期刊
CERAMICS INTERNATIONAL
卷 44, 期 9, 页码 10726-10734出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2018.03.107
关键词
Carbon fiber felt; Phosphate-based geopolymer; Wave-absorption property; In situ fracture
资金
- National Key Research and Development Program of China [2017YFB0703200]
- National Natural Science Foundation of China (NSFC) [51502052, 51372048, 51321061, 51225203]
In this paper, phosphate-based geopolymer composites are studied and the effects of different carbon fiber felt contents (from 20 vol% to 40 vol%) on the phase composition, microstructure, mechanical properties and microwave absorbent properties from 2 GHz to 18 GHz frequency band of the composites were systematically investigated. The results indicate that with the increase in carbon fiber felt contents, flexural strength and Young's modulus of the composites gradually increased. The fracture mode of the composite changed from brittle failure to ductile failure with the presence of carbon fiber felt. It was mainly due to the micropore deformation as well as fibers pulling-out and the crack deflection, which consumed most fracture energy. However, microwave absorbent performance tended to increase at first and then decreased as the carbon fiber felt content ramping up. When the content of carbon fiber felt in the composite was 26.7 vol%, the composite showed the best microwave absorbent performance and the reflection loss reached to 59.3 dB. It is mainly attributed to the Debye polarization of the carbon fibers and the interface polarization between fibers and the matrix.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据