MoSi{sub 2} - {beta}{prime} SiAlON particulate ceramic composite

Conference · Mon Dec 30 23:00:00 EST 1996

OSTI ID:567537

Huang, C M; Yuh, C Y; Farooque, M ^[1]

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1. Energy Research Corp., Danbury, CT (United States); and others

Particulate ceramic composites composed of a combustion synthesized {beta}{prime} SiAlON matrix and dispersed MoSi{sub 2} particles were hot pressed at 1600{degrees}C in a nitrogen atmosphere. The physical and mechanical properties of the composites containing 30 vol% MoSi{sub 2} were evaluated. The average four-point bend strength, fracture toughness, and Vickers hardness (HV) of the composites were {approximately}500 MPa, 4 MPa{radical}m and 12 GPa, respectively. Fracture toughness of the combustion synthesized {beta} SiAlON (2.5 MPa{radical}m) was enhanced by the added MoSi{sub 2} particles. The composites showed improved electric conductivity and oxidation resistance over the monolithic {beta}` SiAlON.

• OSTI ID: 567537
• Report Number(s): CONF-960106--
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM OXIDES
COMPOSITE MATERIALS
CORROSION RESISTANCE
ELECTRIC CONDUCTIVITY
FRACTURE PROPERTIES
MOLYBDENUM SILICIDES
SILICON NITRIDES
VICKERS HARDNESS