Effect of oxidation on the mechanical properties of Nextel{trademark}312/BN/Blackglas{trademark} composites

Book · Sun Oct 01 04:00:00 EDT 1995

OSTI ID:100584

Vaidyanathan, K R; Cannon, W G; Danforth, S C ^[1]; Tobin, A G ^[2]; Holmes, J W ^[3]

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1. Rutgers, The State Univ. of New Jersey, Piscataway, NJ (United States). Center for Ceramic Research
2. Grumman Aerospace and Electronics, Bethpage, NY (United States)
3. Univ. of Michigan, Ann Arbor, MI (United States). Dept. of Mechanical Engineering

Preceramic polymers are attractive precursor materials for the production of low cost continuous fiber reinforced ceramic composites (CFCC) into near net shape components. Currently, CFCC components based upon a Blackglas{trademark} matrix reinforced with Nextel{trademark}312 fibers with a BN rich surface layer are being investigated for gas turbine engine applications. The effects of oxidation on tensile and bend properties were investigated after exposure to flowing air at 600 C for 20--1,000h. A significant reduction in the tensile properties accompanied by increases in fiber pull-out was observed after oxidation for 96 hours. After 500 hours oxidation, strength decreased by 50% relative to as-prepared composites. These results indicate that oxidation beyond 200 hours may be embrittling the composite.

• OSTI ID: 100584
• Report Number(s): CONF-941144--; ISBN 1-55899-266-9
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BORON NITRIDES
CHEMICAL REACTIONS
COMPOSITE MATERIALS
EXPERIMENTAL DATA
FLEXURAL STRENGTH
FRACTURE PROPERTIES
HEAT TREATMENTS
INTERFACES
MECHANICAL PROPERTIES
OXIDATION
SAMPLE PREPARATION
SCANNING ELECTRON MICROSCOPY
SILICATES
SILICON CARBIDES
TENSILE PROPERTIES
YOUNG MODULUS