Enhancement in aerothermal shock survivability of lanthana-strengthened yttria windows and domes

George C. Wei; Marina R. Pascucci; E. A. Trickett; S. Natansohn; William H. Rhodes

doi:10.1117/12.22479

1 October 1990 Enhancement in aerothermal shock survivability of lanthana-strengthened yttria windows and domes

George C. Wei, Marina R. Pascucci, E. A. Trickett, S. Natansohn, William H. Rhodes

Proceedings Volume 1326, Window and Dome Technologies and Materials II; (1990) https://doi.org/10.1117/12.22479
Event: 34th Annual International Technical Symposium on Optical and Optoelectronic Applied Science and Engineering, 1990, San Diego, CA, United States

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.

Citation Download Citation

George C. Wei, Marina R. Pascucci, E. A. Trickett, S. Natansohn, and William H. Rhodes "Enhancement in aerothermal shock survivability of lanthana-strengthened yttria windows and domes", Proc. SPIE 1326, Window and Dome Technologies and Materials II, (1 October 1990); https://doi.org/10.1117/12.22479

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