期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 568, 期 -, 页码 106-116出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2020.02.045
关键词
Microwave absorption; SiOC ceramic; Carbon fiber
资金
- National Nature Science Foundation of China [51902067, 51872066, 11402252, 11421091, 91216301]
- China National Funds for Distinguished Young Scientists [51525201]
- China Postdoctoral Science Foundation [2019M651282]
- Heilongjiang Provincial Postdoctoral Science Foundation [LBH-Z19022]
- Shanghai Aerospace Science and Technology Innovation Fund, China [SAST2019-012]
High-performance microwave absorption materials combined with good oxidation resistance and mechanical properties are highly desirable in some extreme situations. Herein, three-dimensional (3D) needled carbon fiber felts reinforced silicon oxycarbide (SiOC/CFs) composites with excellent electromagnetic (EM) wave absorption, good oxidation resistance and mechanical properties were successfully prepared through a simple precursor infiltration and pyrolysis (PIP) process. Notably, the EM wave absorption, oxidation resistance and mechanical performances strongly depend on the PIP cycles through adjusting the content of SiOC to control the porosity and density of the composites. A substantial enhancement of EM wave absorption performance of composites is achieved via incorporation of SiOC with different PIP cycles, resulting from the matched characteristic impedance and enhanced loss ability. The minimum reflection loss (RLmin) of pure carbon fiber felts is -8.4 dB, whose value is decreased to -62.9 dB for the composites with 1 PIP cycle, and to -49.9 dB for the composites with 2 PIP cycles, respectively. The results indicate that the as-prepared SiOC/CFs composites with superior EM wave absorption, great oxidation resistance and mechanical properties could be considered as a great potential for the applications in harsh environments. (C) 2020 Published by Elsevier Inc.
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