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17 November 2017 Silicon nitride ceramic development in Thales Alenia Space : qualification achievement and further developments for future applications
L. Cornillon, C. Devilliers, S. Behar-Lafenetre, S. Ait-Zaid, K. Berroth, A. C. Bravo
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Proceedings Volume 10563, International Conference on Space Optics — ICSO 2014; 105631H (2017) https://doi.org/10.1117/12.2304158
Event: International Conference on Space Optics — ICSO 2014, 2014, Tenerife, Canary Islands, Spain
Abstract
Dealing with ceramic materials for more than two decades, Thales Alenia Space – France has identified Silicon Nitride Si3N4 as a high potential material for the manufacturing of stiff, stable and lightweight truss structure for future large telescopes. Indeed, for earth observation or astronomic observation, space mission requires more and more telescopes with high spatial resolution, which leads to the use of large primary mirrors, and a long distance between primary and secondary mirrors. Therefore current and future large space telescopes require a huge truss structure to hold and locate precisely the mirrors. Such large structure requires very strong materials with high specific stiffness and a low coefficient of thermal expansion (CTE). Based on the silicon nitride performances and on the know how of FCT Ingenieurkeramik to manufacture complex parts, Thales Alenia Space (TAS) has engaged, in cooperation with FCT, activities to develop and qualify silicon nitride parts for other applications for space projects.
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L. Cornillon, C. Devilliers, S. Behar-Lafenetre, S. Ait-Zaid, K. Berroth, and A. C. Bravo "Silicon nitride ceramic development in Thales Alenia Space : qualification achievement and further developments for future applications", Proc. SPIE 10563, International Conference on Space Optics — ICSO 2014, 105631H (17 November 2017); https://doi.org/10.1117/12.2304158
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KEYWORDS
Manufacturing
Silicon
Ceramics
Astronomical imaging
Mirrors
Surface finishing
Space telescopes
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