Increasing the strength of sapphire by heat treatments

Frederick Schmid; Keil A. Schmid; Chandra P. Khattak; Peter Duggan; Daniel C. Harris

doi:10.1117/12.354639

26 July 1999 Increasing the strength of sapphire by heat treatments

Frederick Schmid, Keil A. Schmid, Chandra P. Khattak, Peter Duggan, Daniel C. Harris

Proceedings Volume 3705, Window and Dome Technologies and Materials VI; (1999) https://doi.org/10.1117/12.354639
Event: AeroSense '99, 1999, Orlando, FL, United States

Abstract

Heat treatments of finished sapphire compression and biaxial flexure specimens increased sapphire's high temperature strength. Heat treatments of sapphire specimens at 1450 degrees C for 48 hours in an air atmosphere enriched with oxygen increased the compression strength by 60 percent and biaxial flexure strength at 600 degrees C by 45 percent over untreated samples.

Citation Download Citation

Frederick Schmid, Keil A. Schmid, Chandra P. Khattak, Peter Duggan, and Daniel C. Harris "Increasing the strength of sapphire by heat treatments", Proc. SPIE 3705, Window and Dome Technologies and Materials VI, (26 July 1999); https://doi.org/10.1117/12.354639

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