MoSi{sub 2}-based sandwich composite made by tape casting

Journal Article · Wed Nov 01 04:00:00 EST 1995 · Journal of the American Ceramic Society

DOI:https://doi.org/10.1111/j.1151-2916.1995.tb09071.x· OSTI ID:136495

Tuffe, S; Wilkinson, D S ^[1]

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1. McMaster Univ., Hamilton, Ontario (Canada). Dept. of Materials Science and Engineering

The mechanical properties of a novel laminar composite made by tape casting have been studied. The composite consists of three layers in which an inner core of pure molybdenum disilicide (MoSi{sub 2}) is sandwiched between two layers of MoSi{sub 2} reinforced with alumina platelets. Monolithic MoSi{sub 2} exhibits poor room-temperature strength and a brittle indentation strength response, indicative of the absence of R-curve behavior. A 25 vol% Al{sub 2}O{sub 3} platelet reinforced MoSi{sub 2}, however, shows increased strength and strong R-curve behavior. The flexural behavior of the sandwich composite (both strength and toughness) is dominated by the properties of the outer layer, so long as the thickness of this layer exceeds a critical value. A model has been developed which successfully predicts the critical thickness required.

• Sponsoring Organization: USDOE
• OSTI ID: 136495
• Journal Information: Journal of the American Ceramic Society, Journal Name: Journal of the American Ceramic Society Journal Issue: 11 Vol. 78; ISSN 0002-7820; ISSN JACTAW
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM OXIDES
BINDERS
CASTING
COMPOSITE MATERIALS
FLEXURAL STRENGTH
FRACTURE MECHANICS
FRACTURE PROPERTIES
INTERMETALLIC COMPOUNDS
LAYERS
MATHEMATICAL MODELS
MECHANICAL PROPERTIES
MOLYBDENUM SILICIDES
SOLVENTS
THERMAL EXPANSION
VISCOSITY