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CAS IR Grid
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长春光学精密机械与物... [1]
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OAI收割 [1]
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会议论文 [1]
发表日期
2010 [1]
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Manufacture of 1.2m reaction bonded silicon carbide mirror blank CFID (EI CONFERENCE)
会议论文
OAI收割
5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes, April 26, 2010 - April 29, 2010, Dalian, China
作者:
Zhang G.
;
Zhang G.
;
Zhang G.
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提交时间:2013/03/25
Silicon carbide (SiC) is a new type candidate material for large-scale lightweight space mirror. Its low thermal distortion
high stiffness
fine optical quality and dimensional stability
make SiC an ideal material for large space born telescope. Since ten years Changchun institute optics
fine mechanics and physics (CIOMP) has developed reaction bonded SiC (RB-SiC) technology for space application
and can fabricate RB-SiC mirror with scale less than 1.0 meter for telescope. The green body is prepared with gel-casting method which is an attractive new ceramic forming process for making high-quality
complex-shaped ceramic parts. And then unmolding
drying
binder burning out
reacting bonded
the RB-SiC can be obtained. But with the development of space-born or ground telescope
the scale of primary mirror has exceeded 1.0 meter. So CIOMP has developed an assembly technique which called novel reaction-formed joint technology for larger RB-SiC mirror blank. The steps include joining of green bodies with mixture comprised of SiC particles and phenolic resin etc
firing
machining and sintering. Joining the 1.2 meter RB-SiC mirror blank by the novel reaction-formed joint technology. And testing the welding layer's performance
the results show that the thickness of 54-77m
the microstructure and thermal property can be comparable to the substrate and the mechanical property are excellent in bending strength of 307MPa. 2010 Copyright SPIE - The International Society for Optical Engineering.