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Pip Processing, Microstructure and Properties of Si34N Fiber and Al2O3 Fiber Reinforced Silicon Nitride

Published online by Cambridge University Press:  15 February 2011

Stuart T. Schwab ,
Richard A. Page ,
David L. Davidson  and
Renee C. Graef
Stuart T. Schwab
Affiliation:
Southwest Research Institute, San Antonio, Texas 78238-5166
Richard A. Page
Affiliation:
Southwest Research Institute, San Antonio, Texas 78238-5166
David L. Davidson
Affiliation:
Southwest Research Institute, San Antonio, Texas 78238-5166
Renee C. Graef
Affiliation:
Southwest Research Institute, San Antonio, Texas 78238-5166
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Abstract

Polymer infiltration/pyrolysis (PIP) processing has the potential to become an affordable means of manufacturing continuous fiber-reinforced ceramic-matrix components. The PIP method is very similar to the well-known polymer-matrix and carbon-carbon composite manufacturing techniques, the major difference being the use of a preceramic polymer in place of the organic polymer or carbon precursor. To date, the majority of research in the field of preceramic polymers has centered on precursors to silicon carbide (SiC). The Southwest Research Institute (SwRI) has focused on the development of polymeric precursors to silicon nitride (Si3N4) because its high-temperature strength, resistance to oxidation, and other properties make it an attractive candidate for many advanced high-temperature structural applications. PIP Si3N4 composites with NICALON SiC fiber reinforcement have exhibited good fracture toughness (KIC ∼ 16MPa·m1/ 2). We report here processing, microstructure and preliminary mechanical properties of two new PIP Si3N4 composites. One is reinforced with Tonen Si3N4 fiber (plain weave) while the other is reinforced with ALMAX Al2O3 fiber (8 Harness satin weave).

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 365: Symposium M – Ceramic Matrix Composites–Advanced High-Temperature Structural Materials , 1994 , 107
Copyright
Copyright © Materials Research Society 1995

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