| 空间用反应烧结碳化硅反射镜坯体制备技术研究 |
| |
| 引用本文： | 张舸,赵汝成,赵文兴.空间用反应烧结碳化硅反射镜坯体制备技术研究[J].空间科学学报,2011,31(3). |
| |
| 作者姓名： | 张舸 赵汝成 赵文兴 |
| |
| 作者单位： | 中国科学院长春光学精密机械与物理研究所中国科学院光学系统先进制造技术重点实验室,长春,130033 |
| |
| 基金项目： | 中国科学院三期创新项目资助 |
| |
| 摘 要： | 采用凝胶注模(gel-casting)成型工艺并结合一种先进的消失模技术,制备了具有各种不同轻量化结构形式的碳化硅(SiC)陶瓷素坯,目前制备的背部半封闭素坯最大尺寸为1080mm×820 mm;素坯经过脱模、干燥、脱脂和反应烧结等,可得到空间用SiC反射镜坯体.对反应烧结碳化硅(RB-SiC)反射镜坯体的表面进行了光学加工,并且测试了其各项性能.结果表明,所制备的RB-SiC陶瓷内部结构均匀致密;力学性能和热学性能优异,弹性模量、抗弯强度、断裂韧性和热膨胀系数分别达到了330 GPa,340 MPa,4.0 MPa.m1/2和2.6×10-6K-1;镜体经抛光后的表面粗糙度RMS值优于3 nm,可作为空间用反射镜的候选材料.
|
| 关 键 词： | 凝胶注模 反应烧结 碳化硅 空间反射镜 |
Study on Fabrication Technology of Reaction Bonded Silicon Carbide Mirror Blank for Space |
| |
| ZHANG Ge,ZHAO Rucheng,ZHAO Wenxing.Study on Fabrication Technology of Reaction Bonded Silicon Carbide Mirror Blank for Space[J].Chinese Journal of Space Science,2011,31(3). |
| |
| Authors: | ZHANG Ge ZHAO Rucheng ZHAO Wenxing |
| |
| Institution: | ZHANG Ge ZHAO Rucheng ZHAO Wenxing (Key Laboratory of Optical System Advanced Manufacturing Technology,Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033) |
| |
| Abstract: | Silicon Carbide(SiC)is a new type of candidate material for large-scale lightweight space born mirror.Its low thermal distortion,high stiffness,high optical quality,and its dimensional stability are better than other traditional optical substrate materials such as ULE,Zerodure,Beryllium (Be)and so on.In this paper,the lightweight silicon carbide space mirror blank was fabricated by reaction sintering.Lots of large scale SiC green bodies were prepared by a gel-casting method with the lost mould technology.An... |
| |
| Keywords: | Gel-casting Reaction bonded Silicon carbide Spaceborne mirror |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
