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Proceedings Paper • Open Access

Si3N4 ceramic application for large telescope development results
Author(s): Christophe Devilliers; Thierry Lasic; David Boban; Laurence Cornillon; Dima Tanzilli; Sonia Aitzaid; Karl Berroth

Paper Abstract

Thales-Alenia-Space has identified the ceramic Si3N4 as an interesting material for the manufacturing of stiff , stable and lightweight truss structure for future large telescopes. Si3N4 ceramic made by FCT has been selected for its own intrinsic properties (high specific Young modulus, low CTE, very high intrinsic strength for a ceramics) and its cost effective beams manufacturing capabilities.

In order to qualify beam and beams end fittings for future large and thermo-elastical stable truss structure for space telescope, full development and tests activities have been performed. Manufacturing process has been optimized in order to obtain a very high reliable strength.

Full scale beams with thin wall have been manufactured and tested in bending and in tension. Full scale beam assembly with integrated junctions have been manufactured and tested up to ultimate loads and have been space qualified.

Beams end fittings made also in Si3N4 and its direct bolting capabilities have been also space qualified by tests.

Beside this qualification for current space telescope, developments are continuing thank to CNES R&T to develop high loaded brazed junction between Si3N4 parts, enhanced thermal conductivity and mechanical strength through Si3N4 formulation and manufacturing process tuning.

Paper Details

Date Published: 20 November 2017
PDF: 10 pages
Proc. SPIE 10564, International Conference on Space Optics — ICSO 2012, 1056412 (20 November 2017); doi: 10.1117/12.2309145
Show Author Affiliations
Christophe Devilliers, Thales Alenia Space (France)
Thierry Lasic, Thales Alenia Space (France)
David Boban, Thales Alenia Space (France)
Laurence Cornillon, Thales Alenia Space (France)
Dima Tanzilli, Thales Alenia Space (France)
Sonia Aitzaid, Ctr. National d'Études Spatiales (France)
Karl Berroth, FCT IngenieurKeramik GmbH (Germany)

Published in SPIE Proceedings Vol. 10564:
International Conference on Space Optics — ICSO 2012
Bruno Cugny; Errico Armandillo; Nikos Karafolas, Editor(s)

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