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SiC-based ceramic fibers have numerous applications as reinforcement materials. Herein, the in situ thermal stability of four types of SiC-based ceramic fibers from three generations was investigated in terms of elastic modulus and electrical conductivity at temperatures up to 1800 °C in a vacuum under low pressure (<10–4 Pa). A specific tensile test device (MacaSiC) for single fibers was used. Mechanical and physical properties were monitored during heating and cooling at 1200, 1500, and 1800 °C for 10 min. Fibers exposed at 1200, 1500, and 1800 °C for 10 min were evaluated by measuring tensile strength retention, and correlating them with fiber crystallinity and microstructural evolution. Third-generation fibers exhibited excellent thermal stability at temperatures up to 1800 °C. The strength degradation of the third-generation SiC fibers was associated with the enlargement of apparent β-SiC crystallites and carbonization caused by the release of Si in the annular region of the fibers.

Rights:

• Creative Commons BY-NC-ND Attribution-NonCommercial-NoDerivs 4.0 International
  

Keyword: Silicon carbide, Ceramic fiber, Mechanical property, Physical property, Microstructural analysis

Date published: 2023-10-05

Publisher: Elsevier BV

Journal:

• Journal of the European Ceramic Society (ISSN: 09552219) vol. 44 issue. 2 p. 802-814

Funding:

• Innovative Science and Technology Initiative for Security JPJ004596

Manuscript type: Author's version (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.5139

First published URL: https://doi.org/10.1016/j.jeurceramsoc.2023.10.008

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Updated at: 2025-10-21 16:16:59 +0900

Published on MDR: 2025-10-21 16:14:35 +0900