Oxidation behavior of SiC/SiC composites for helium cooled solid breeder blanket

S. Nogami, N. Otake, A. Hasegawa, Y. Katoh, A. Yoshikawa, M. Satou, Y. Oya, K. Okuno

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)

Abstract

In order to evaluate the oxidation behavior and mechanism of SiC/SiC composites with conventional pyrolitic graphite interface (PyC-SiC/SiC) and advanced multilayer interface (ML-SiC/SiC) in a HCSB blanket environment, a thermal gravimetric analysis (TGA) in He + O2 environment at 1000 °C and 1200 °C was performed. The PyC-SiC/SiC at 1200 °C and the ML-SiC/SiC at 1000 °C and 1200 °C showed relatively smaller weight change during oxidation because SiO2 formed on the SiC-matrix and SiC-fiber sealed the specimen surface before the PyC interface recession by gasification of graphite due to relatively high SiO2 formation rate. While the PyC-SiC/SiC at 1000 °C showed significant weight loss because the specimen surface was not sealed by SiO2 and significant PyC interface recession occurred due to relatively slow SiO2 formation.

Original languageEnglish
Pages (from-to)1490-1494
Number of pages5
JournalFusion Engineering and Design
Volume83
Issue number10-12
DOIs
Publication statusPublished - 2008 Dec

Keywords

  • Helium cooled solid breeder blanket
  • Interface
  • Oxidation
  • SiC/SiC composite
  • Thermal gravimetric analysis

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Nuclear Energy and Engineering
  • Materials Science(all)
  • Mechanical Engineering

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