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Proceedings Paper

Development of transparent polycrystalline beta-silicon carbide
Author(s): Shyam S. Bayya; Guillermo R. Villalobos; Michael P. Hunt; Jasbinder S. Sanghera; Bryan M. Sadowski; Ishwar D. Aggarwal; Michael Cinibulk; Carmen Carney; Kristin Keller
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Paper Abstract

Transparent beta-SiC is of great interest because its high strength, low coefficient of thermal expansion, very high thermal conductivity, and cubic crystal structure give it a very high thermal shock resistance. A transparent, polycrystalline beta-SiC window will find applications in armor, hypersonic missiles, and thermal control for thin disc lasers. SiC is currently available as either small transparent vapor grown disks or larger opaque shapes. Neither of which are useful in window applications. We are developing sintering technology to enable transparent SiC ceramics. This involves developing procedures to make high purity powders and studying their densification behavior. We have been successful in demonstrating transparency in thin sections using Field Assisted Sintering Technology (FAST). This paper will discuss the reaction mechanisms in the formation of beta-SiC powder and its sintering behavior in producing transparent ceramics.

Paper Details

Date Published: 30 September 2013
PDF: 7 pages
Proc. SPIE 8837, Material Technologies and Applications to Optics, Structures, Components, and Sub-Systems, 88370S (30 September 2013); doi: 10.1117/12.2023954
Show Author Affiliations
Shyam S. Bayya, U.S. Naval Research Lab. (United States)
Guillermo R. Villalobos, U.S. Naval Research Lab. (United States)
Michael P. Hunt, University Research Foundation (United States)
Jasbinder S. Sanghera, U.S. Naval Research Lab. (United States)
Bryan M. Sadowski, Sotera Defense Solutions, Inc. (United States)
Ishwar D. Aggarwal, Sotera Defense Solutions, Inc. (United States)
Michael Cinibulk, Air Force Research Lab. (United States)
Carmen Carney, UES, Inc. (United States)
Kristin Keller, UES, Inc. (United States)

Published in SPIE Proceedings Vol. 8837:
Material Technologies and Applications to Optics, Structures, Components, and Sub-Systems
Joseph L. Robichaud; Matthias Krödel; William A. Goodman, Editor(s)

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