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Proceedings Paper

Enhancement in aerothermal shock survivability of lanthana-strengthened yttria windows and domes
Author(s): George C. Wei; Marina R. Pascucci; E. A. Trickett; S. Natansohn; William H. Rhodes
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Paper Abstract

Experiments aimed at improving the physical properties of transparent polycrystalline lanthanastrengthened yttria (LSY) infrared windows and domes were conducted. The objective was to enhance the thermal shock resistance for aggressive aerothermal environments. The approach included improving the average equibiaxial flexure strength, Weibull modulus, and other relevant physical properties. Initial results of an extensive study on polishing and post-fabrication treatment along with improved powder processing showed an -30% strength improvement without sacrifice in optical properties, leading to an appreciable increase in the calculated survivability. LSY with a low lanthana content significantly enhanced predicted survivability.

Paper Details

Date Published: 1 October 1990
PDF: 15 pages
Proc. SPIE 1326, Window and Dome Technologies and Materials II, (1 October 1990); doi: 10.1117/12.22479
Show Author Affiliations
George C. Wei, GTE Labs. Inc. (United States)
Marina R. Pascucci, GTE Labs. Inc. (United States)
E. A. Trickett, GTE Labs. Inc. (United States)
S. Natansohn, GTE Labs. Inc. (United States)
William H. Rhodes, GTE Labs. Inc. (United States)

Published in SPIE Proceedings Vol. 1326:
Window and Dome Technologies and Materials II
Paul Klocek, Editor(s)

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