Design of a C/SiC functionally graded coating for the oxidation protection of C/C composites

J. I. Kim, W. J. Kim, D. J. Choi, J. Y. Park, W. S. Ryu

Research output: Contribution to journalArticle

152 Citations (Scopus)

Abstract

To reduce the residual thermal stress between the carbon fiber-reinforced carbon (C/C) composites and the SiC coating layer, functionally graded materials (FGM) consisting of a C/SiC compositionally graded layer (C/SiC interlayer) were adopted. After designing the compositional distribution of the C/SiC interlayer which can relieve the thermal stress effectively, the deposition conditions of the entire compositional range of the C/SiC composites were determined using a thermodynamic calculation. According to the design and calculation the C/SiC interlayer and the SiC outer layer were deposited on the C/C composites by a low pressure chemical vapor deposition (LPCVD) method at deposition temperatures of 1100 and 1300 °C. The stress calculation and the experimental results suggested that the SiC-rich compositional profile in the FGM layer is the most effective for relieving the thermal stress and increasing the oxidation resistance.

Original languageEnglish
Pages (from-to)1749-1757
Number of pages9
JournalCarbon
Volume43
Issue number8
DOIs
Publication statusPublished - 2005 Jul 1

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)

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