Effect of trace Ce on high-temperature oxidation behavior of an Al–Si-coated Ni-based single crystal superalloy

Xiao juan Pang; Shu suo Li; Lu Qin; Yan ling Pei; Sheng kai Gong

doi:10.1007/s42243-018-0214-0

Effect of trace Ce on high-temperature oxidation behavior of an Al–Si-coated Ni-based single crystal superalloy

Xiao juan Pang
, Shu suo Li
, Lu Qin
, Yan ling Pei^*
, Sheng kai Gong

^*Corresponding author for this work

Beihang University

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

16 Scopus citations

Abstract

Ni-based single crystal superalloy IC21 with different Ce contents was prepared by screw selection method, and Al–Si coatings were prepared by pack cementation. Cyclic oxidation and transient oxidation were carried out at 1150 °C to investigate the effect of Ce on the high-temperature oxidation behavior of Al–Si coatings. After cyclic oxidation at 1150 °C, the addition of trace Ce decreased the mass gain of the Al–Si-coated samples and effectively improved oxidation performance and spallation resistance. In specimens without Ce doping, microstructure examination revealed that bulky γ′-Ni ₃ Al precipitated in oxidized coating because of high Al consumption, and this finding suggests that Ce inhibits the consumption of Al in the coating during oxidation. Ce slows down the transformation of θ-Al ₂ O ₃ to α-Al ₂ O ₃ and improves the adhesion of the oxide scale.

Original language	English
Pages (from-to)	78-83
Number of pages	6
Journal	Journal of Iron and Steel Research International
Volume	26
Issue number	1
DOIs	https://doi.org/10.1007/s42243-018-0214-0
State	Published - 24 Jan 2019

Keywords

Al O
Al–Si coating
Oxidation behavior
Single crystal superalloy
Trace Ce

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10.1007/s42243-018-0214-0

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title = "Effect of trace Ce on high-temperature oxidation behavior of an Al–Si-coated Ni-based single crystal superalloy",

abstract = " Ni-based single crystal superalloy IC21 with different Ce contents was prepared by screw selection method, and Al–Si coatings were prepared by pack cementation. Cyclic oxidation and transient oxidation were carried out at 1150 °C to investigate the effect of Ce on the high-temperature oxidation behavior of Al–Si coatings. After cyclic oxidation at 1150 °C, the addition of trace Ce decreased the mass gain of the Al–Si-coated samples and effectively improved oxidation performance and spallation resistance. In specimens without Ce doping, microstructure examination revealed that bulky γ′-Ni 3 Al precipitated in oxidized coating because of high Al consumption, and this finding suggests that Ce inhibits the consumption of Al in the coating during oxidation. Ce slows down the transformation of θ-Al 2 O 3 to α-Al 2 O 3 and improves the adhesion of the oxide scale.",

keywords = "Al O, Al–Si coating, Oxidation behavior, Single crystal superalloy, Trace Ce",

author = "Pang, \{Xiao juan\} and Li, \{Shu suo\} and Lu Qin and Pei, \{Yan ling\} and Gong, \{Sheng kai\}",

note = "Publisher Copyright: {\textcopyright} 2019, China Iron and Steel Research Institute Group.",

year = "2019",

month = jan,

day = "24",

doi = "10.1007/s42243-018-0214-0",

language = "英语",

volume = "26",

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journal = "Journal of Iron and Steel Research International",

issn = "1006-706X",

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TY - JOUR

T1 - Effect of trace Ce on high-temperature oxidation behavior of an Al–Si-coated Ni-based single crystal superalloy

AU - Pang, Xiao juan

AU - Li, Shu suo

AU - Qin, Lu

AU - Pei, Yan ling

AU - Gong, Sheng kai

PY - 2019/1/24

Y1 - 2019/1/24

N2 - Ni-based single crystal superalloy IC21 with different Ce contents was prepared by screw selection method, and Al–Si coatings were prepared by pack cementation. Cyclic oxidation and transient oxidation were carried out at 1150 °C to investigate the effect of Ce on the high-temperature oxidation behavior of Al–Si coatings. After cyclic oxidation at 1150 °C, the addition of trace Ce decreased the mass gain of the Al–Si-coated samples and effectively improved oxidation performance and spallation resistance. In specimens without Ce doping, microstructure examination revealed that bulky γ′-Ni 3 Al precipitated in oxidized coating because of high Al consumption, and this finding suggests that Ce inhibits the consumption of Al in the coating during oxidation. Ce slows down the transformation of θ-Al 2 O 3 to α-Al 2 O 3 and improves the adhesion of the oxide scale.

AB - Ni-based single crystal superalloy IC21 with different Ce contents was prepared by screw selection method, and Al–Si coatings were prepared by pack cementation. Cyclic oxidation and transient oxidation were carried out at 1150 °C to investigate the effect of Ce on the high-temperature oxidation behavior of Al–Si coatings. After cyclic oxidation at 1150 °C, the addition of trace Ce decreased the mass gain of the Al–Si-coated samples and effectively improved oxidation performance and spallation resistance. In specimens without Ce doping, microstructure examination revealed that bulky γ′-Ni 3 Al precipitated in oxidized coating because of high Al consumption, and this finding suggests that Ce inhibits the consumption of Al in the coating during oxidation. Ce slows down the transformation of θ-Al 2 O 3 to α-Al 2 O 3 and improves the adhesion of the oxide scale.

KW - Al O

KW - Al–Si coating

KW - Oxidation behavior

KW - Single crystal superalloy

KW - Trace Ce

UR - https://www.scopus.com/pages/publications/85061755581

U2 - 10.1007/s42243-018-0214-0

DO - 10.1007/s42243-018-0214-0

M3 - 文章

AN - SCOPUS:85061755581

SN - 1006-706X

VL - 26

SP - 78

EP - 83

JO - Journal of Iron and Steel Research International

JF - Journal of Iron and Steel Research International

IS - 1

ER -

Effect of trace Ce on high-temperature oxidation behavior of an Al–Si-coated Ni-based single crystal superalloy

Abstract

Keywords

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