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Proceedings Paper

Manufacture of large-scale lightweight SiC mirror for space
Author(s): Zhengren Huang; Guiling Liu; Xuejian Liu; Zhongming Chen; Dongliang Jiang
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Paper Abstract

Large-scale lightweight silicon carbide (SiC) mirrors were manufactured for space. Sintered SiC (SSiC) ceramic was adopted as the material to manufacture these mirrors. Complex structure designed for highly weight reduction and installation requirements was near-net-shape formed on SiC green body by digital machining technique before the high temperature sintering process. The dimensional accuracy of thin ribs and faceplate can be precisely controlled above 99.5%. During sintering process, the temperature distribution was kept uniform enough to avoid residual stress and deformation in the whole furnace. Isotropic shrinkage occurs during densification from SiC green body to ceramic with a fluctuation less than 0.3%, which is the dimension error of the final size as well. Mirror surface with low surface roughness, high shape accuracy and reflectivity was finished by polishing and plating. Moreover, large-scale lightweight SSiC mirror was demonstrated to be suitable for space use by tests simulating launch conditions and space environments.

Paper Details

Date Published: 15 November 2011
PDF: 7 pages
Proc. SPIE 8335, 2012 International Workshop on Image Processing and Optical Engineering, 83351R (15 November 2011); doi: 10.1117/12.917585
Show Author Affiliations
Zhengren Huang, Shanghai Institute of Ceramics (China)
Guiling Liu, Shanghai Institute of Ceramics (China)
Xuejian Liu, Shanghai Institute of Ceramics (China)
Zhongming Chen, Shanghai Institute of Ceramics (China)
Dongliang Jiang, Shanghai Institute of Ceramics (China)

Published in SPIE Proceedings Vol. 8335:
2012 International Workshop on Image Processing and Optical Engineering
Hai Guo; Qun Ding, Editor(s)

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