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

doi:10.4028/www.scientific.net/KEM.484.21

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

Materials Processing and Characterization Division

Research output: Chapter in Book/Report/Conference proceeding › Conference 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 language	English
Title of host publication	Advanced Engineering Ceramics and Composites
Publisher	Trans Tech Publications Ltd
Pages	21-25
Number of pages	5
ISBN (Print)	9783037851814
DOIs	https://doi.org/10.4028/www.scientific.net/KEM.484.21
Publication status	Published - 2011

Publication series

Name	Key Engineering Materials
Volume	484
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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Oxidation behavior of ZrB₂-15vol.%SiC at an oxygen partial pressure of 57 Pa. / Ai, Momozawa; Kubota, Yuuki; Tu, Rong; Goto, Takashi; Takagi, Ken Ichi; Komurasaki, Kimiya; Hatta, Hiroshi.

Advanced Engineering Ceramics and Composites. Trans Tech Publications Ltd, 2011. p. 21-25 (Key Engineering Materials; Vol. 484).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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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.",

keywords = "Oxidation behavior, SiC, Thermal protection system, Thermobalance",

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AU - Ai, Momozawa

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AU - Tu, Rong

AU - Goto, Takashi

AU - Takagi, Ken Ichi

AU - Komurasaki, Kimiya

AU - Hatta, Hiroshi

PY - 2011

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N2 - 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.

AB - 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.

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KW - Thermal protection system

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