ZERODUR glass ceramics: strength data for the design of structures with high mechanical stresses

Peter Hartmann; Kurt Nattermann; Thorsten Döhring; Markus Kuhr; Peter Thomas; Guenther Kling; Peter Gath; Stefano Lucarelli

doi:10.1117/12.788854

23 July 2008 ZERODUR glass ceramics: strength data for the design of structures with high mechanical stresses

Peter Hartmann, Kurt Nattermann, Thorsten Döhring, Markus Kuhr, Peter Thomas, Guenther Kling, Peter Gath, Stefano Lucarelli

Author Affiliations +

Proceedings Volume 7018, Advanced Optical and Mechanical Technologies in Telescopes and Instrumentation; 70180P (2008) https://doi.org/10.1117/12.788854
Event: SPIE Astronomical Telescopes + Instrumentation, 2008, Marseille, France

Abstract

With an increasing number of applications mirrors and support structures made of the zero expansion glass ceramic material ZERODUR® has to endure high mechanical loads, e.g. rocket launches or controlled deformations for optical image correction. Like for other glassy materials, the strength of glass ceramics is dominated by its surface condition. Test specimens have been ground with fine grain tools (e.g. D64 diamond grains) and / or subsequently etched. The strength data basis for the design of highly stressed structures has been extended and new information has been derived for the extrapolation to low failure probabilities.

Citation Download Citation

Peter Hartmann, Kurt Nattermann, Thorsten Döhring, Markus Kuhr, Peter Thomas, Guenther Kling, Peter Gath, and Stefano Lucarelli "ZERODUR glass ceramics: strength data for the design of structures with high mechanical stresses", Proc. SPIE 7018, Advanced Optical and Mechanical Technologies in Telescopes and Instrumentation, 70180P (23 July 2008); https://doi.org/10.1117/12.788854

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