Environmental simulation experiments of 3D-C/SiC composites with different PyC interfacial layers

Ning Dong, Yongdong Xu, Laifei Cheng, Litong Zhang

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11 Scopus citations

Abstract

A series of 3D-C/SiC composites with different pyrolytic carbon (PyC) interfacial layers (about 20-300 nm thick) were prepared by the chemical vapor infiltration. Simulation experiments at different temperatures were performed by exposing C/SiC specimens in single and coupling gases partial pressure atmospheres, namely, O2, H2O vapor and molten salt (Na+) vapor. It was suggested that at an intermediate temperature range (about 600-800°C) a dramatic effect of PyC thickness on the weight and strength change of C/SiC was shown, which was mainly influenced by the O2 partial pressure; at the high temperature range (about 1200-1300°C) the effect was not obvious relatively, which might be influenced by the H2O vapor partial pressure; and finally at a very high temperature range (>1500°C) the molten salt vapor was the factor of most possibility affecting the weight change of C/SiC.

Original languageEnglish
Pages (from-to)77-80
Number of pages4
JournalJournal of Materials Science and Technology
Volume19
Issue numberSUPPL.
StatePublished - Dec 2003

Keywords

  • C/SiC
  • Interfacial layer
  • Simulation experiment

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