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Proceedings Paper

ZERODUR glass ceramics: strength data for the design of structures with high mechanical stresses
Author(s): Peter Hartmann; Kurt Nattermann; Thorsten Döhring; Markus Kuhr; Peter Thomas; Guenther Kling; Peter Gath; Stefano Lucarelli
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Paper 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.

Paper Details

Date Published: 23 July 2008
PDF: 13 pages
Proc. SPIE 7018, Advanced Optical and Mechanical Technologies in Telescopes and Instrumentation, 70180P (23 July 2008); doi: 10.1117/12.788854
Show Author Affiliations
Peter Hartmann, SCHOTT AG (Germany)
Kurt Nattermann, SCHOTT AG (Germany)
Thorsten Döhring, SCHOTT AG (Germany)
Markus Kuhr, SCHOTT AG (Germany)
Peter Thomas, SCHOTT AG (Germany)
Guenther Kling, EADS Astrium Satellites (Germany)
Peter Gath, EADS Astrium Satellites (Germany)
Stefano Lucarelli, EADS Astrium Satellites (Germany)

Published in SPIE Proceedings Vol. 7018:
Advanced Optical and Mechanical Technologies in Telescopes and Instrumentation
Eli Atad-Ettedgui; Dietrich Lemke, Editor(s)

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