Impedance spectroscopy technique for estimating the oxidation of the PyC interphase layer in a SiCf/SiC ceramic matrix composite

Kyung Ho Kim, Yoon Soo Han, Sahn Nahm, Sung Min Lee

Research output: Contribution to journalArticlepeer-review

Abstract

A new technique using impedance spectroscopy was developed to estimate the oxidation kinetics of the pyrolytic carbon interphase layer in SiCf/SiC ceramic matrix composites. The AC impedance Nyquist plot showed two semicircles that were curve-fitted using an equivalent circuit with two constant-phase element components. The analysis results revealed that the capacitance in the low-frequency region decreased with increasing oxidation time, whereas that in the high-frequency region remained relatively constant. This change in the capacitance in the low-frequency region was associated with the thickness of the oxidized SiO2 layer. This study might make a significant contribution to the literature, which has mostly focused on the characterization of ceramic matrix composites through measurements of mechanical properties. The limitations and potential applications of the developed method were also elucidated.

Original languageEnglish
Pages (from-to)291-299
Number of pages9
JournalJournal of Asian Ceramic Societies
Volume11
Issue number3
DOIs
Publication statusPublished - 2023

Bibliographical note

Funding Information:
The work was supported by the National Research Foundation of Korea [NRF-2020M3H4A3106001]

Publisher Copyright:
© 2023 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group on behalf of The Korean Ceramic Society and The Ceramic Society of Japan.

Keywords

  • Composites
  • SiC
  • impedance
  • mechanical properties

ASJC Scopus subject areas

  • Ceramics and Composites

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