Oxidation behavior of Pt-Ir modified aluminized coatings on Ni-base single crystal superalloy TMS-82+

Aya Suzuki; Yingna Wu; Akihiro Yamaguchi; Hideyuki Murakami; Catherine M.F. Rae

doi:10.1007/s11085-007-9056-z

Oxidation behavior of Pt-Ir modified aluminized coatings on Ni-base single crystal superalloy TMS-82+

Aya Suzuki^*, Yingna Wu, Akihiro Yamaguchi, Hideyuki Murakami, Catherine M.F. Rae

^*Corresponding author for this work

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

27 Citations (Scopus)

Abstract

The oxidation resistance of Pt-Ir modified aluminized coatings, prepared by magnetron sputtering, was investigated. Cyclic oxidation tests revealed that Pt-30 at%Ir and Pt-50 at%Ir modified aluminide coatings demonstrated a smaller mass change compared with Pt, Pt-80 at%Ir and Ir modified aluminide coatings. Cross-sectional analyses following cyclic oxidation tests showed that the TGO layer formed on the Pt modified aluminide coating surface is almost twice as thick as those on the Pt-30 at%Ir and Pt-50 at%Ir coatings. In addition, the Pt-30 at%Ir and Pt-50 at%Ir samples had a much smoother surface than the Pt modified coatings after cyclic oxidation, and the latter suffered from severe surface rumpling. However, when the Ir content exceeded 80 at% in Pt-Ir modified coatings, internal voids formed during cyclic oxidation. These results show that the addition of 30-50 at%Ir to Pt-modified aluminized coatings is most effective in enhancing oxidation resistance.

Original language	English
Pages (from-to)	53-64
Number of pages	12
Journal	Oxidation of Metals
Volume	68
Issue number	1-2
DOIs	https://doi.org/10.1007/s11085-007-9056-z
Publication status	Published - 2007 Aug
Externally published	Yes

Keywords

Aluminizing
Bond-coat
Ni-base superalloy
Oxidation resistance
Platinum-iridium

ASJC Scopus subject areas

Inorganic Chemistry
Metals and Alloys
Materials Chemistry

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10.1007/s11085-007-9056-z

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title = "Oxidation behavior of Pt-Ir modified aluminized coatings on Ni-base single crystal superalloy TMS-82+",

abstract = "The oxidation resistance of Pt-Ir modified aluminized coatings, prepared by magnetron sputtering, was investigated. Cyclic oxidation tests revealed that Pt-30 at%Ir and Pt-50 at%Ir modified aluminide coatings demonstrated a smaller mass change compared with Pt, Pt-80 at%Ir and Ir modified aluminide coatings. Cross-sectional analyses following cyclic oxidation tests showed that the TGO layer formed on the Pt modified aluminide coating surface is almost twice as thick as those on the Pt-30 at%Ir and Pt-50 at%Ir coatings. In addition, the Pt-30 at%Ir and Pt-50 at%Ir samples had a much smoother surface than the Pt modified coatings after cyclic oxidation, and the latter suffered from severe surface rumpling. However, when the Ir content exceeded 80 at% in Pt-Ir modified coatings, internal voids formed during cyclic oxidation. These results show that the addition of 30-50 at%Ir to Pt-modified aluminized coatings is most effective in enhancing oxidation resistance.",

keywords = "Aluminizing, Bond-coat, Ni-base superalloy, Oxidation resistance, Platinum-iridium",

author = "Aya Suzuki and Yingna Wu and Akihiro Yamaguchi and Hideyuki Murakami and Rae, {Catherine M.F.}",

note = "Funding Information: Acknowledgments A part of this work has been carried out under the auspices of JSPS Grants-in Aid for Scientific Research, Grant-No. 16360343. The authors would like to acknowledge Profs. D. Young, T. Narita, and B. Gleeson for fruitful discussions and suggestions. The authors also thank Dr. H. Harada for supplying substrate Ni-base single-crystal superalloy TMS-82+.",

year = "2007",

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doi = "10.1007/s11085-007-9056-z",

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volume = "68",

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journal = "Oxidation of Metals",

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TY - JOUR

T1 - Oxidation behavior of Pt-Ir modified aluminized coatings on Ni-base single crystal superalloy TMS-82+

AU - Suzuki, Aya

AU - Wu, Yingna

AU - Yamaguchi, Akihiro

AU - Murakami, Hideyuki

AU - Rae, Catherine M.F.

N1 - Funding Information: Acknowledgments A part of this work has been carried out under the auspices of JSPS Grants-in Aid for Scientific Research, Grant-No. 16360343. The authors would like to acknowledge Profs. D. Young, T. Narita, and B. Gleeson for fruitful discussions and suggestions. The authors also thank Dr. H. Harada for supplying substrate Ni-base single-crystal superalloy TMS-82+.

PY - 2007/8

Y1 - 2007/8

N2 - The oxidation resistance of Pt-Ir modified aluminized coatings, prepared by magnetron sputtering, was investigated. Cyclic oxidation tests revealed that Pt-30 at%Ir and Pt-50 at%Ir modified aluminide coatings demonstrated a smaller mass change compared with Pt, Pt-80 at%Ir and Ir modified aluminide coatings. Cross-sectional analyses following cyclic oxidation tests showed that the TGO layer formed on the Pt modified aluminide coating surface is almost twice as thick as those on the Pt-30 at%Ir and Pt-50 at%Ir coatings. In addition, the Pt-30 at%Ir and Pt-50 at%Ir samples had a much smoother surface than the Pt modified coatings after cyclic oxidation, and the latter suffered from severe surface rumpling. However, when the Ir content exceeded 80 at% in Pt-Ir modified coatings, internal voids formed during cyclic oxidation. These results show that the addition of 30-50 at%Ir to Pt-modified aluminized coatings is most effective in enhancing oxidation resistance.

AB - The oxidation resistance of Pt-Ir modified aluminized coatings, prepared by magnetron sputtering, was investigated. Cyclic oxidation tests revealed that Pt-30 at%Ir and Pt-50 at%Ir modified aluminide coatings demonstrated a smaller mass change compared with Pt, Pt-80 at%Ir and Ir modified aluminide coatings. Cross-sectional analyses following cyclic oxidation tests showed that the TGO layer formed on the Pt modified aluminide coating surface is almost twice as thick as those on the Pt-30 at%Ir and Pt-50 at%Ir coatings. In addition, the Pt-30 at%Ir and Pt-50 at%Ir samples had a much smoother surface than the Pt modified coatings after cyclic oxidation, and the latter suffered from severe surface rumpling. However, when the Ir content exceeded 80 at% in Pt-Ir modified coatings, internal voids formed during cyclic oxidation. These results show that the addition of 30-50 at%Ir to Pt-modified aluminized coatings is most effective in enhancing oxidation resistance.

KW - Aluminizing

KW - Bond-coat

KW - Ni-base superalloy

KW - Oxidation resistance

KW - Platinum-iridium

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Oxidation behavior of Pt-Ir modified aluminized coatings on Ni-base single crystal superalloy TMS-82+

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