Gonczy, S. T. and Oba, K. and Faber, K. T. (1998) Strength and stability studies on mini-tow ceramic composites made with nitrided Nextel (TM) 312 fibers and silicon oxycarbide. In: 22nd Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: A. Ceramic Engineering and Science Proceedings. Vol.19. No.19-3. American Ceramic Society , Westerville, OH, pp. 147-154. ISBN 9780470375587. https://resolver.caltech.edu/CaltechAUTHORS:20140908-181325422
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Abstract
Nitridation of Nextel(TM) 312 alumino-borosilicate fibers produces a boron-nitride-rich surface layer which acts as a debond layer in ceramic composites. This interface-fiber system offers a low cost alternative to CVD deposition of coatings on alumina and silicon carbide fibers. Ceramic fiber composites were made with 6 infiltration/pyrolysis cycles of a nitrided multifilament Nextel(TM) 312 mini-tow, using Blackglas(TM) resin to produce a silicon oxycarbide matrix. In the as-prepared condition the Nextel-Blackglas(TM) mini-tow composites had a mean tensile breaking load of 53 Newtons, a coefficient of variation of 26%, and limited fiber pull-out. The Nextel(TM) composites were then heat-treated in air at 600°, 800°, and 1000°C to determine oxidation stability. After 600°C oxidation for 200 hours, the Blackglas(TM) Nextel(TM) composites retained 75% of the as-prepared tensile break load with a fibrous fracture surface. Oxidation for 24 hours at 1000°C and for 100 hours at 800°C reduced the retained tensile breaking load by 47% and 66% respectively, showing reduced strain-to-failure and distinct embrittlement of the composite.
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| Additional Information: | Copyright © 1988 The American Ceramic Society. The authors would like to thank Dr. Jack Sikonia of AlliedSignal for the contribution of Nextel™ tow and Blackglas™ resin. | |||||||||
| Series Name: | Ceramic Engineering and Science Proceedings | |||||||||
| Issue or Number: | 19-3 | |||||||||
| DOI: | 10.1002/9780470294482.ch17 | |||||||||
| Record Number: | CaltechAUTHORS:20140908-181325422 | |||||||||
| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20140908-181325422 | |||||||||
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | |||||||||
| ID Code: | 49410 | |||||||||
| Collection: | CaltechAUTHORS | |||||||||
| Deposited By: | George Porter | |||||||||
| Deposited On: | 12 Sep 2014 21:44 | |||||||||
| Last Modified: | 10 Nov 2021 18:43 |
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