3 May 2017 Slow crack growth study of polycrystalline alumina and multispectral zinc sulfide
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Abstract
Samples of fine-grain, transparent polycrystalline alumina (CeraNova Corp) and multispectral zinc sulfide (Cleartran) were tested to determine mechanical strength and slow crack growth parameters. Mechanical strength measurements of coupons were fit to a Weibull equation that describes the material strength and its distribution. Slow crack growth parameters were calculated using the procedure set forth by Weiderhorn.1 This paper describes the derivation of Weibull and slow crack growth parameters from strength measurements over a range of stress rates and how these parameters are used to predict window lifetime under stress. Proof testing is employed to ensure that a window begins its life with a known, minimum strength.
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Lee R. Cambrea, Lee R. Cambrea, Daniel C. Harris, Daniel C. Harris, Steven M. Goodrich, Steven M. Goodrich, Mark Parish, Mark Parish, Marina R. Pascucci, Marina R. Pascucci, } "Slow crack growth study of polycrystalline alumina and multispectral zinc sulfide", Proc. SPIE 10179, Window and Dome Technologies and Materials XV, 101790A (3 May 2017); doi: 10.1117/12.2261102; https://doi.org/10.1117/12.2261102
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