Mechanical properties of Nextel{trademark} 312 fiber-reinforced SiC matrix composites

Book · Thu Jun 01 04:00:00 EDT 1995

OSTI ID:55372

Vaidyanathan, K R ^[1]; Sankar, J; Kelkar, A D ^[2]; Weaver, B ^[3]

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1. Rutgers Univ., Piscataway, NJ (United States). Center for Ceramic Research
2. North Carolina A and T State Univ., Greensboro, NC (United States). Dept. of Mechanical Engineering
3. 3M Co., St. Paul, MN (United States). Ceramic Technology Center

Vapor phase synthesis is emerging as a method for the preparation of near final-shape, ceramic matrix composites for advanced structural applications. Oxide fiber-reinforced silicon carbide matrix composites are currently being developed for these applications. The mechanical properties of Nextel{trademark} 312 fiber reinforced SiC matrix composites fabricated employing the forced-flow, thermal gradient chemical vapor infiltration process (FCVI) were evaluated at room temperature in pure tension. The composites were fabricated with a 0.15 {mu}m pyrolytic carbon interface layer for improving the toughness of the composite system. Because of the available FCVI apparatus, only short length specimens (7--8 cm) could be fabricated. Room temperature tensile strengths were measured and compared to room temperature flexure strength results for the composite. Excellent toughness and composite behavior was obtained for the composite system. Fractography as well as possible factors responsible for the differences in tensile and flexural strengths for the composite system is presented in this paper.

• DOE Contract Number: AC05-84OR21400
• OSTI ID: 55372
• Report Number(s): CONF-9310328--; ISBN 1-56676-232-4
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM OXIDES
BORON OXIDES
CARBON
COMPOSITE MATERIALS
EXPERIMENTAL DATA
FRACTOGRAPHY
FRACTURE PROPERTIES
SAMPLE PREPARATION
SCANNING ELECTRON MICROSCOPY
SILICON CARBIDES
SILICON OXIDES
TENSILE PROPERTIES