Quantitative evaluation of the oxidation behavior of ZrB 2-15 vol.%SiC at a low oxygen partial pressure

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

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

Oxidation tests of ZrB 2-SiC composite were carried out at 1373-1923 K under a low oxygen partial pressure of 57 Pa. By making composite with SiC, ZrB 2 shows good oxidation resistance. The ZrB 2-15 vol.%SiC composite shows better oxidation resistance at higher temperatures than ZrB 2-30 vol.%SiC with respect to mass decrease. The SiC depleting is the main cause of this mass decrease and is quite significant under the low oxygen partial pressure. The SiC depleting seems to start to occur at around 1673 K or higher. The mass changes of ZrB 2-15 vol.%SiC are quantitatively discussed by introducing an empirical equation. A first attempt of the evaluation of passive/active transition has been conducted using the obtained values.

Original languageEnglish
Pages (from-to)98-102
Number of pages5
JournalVacuum
Volume88
Issue number1
DOIs
Publication statusPublished - 2013

Keywords

  • Oxidation behavior
  • Passive/active transition
  • Quantitative evaluation
  • SiC
  • Thermal protection system
  • ZrB

ASJC Scopus subject areas

  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films

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