Silicon oxycarbide reaction with glass matrix compositions
Conference
·
OSTI ID:96586
- Pennsylvania State Univ., Univ. Park, PA (United States)
A residual silicon oxycarbide phase has been observed in Nicalon and other polymer derived SiC fibers. This phase is believed to control the thermal stability and interface reaction of these fibers in ceramic composites. In this study, silicon oxycarbide was synthesized in bulk to study, directly, its reaction with a barium magnesium aluminosilicate glass (BMAS) using reaction couples. A strong relationship between decomposition of the silicon oxycarbide and the transport of glass (matrix) constituents (especially Al) was observed. In many cases, a carbon rich layer was observed to form within the decomposed surface of the oxycarbide at the oxycarbide/glass interface. The absence of a reaction layer at the interface of SiC and BMAS glass indicates that it is the oxycarbide phase in Nicalon fiber that proves the carbon-rich interphase.
- OSTI ID:
- 96586
- Report Number(s):
- CONF-940416--
- Country of Publication:
- United States
- Language:
- English
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