High-temperature mechanical characterization of single-crystal sapphire using laser-based ultrasonics

David W. Blodgett; Kevin C. Baldwin

doi:10.1117/12.354641

26 July 1999 High-temperature mechanical characterization of single-crystal sapphire using laser-based ultrasonics

David W. Blodgett, Kevin C. Baldwin

Proceedings Volume 3705, Window and Dome Technologies and Materials VI; (1999) https://doi.org/10.1117/12.354641
Event: AeroSense '99, 1999, Orlando, FL, United States

Abstract

Of current interest in the missile community is the high- temperature mechanical behavior of single-crystal sapphire. For endo-atmospheric IR transparent windows, single crystal sapphire is the material of choice. However, sapphire has been found to undergo a significant change in the mechanical properties, leading to a potential fracture of the window at the high temperatures encountered during typical flight conditions. A critical figure of merit used in considering a material's usefulness as a dome material is its thermal shock resistance.

Citation Download Citation

David W. Blodgett and Kevin C. Baldwin "High-temperature mechanical characterization of single-crystal sapphire using laser-based ultrasonics", Proc. SPIE 3705, Window and Dome Technologies and Materials VI, (26 July 1999); https://doi.org/10.1117/12.354641

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