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Effect of Oxidation on the Mechanical Properties of Nextel™ 312/BN/Blackglas™ Composites

Published online by Cambridge University Press:  15 February 2011

K. Ranji Vaidyanathan ,
W. Roger Cannon ,
Stephen C. Danforth ,
Albert G. Tobin  and
John W. Holmes
K. Ranji Vaidyanathan
Affiliation:
Center for Ceramic Research, Rutgers University, Piscataway, NJ 08855-0909
W. Roger Cannon
Affiliation:
Center for Ceramic Research, Rutgers University, Piscataway, NJ 08855-0909
Stephen C. Danforth
Affiliation:
Center for Ceramic Research, Rutgers University, Piscataway, NJ 08855-0909
Albert G. Tobin
Affiliation:
Grumman Aerospace & Electronics, Bethpage, NY 11714
John W. Holmes
Affiliation:
Department of Mechanical Engineering, University of Michigan, Ann Arbor, MI 48105
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Abstract

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™ matrix reinforced with Nextel™ 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 20–1000h. 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.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 365: Symposium M – Ceramic Matrix Composites–Advanced High-Temperature Structural Materials , 1994 , 429
Copyright
Copyright © Materials Research Society 1995

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