期刊
出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2013.07.029
关键词
Compression; Aerogel; Anisotropic; Viscous flow; Scanning Electron Microscope
类别
资金
- National Natural Science Foundation of China [NSFC 51275023]
- Innovation Foundation of BUAA [YWF-12-RBYJ-007]
Compression tests were conducted on a ceramic-fiber-reinforced SiO2 aerogel at high temperature. Anisotropic mechanical property was found. In-plane Young's modulus is more than 10 times higher than that of out-of-plane, but fracture strain is much lower by a factor of 100. Out-of-plane Young's modulus decreases with increasing temperature, but the in-plane modulus and fracture stress increase with temperature. The out-of-plane property does not change with loading rates. Viscous flow at high temperature is found to cause in-plane shrinkage, and both in-plane and out-of-plane properties change. Compression induced densification of aerogel matrix was also found by Scanning Electron Microscope analysis. (C) 2013 Elsevier B.V. All rights reserved.
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