Materials Reports  2019, Vol. 33 Issue (z1): 206-210 |
| INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
|
|
|
|
|
| Preparation of Outside Aerogel Heat Shields with Sandwich Structure by Using Non-pressure Impregnating Process |
| SU Lijun, ZHANG Lijuan, SONG Han, GUO Hui, GUO Jianye, LI Wenjing, YANG Jieying, PEI Yuchen
|
| Research Institute of Aerospace Special Materials and Processing Technology, Beijing 100074 |
|
|
|
|
Abstract Outside aerogel heat shields with sandwich structure have the characteristics with extremely efficient insulation of aerogel, and with excellent anti-washout for severe aerodynamic thermal flow, just like ceramic plate. It will have a promising prospect in the outside heat shielding area for the future aerospace vehicles. However, something wrong occurred when it was produced by using conventional pressure impregnating process, the aerogel was soaked by the plate ceramic precursor, broken down, and collapsed. Finally, the inherent insulative feature was lost. Non-pressure impregnating process was proposed, and the pressure impregnation was changed to non-pressure impregnation. The problems of soaked by the plate ceramic precursor and broken down were solved. When the concentration of plate ceramic precursor was adjusted, agglomerated particle size of molecular chain was transformed, and number of times for impregnation was changed, the mechanical property of the plate was enhanced. It is excellent in the heat-insulating property and strain capacity, with deflection of 8.89 mm, and with back temperature of 55 ℃ when heated by 1 200 ℃ in the wind tunnel for 1 000 s. This process has the potential applied value in the outside heat shielding area for the future aerospace vehicles
|
|
Published: 05 July 2019
|
|
|
| About author:: Lijun Su works in Research Institute of Aerospace Special Materials and Processing Technology as a senior engineer, graduated from Shanghai Jiao Tong University,and received Ph.D. degree in materials science. He is major in thermal insulation materials, and has published about five journal papers as the first author, applied about ten national invention patents and three of them were authorized.Wenjing Li works in Research Institute of Aerospace Special Materials and Processing Technology as a senior engineer, graduated from RWTH Aachen University. She is major in thermal insulation materials, and has published about ten journal papers, applied about sixteen national invention patents and which have been authorized. |
|
|
1 沈学霖, 朱光明, 杨鹏飞, 等. 高分子材料科学与工程,2016,10(32),164.
2 李俊宁, 胡子君, 孙陈诚, 等. 宇航材料工艺,2011,250(10),10.
3 施伟, 谭毅, 曹作暄, 等. 材料导报:综述篇,2012,26(10),344.
4 尹正帅, 刘义华, 雷宁, 等. 航天制造技术,2013(2),1.
5 马秀萍, 郭亚林, 张祎, 等. 航天制造技术,2018(1),2.
6 冯坚, 张常瑞, 冯军宗, 等.中国专利, CN200510031952.0,2015.
7 冯坚, 张长瑞, 高庆福, 等. 中国专利, CN200710034510.0,2007.
8 张长瑞, 姜勇刚, 冯坚, 等.中国专利, CN201010148105.3,2010.
9 张长瑞, 冯坚, 姜勇刚, 等. 中国专利, CN201010300112.0,2010.
10 冯坚, 姜勇刚, 张长瑞, 等. 中国专利, CN201110110947.4,2011.
11 韩露, 袁磊, 于景坤, 等. 耐火材料,2012,46(2),146.
12 刘成明, 吴建. 技术与市场,2013,20(10),33.
13 He Song, Huang Yajun, Chen Guangnan. et al. Journal of Hazardous Materials,2019,362,294.
14 Jessica Laskowski, Barbara Milow, Lorenz Ratke, et al. Journal of Non-Crystalline Solids,2016,441,42.
15 Lin Benhan, Cui Sheng, Liu Xueyong, et al. Journal of Wuhan University of Technology Materials Science Edition,2013,28(5),916.
16 曹峰, 冯坚, 姜勇刚, 等. 中国专利, CN 201210120442,2015. |
|
|
|
渝公网安备50019002502923号 © Editorial Office of Materials Reports.
