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Research Article
Effect of different kinds of SiC fibers on microwave absorption and mechanical properties of SiCf/SiC composites
Zhaowen Ren
Northwestern Polytechnical University School of Science
Corresponding Author
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This work is licensed under a CC BY 4.0 License. Read Full License
The SiC fibers are essential for designing microwave absorption and mechanical properties of multifunctional composites. In this study, SLF, KD-II and KD-S SiC fibers were used to fabricate SiC f /SiC composites. The SLF SiC fibers are composed by amorphous SiOC. The KD-II and KD-S SiC fibers exhibit higher crystallizations and free carbon content. The conductivity of SLF, KD-II and KD-S SiC fibers are 0.0127, 1.184 and 0.1316 S/cm, respectively. The flexural strength of SLF, KD-II and KD-S SiC f /SiC composites are 147.77, 322.57 and 248.16 MPa, respectively. The microwave absorption property of the SLF SiC f /SiC composites can be obtained over -25 dB with a thickness of 2.3 mm and the effective absorption bandwidth (EAB) below -10 dB reaches 3.72 GHz with the thickness of 2.7 mm. In contrast, the KD-II SiC f /SiC composites only reach -3.6 dB in the whole X band when the thickness varies from 2 to 2.9 mm. KD-S SiC f /SiC composites can be obtained over -9dB with the thickness of 2mm and the EAB below -7 dB reaches 4.12 GHz with a thickness of 2.2 mm. The mechanisms of mechanical, microwave absorption and penitential applications for SiC f /SiC composites are also discussed.
Keywords
SiCf/SiC composites, microwave absorption, mechanical property, SiC fibers
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This is a preprint. It has not completed peer review.
Research Article
Effect of different kinds of SiC fibers on microwave absorption and mechanical properties of SiCf/SiC composites
Zhaowen Ren
Northwestern Polytechnical University School of Science
Corresponding Author
Badges
Prescreen
This manuscript passed our Prescreen assessment
Complete author information
Appropriate declaration statements
Potential risks to human health
Prescreen
History
CURRENT STATUS: Posted
Version 1
Posted 15 May, 2020
No community comments so far
Metrics
Comments: 0
PDF Downloads: ...
HTML Views: ...
Subject Areas
Ceramics
License:
This work is licensed under a CC BY 4.0 License. Read Full License
The SiC fibers are essential for designing microwave absorption and mechanical properties of multifunctional composites. In this study, SLF, KD-II and KD-S SiC fibers were used to fabricate SiC f /SiC composites. The SLF SiC fibers are composed by amorphous SiOC. The KD-II and KD-S SiC fibers exhibit higher crystallizations and free carbon content. The conductivity of SLF, KD-II and KD-S SiC fibers are 0.0127, 1.184 and 0.1316 S/cm, respectively. The flexural strength of SLF, KD-II and KD-S SiC f /SiC composites are 147.77, 322.57 and 248.16 MPa, respectively. The microwave absorption property of the SLF SiC f /SiC composites can be obtained over -25 dB with a thickness of 2.3 mm and the effective absorption bandwidth (EAB) below -10 dB reaches 3.72 GHz with the thickness of 2.7 mm. In contrast, the KD-II SiC f /SiC composites only reach -3.6 dB in the whole X band when the thickness varies from 2 to 2.9 mm. KD-S SiC f /SiC composites can be obtained over -9dB with the thickness of 2mm and the EAB below -7 dB reaches 4.12 GHz with a thickness of 2.2 mm. The mechanisms of mechanical, microwave absorption and penitential applications for SiC f /SiC composites are also discussed.
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
Figure 7
Figure 8