Microstructure and oxidation behaviour of Ir-rich Ir-Al binary alloys

Z. B. Bao; H. Murakami; Y. Yamabe-Mitarai

doi:10.1016/j.corsci.2014.06.038

Microstructure and oxidation behaviour of Ir-rich Ir-Al binary alloys

Z. B. Bao^*, H. Murakami, Y. Yamabe-Mitarai

^*この研究の対応する著者

研究成果: Article › 査読

18 被引用数 (Scopus)

抄録

In the current study, alloys of Ir-11Al, Ir-23Al, Ir-30Al, Ir-41Al and Ir-45Al (at.%) were prepared to investigate the microstructure and oxidation behaviour of Ir-rich Ir-Al alloys. Ir(Al)_ss and/or β-IrAl intermetallic phases were found to exist in the prepared alloys. During isothermal oxidation at 1100°C, the Ir(Al)_ss and β-IrAl individually changed to porous and dense Al₂O₃. The microstructure of the oxide scale formed on Ir-23Al was similar to that of its former alloy which possessed a dendrite-like configuration. It was found that the mass change of Ir-45Al followed a parabolic law, showing the best oxidation resistance among the Ir-Al alloys.

本文言語	English
ページ（範囲）	306-311
ページ数	6
ジャーナル	Corrosion Science
巻	87
DOI	https://doi.org/10.1016/j.corsci.2014.06.038
出版ステータス	Published - 2014 10月
外部発表	はい

ASJC Scopus subject areas

化学 (全般)
化学工学（全般）
材料科学（全般）

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10.1016/j.corsci.2014.06.038

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title = "Microstructure and oxidation behaviour of Ir-rich Ir-Al binary alloys",

abstract = "In the current study, alloys of Ir-11Al, Ir-23Al, Ir-30Al, Ir-41Al and Ir-45Al (at.%) were prepared to investigate the microstructure and oxidation behaviour of Ir-rich Ir-Al alloys. Ir(Al)ss and/or β-IrAl intermetallic phases were found to exist in the prepared alloys. During isothermal oxidation at 1100°C, the Ir(Al)ss and β-IrAl individually changed to porous and dense Al2O3. The microstructure of the oxide scale formed on Ir-23Al was similar to that of its former alloy which possessed a dendrite-like configuration. It was found that the mass change of Ir-45Al followed a parabolic law, showing the best oxidation resistance among the Ir-Al alloys.",

keywords = "A. Alloy, B. SEM, B. Weight loss, C. High temperature corrosion, C. Oxidation",

author = "Bao, {Z. B.} and H. Murakami and Y. Yamabe-Mitarai",

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T1 - Microstructure and oxidation behaviour of Ir-rich Ir-Al binary alloys

AU - Bao, Z. B.

AU - Murakami, H.

AU - Yamabe-Mitarai, Y.

PY - 2014/10

Y1 - 2014/10

N2 - In the current study, alloys of Ir-11Al, Ir-23Al, Ir-30Al, Ir-41Al and Ir-45Al (at.%) were prepared to investigate the microstructure and oxidation behaviour of Ir-rich Ir-Al alloys. Ir(Al)ss and/or β-IrAl intermetallic phases were found to exist in the prepared alloys. During isothermal oxidation at 1100°C, the Ir(Al)ss and β-IrAl individually changed to porous and dense Al2O3. The microstructure of the oxide scale formed on Ir-23Al was similar to that of its former alloy which possessed a dendrite-like configuration. It was found that the mass change of Ir-45Al followed a parabolic law, showing the best oxidation resistance among the Ir-Al alloys.

AB - In the current study, alloys of Ir-11Al, Ir-23Al, Ir-30Al, Ir-41Al and Ir-45Al (at.%) were prepared to investigate the microstructure and oxidation behaviour of Ir-rich Ir-Al alloys. Ir(Al)ss and/or β-IrAl intermetallic phases were found to exist in the prepared alloys. During isothermal oxidation at 1100°C, the Ir(Al)ss and β-IrAl individually changed to porous and dense Al2O3. The microstructure of the oxide scale formed on Ir-23Al was similar to that of its former alloy which possessed a dendrite-like configuration. It was found that the mass change of Ir-45Al followed a parabolic law, showing the best oxidation resistance among the Ir-Al alloys.

KW - A. Alloy

KW - B. SEM

KW - B. Weight loss

KW - C. High temperature corrosion

KW - C. Oxidation

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DO - 10.1016/j.corsci.2014.06.038

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VL - 87

SP - 306

EP - 311

JO - Corrosion Science

JF - Corrosion Science

ER -

Microstructure and oxidation behaviour of Ir-rich Ir-Al binary alloys

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