Oxidation behavior of ZrB2-15vol.%SiC at an oxygen partial pressure of 57 Pa

Momozawa Ai, Yuuki Kubota, Rong Tu, Takashi Goto, Ken Ichi Takagi, Kimiya Komurasaki, Hiroshi Hatta

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

The oxidation tests of the ZrB2-15vol.%SiC composite were carried out at 1673-1923 K under a low partial pressure of oxygen. Cross sections of the oxidized samples were studied using WDS. The reaction layer consists of ZrO2 and SiO2 at 1673 K. The SiO2 protective layer is formed on the surface. No apparent SiC depleted layer is observed. SiC depletion seems to occur at 1923 K and only the ZrO2 phase exists at the reaction layer. The passive oxidation occurs at 1673 K, whereas the active oxidation at 1923 K. The mass changes are quantitatively discussed by introducing a new emprical equation. The ZrB2-30 vol.%SiC composite is also discussed briefly.

Original languageEnglish
Title of host publicationAdvanced Engineering Ceramics and Composites
PublisherTrans Tech Publications Ltd
Pages21-25
Number of pages5
ISBN (Print)9783037851814
DOIs
Publication statusPublished - 2011

Publication series

NameKey Engineering Materials
Volume484
ISSN (Print)1013-9826
ISSN (Electronic)1662-9795

Keywords

  • Oxidation behavior
  • SiC
  • Thermal protection system
  • Thermobalance

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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