New strategy for impedance measurement of surface oxidation characteristic in ceramic fiber by controlling aspect ratio

Silicon carbide fibers (SiCf) are promising materials for high-temperature applications, because of their excellent thermal and mechanical properties. Due to the inevitable oxidation of SiCf used at high-temperature, the surface and interfacial properties of SiCf can be changed. Impedance analysis i...

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Bibliographic Details
Published inJournal of the European Ceramic Society Vol. 43; no. 10; pp. 4290 - 4298
Main Authors Kim, Hye Ri, Lee, Jinsil, Kim, Myeongju, Choi, Doo Hyun, Lee, Jungmin, Joo, Jong Hoon
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.08.2023
Subjects
Aspect ratio
Ceramic fiber
Impedance analysis
Oxidation behavior
Silicon carbide
Oxidation behavior
Silicon carbide
Aspect ratio
Impedance analysis
Ceramic fiber
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Summary:Silicon carbide fibers (SiCf) are promising materials for high-temperature applications, because of their excellent thermal and mechanical properties. Due to the inevitable oxidation of SiCf used at high-temperature, the surface and interfacial properties of SiCf can be changed. Impedance analysis is necessary to confirm the useful information for various properties. However, since single SiCf has a long length and a very small cross-section area, its capacitance is so small that impedance analysis is almost impossible. In this study, an in-situ analysis tool that can estimate the impedance of SiCf to confirm the resistance elements is proposed using bundled fiber specimens. It is confirmed that it is possible to measure the impedance of the SiCf under high-temperature and oxidation atmospheres by controlling the aspect ratio of the specimen. This tool provides a new pathway that can be applied in various systems by investigating the electrical properties according to the oxidation behavior.
ISSN:0955-2219
1873-619X
DOI:10.1016/j.jeurceramsoc.2023.03.032