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

doi:10.1016/j.vacuum.2012.04.004

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

Materials Processing and Characterization Division

Research output: Contribution to journal › Article › peer-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 language	English
Pages (from-to)	98-102
Number of pages	5
Journal	Vacuum
Volume	88
Issue number	1
DOIs	https://doi.org/10.1016/j.vacuum.2012.04.004
Publication status	Published - 2013 Jan 1

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

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.",

keywords = "Oxidation behavior, Passive/active transition, Quantitative evaluation, SiC, Thermal protection system, ZrB",

author = "Ai Momozawa and Rong Tu and Takashi Goto and Yuuki Kubota and Hiroshi Hatta and Kimiya Komurasaki",

year = "2013",

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T1 - Quantitative evaluation of the oxidation behavior of ZrB 2-15 vol.%SiC at a low oxygen partial pressure

AU - Momozawa, Ai

AU - Tu, Rong

AU - Goto, Takashi

AU - Kubota, Yuuki

AU - Hatta, Hiroshi

AU - Komurasaki, Kimiya

PY - 2013/1/1

Y1 - 2013/1/1

N2 - 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.

AB - 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.

KW - Oxidation behavior

KW - Passive/active transition

KW - Quantitative evaluation

KW - SiC

KW - Thermal protection system

KW - ZrB

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