Oxidation properties of Zr-Nb alloys at 500-600°C under low oxygen potentials

Tatsumi Arima; Kensaku Miyata; Yaohiro Inagaki; Kazuya Idemitsu

doi:10.1016/j.corsci.2004.06.011

Oxidation properties of Zr-Nb alloys at 500-600°C under low oxygen potentials

Tatsumi Arima, Kensaku Miyata, Yaohiro Inagaki, Kazuya Idemitsu

Quantum Sciences of Materials

Research output: Contribution to journal › Article › peer-review

27 Citations (Scopus)

Abstract

Zr-Nb alloys with 1-10wt.% Nb content were oxidized at 500-600°C in the CO-CO₂ gas mixtures. The oxidation weight gain increased with Nb content and the kinetics except for Zr-1Nb alloy changed from cubic rate to linear one at 600°C for a long period of time, 7d. The cubic rate constant was almost insensitive to oxygen potential of oxidizing atmosphere. As the oxidation resistance deteriorated, the volume ratio of tetragonal to monoclinic zirconia phase and the relevant compressive stress in oxide film decreased with increase of Nb content. Before and after oxidation, Nb re-distribution could not be observed under the present experimental condition.

Original language	English
Pages (from-to)	435-446
Number of pages	12
Journal	Corrosion Science
Volume	47
Issue number	2
DOIs	https://doi.org/10.1016/j.corsci.2004.06.011
Publication status	Published - Feb 1 2005

All Science Journal Classification (ASJC) codes

Chemistry(all)
Chemical Engineering(all)
Materials Science(all)

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10.1016/j.corsci.2004.06.011

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title = "Oxidation properties of Zr-Nb alloys at 500-600°C under low oxygen potentials",

abstract = "Zr-Nb alloys with 1-10wt.% Nb content were oxidized at 500-600°C in the CO-CO2 gas mixtures. The oxidation weight gain increased with Nb content and the kinetics except for Zr-1Nb alloy changed from cubic rate to linear one at 600°C for a long period of time, 7d. The cubic rate constant was almost insensitive to oxygen potential of oxidizing atmosphere. As the oxidation resistance deteriorated, the volume ratio of tetragonal to monoclinic zirconia phase and the relevant compressive stress in oxide film decreased with increase of Nb content. Before and after oxidation, Nb re-distribution could not be observed under the present experimental condition.",

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T1 - Oxidation properties of Zr-Nb alloys at 500-600°C under low oxygen potentials

AU - Arima, Tatsumi

AU - Miyata, Kensaku

AU - Inagaki, Yaohiro

AU - Idemitsu, Kazuya

PY - 2005/2/1

Y1 - 2005/2/1

N2 - Zr-Nb alloys with 1-10wt.% Nb content were oxidized at 500-600°C in the CO-CO2 gas mixtures. The oxidation weight gain increased with Nb content and the kinetics except for Zr-1Nb alloy changed from cubic rate to linear one at 600°C for a long period of time, 7d. The cubic rate constant was almost insensitive to oxygen potential of oxidizing atmosphere. As the oxidation resistance deteriorated, the volume ratio of tetragonal to monoclinic zirconia phase and the relevant compressive stress in oxide film decreased with increase of Nb content. Before and after oxidation, Nb re-distribution could not be observed under the present experimental condition.

AB - Zr-Nb alloys with 1-10wt.% Nb content were oxidized at 500-600°C in the CO-CO2 gas mixtures. The oxidation weight gain increased with Nb content and the kinetics except for Zr-1Nb alloy changed from cubic rate to linear one at 600°C for a long period of time, 7d. The cubic rate constant was almost insensitive to oxygen potential of oxidizing atmosphere. As the oxidation resistance deteriorated, the volume ratio of tetragonal to monoclinic zirconia phase and the relevant compressive stress in oxide film decreased with increase of Nb content. Before and after oxidation, Nb re-distribution could not be observed under the present experimental condition.

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JO - Corrosion Science

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Oxidation properties of Zr-Nb alloys at 500-600°C under low oxygen potentials

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