Microstructure and physical properties of SiCf/SiC composites fabricated by the CVI/LSI/PIP hybrid process

Young Seok Jeong, Min Ho Jang, Jung Won Kim, Kyoon Choi, Ho Gyu Yoon

Research output: Contribution to journalArticlepeer-review


The mechanical properties of SiCf/SiC composites depend on the microstructure of matrix, fiber and interphase. Therefore, the technology to control the microstructure of those components can be key to determining its application in the future. In this study, SiCf/SiC composite with a fiber volume fraction of 30 vol% was prepared using the CVI/LSI/PIP hybrid process. The apparent density and residual silicon of the prepared composite were measured to be 2.77 g/cm3 and 2 vol%, respectively. As a result of evaluatingthe tensile strength, the elastic modulus, PLS, and UTS of the SiCf/SiC composite at 1400 °C were measured to be 152.3 GPa, 125.1 MPa, and 144.1 MPa, respectively. Additionally, the crystallinity of the PyC interphase in SiCf/SiC composites was quantified using HRTEM, and the effect of the microstructure of the SiC matrix and PyC interphase on the mechanical properties discussed.

Original languageEnglish
Pages (from-to)161-169
Number of pages9
JournalJournal of the Korean Ceramic Society
Issue number1
Publication statusPublished - 2024 Jan

Bibliographical note

Publisher Copyright:
© 2023, The Korean Ceramic Society.


  • CVI/LSI/PIP hybrid process
  • High-temperature strength
  • PyC interphase
  • SiC/SiC composite

ASJC Scopus subject areas

  • Ceramics and Composites


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