they undergo a brittle-to-ductile transition. In contrast to composites having silicides as the matrix phase, the material examined contains dispersed cobalt silicide particulates and has room temperature toughness of 10 MPa sq rt m. The toughness increases to 12 MPa sq rt m at 800 C. When the brittle-to-ductile transition temperature is exceeded, the toughness at 1100 C drops to 6 MPa sq rt m. 13 refs.

• OSTI ID: 5944500
• Report Number(s): CONF-910162-; CODEN: CESPD
• Journal Information: Ceramic Engineering and Science Proceedings; (United States), Vol. 12; Conference: 15. annual conference on composites and advanced ceramics, Cocoa Beach, FL (United States), 13-16 Jan 1991; ISSN 0196-6219
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
SILICIDES
MECHANICAL PROPERTIES
SILICON NITRIDES
AMBIENT TEMPERATURE
BRITTLE-DUCTILE TRANSITIONS
BRITTLENESS
COBALT COMPOUNDS
COMPOSITE MATERIALS
DUCTILITY
FRACTURE PROPERTIES
HIGH TEMPERATURE
PARTICULATES
TRANSITION TEMPERATURE
MATERIALS
NITRIDES
NITROGEN COMPOUNDS
PARTICLES
PHYSICAL PROPERTIES
PNICTIDES
SILICON COMPOUNDS
TENSILE PROPERTIES
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
360603* - Materials- Properties