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Proceedings Paper

Increasing the strength of sapphire by heat treatments
Author(s): Frederick Schmid; Keil A. Schmid; Chandra P. Khattak; Peter Duggan; Daniel C. Harris
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Paper 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.

Paper Details

Date Published: 26 July 1999
PDF: 8 pages
Proc. SPIE 3705, Window and Dome Technologies and Materials VI, (26 July 1999); doi: 10.1117/12.354639
Show Author Affiliations
Frederick Schmid, Crystal Systems, Inc. (United States)
Keil A. Schmid, Crystal Systems, Inc. (United States)
Chandra P. Khattak, Crystal Systems, Inc. (United States)
Peter Duggan, Crystal Systems, Inc. (United States)
Daniel C. Harris, Naval Air Warfare Ctr. (United States)


Published in SPIE Proceedings Vol. 3705:
Window and Dome Technologies and Materials VI
Randal W. Tustison, Editor(s)

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