Fabrication and properties of ultra-lightweight SiC mirror

	Fabrication and properties of ultra-lightweight SiC mirror
	Dong, B.-C. and G. Zhang
	2015
发表期刊	Guangxue Jingmi Gongcheng/Optics and Precision Engineering
卷号	23 期号:8 页码:2185-2191
摘要	Vacuum pressure assisted gel-casting and reaction sintering were applied to fabrication of 200 and 500 mm ultra-lightweight SiC mirrors with the area densities of 9.17 kg/msup2/sup and 10.8 kg/msup2/sup respectively. The main properties of the SiC mirrors were tested. The results show that the green bodies of the SiC mirrors have no macroscopic defects due to its pouring in a vacuum environment. The mirror materials have high flexural strength (335 MPa) and fracture toughness (4.5 MPamsup1/2/sup) because of the fine SiC particles. The metallographic structures of the mirror materials do not show the directional alignment of SiC particles, which means the mirror materials possess a high isotropy ratio, in which the relative deviation of Coefficient of Thermal Expansion (CTE) is less than 3%, and the relative deviation of modulus reaches 1.3%. After polishing, the surface profile accuracy (RMS) of the mirror is 0.043 (=632.8 nm), and the toughness is better than 5 nm. These results demonstrate that the ultra-lightweight SiC mirrors fabricated by vacuum-assisted gel-casting and reaction sintering have excellent performance, and are suitable for fabrication of the mirrors of space cameras. , 2015, Chinese Academy of Sciences. All right reserved.
文章类型	期刊论文
收录类别	EI
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/56023
专题	中科院长春光机所知识产出
推荐引用方式 GB/T 7714	Dong, B.-C. and G. Zhang. Fabrication and properties of ultra-lightweight SiC mirror[J]. Guangxue Jingmi Gongcheng/Optics and Precision Engineering,2015,23(8):2185-2191.
APA	Dong, B.-C. and G. Zhang.(2015).Fabrication and properties of ultra-lightweight SiC mirror.Guangxue Jingmi Gongcheng/Optics and Precision Engineering,23(8),2185-2191.
MLA	Dong, B.-C. and G. Zhang."Fabrication and properties of ultra-lightweight SiC mirror".Guangxue Jingmi Gongcheng/Optics and Precision Engineering 23.8(2015):2185-2191.

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