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Meeting Materials Science & Technology 2019
Symposium Ceramic and Crystal Materials for Optics and Photonics
Presentation Title Transparent Ceramic for Extreme Environment
Author(s) Woohong (Rick) Kim, Shyam Bayya, Guillermo Villalobos, Michael Hunt, Fritz Miklos, Bryan Sadowski, Jasbinder Sanghera
On-Site Speaker (Planned) Woohong (Rick) Kim
Abstract Scope Cubic β-SiC is of great interest for various extreme applications such as hypersonic and supersonic windows and domes due to its high strength, high thermal shock resistance, and good vis-IR transparency. In addition, its low density is advantageous for various applications where weight savings are critical. However, the synthesis of pure β-SiC powder is very difficult and most of commercial powders of β-SiC contain phase, chemical, and physical impurities. The sintered samples become opaque due to the scattering resulting from these impurities. This paper discusses the synthesis and optical/physical properties of phase pure β-SiC powder using unique two step sol-gel method. Sintering behavior of the powder as well as various commercial powders is also reported.


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