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Microstructural characterization of a SiC Whisker-Reinforced HIPped Reaction-Bonded Si3N4

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Abstract

A SiC whisker reinforced HIPped RBSN material fabricated with a Y2O3 sintering aid was characterized using TEM. The matrix is > 90% β-Si3 N4 with a Y-Si-O-N glassy phase at the Si3 N4 grain boundaries and about the SiC whiskers. The SiC whisiers are heavily faulted and have a well defined core. Si3 N4 precipitates are observed in the core region after composite fabrication. A preliminary mechanism for the growth of the SiC whisker, based on the VLS mechanism is proposed.

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Authors and Affiliations

  1. Department of Material Science and Eng., Case Western Reserve University, 44106, Cleveland, Ohio, USA

    S. C. Farmer, P. Pirouz & A. H. Heuer

Authors
  1. S. C. Farmer
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  2. P. Pirouz
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  3. A. H. Heuer
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Farmer, S.C., Pirouz, P. & Heuer, A.H. Microstructural characterization of a SiC Whisker-Reinforced HIPped Reaction-Bonded Si3N4. MRS Online Proceedings Library 120, 169–174 (1988). https://doi.org/10.1557/PROC-120-169

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  • DOI: https://doi.org/10.1557/PROC-120-169

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