Isothermal oxidation behaviors of packed aluminide coatings of Ni-Cr-W superalloy at 1100℃

Jian Wang; Pingxiang Zhang; Rui Hu; Jinshan Li; Jian Ma

Isothermal oxidation behaviors of packed aluminide coatings of Ni-Cr-W superalloy at 1100℃

Jian Wang, Pingxiang Zhang, Rui Hu, Jinshan Li, Jian Ma

School of Materials Sience and Engineering

Northwestern Polytechnical University Xian

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

8 Scopus citations

Abstract

The isothermal oxidation behavior of packed aluminide coatings of Ni-Cr-W superalloy at 1100℃ was investigated. Results from scanning electron microscopy and X-ray diffraction indicate that the oxidation dynamics curve of packed aluminide coatings can be divided into two stages: initial rapidly stage and metaphase slowly stage. Oxides on packed aluminide coatings surface have a transformation process as following: crystal θ-A1₂O₃→equalaxial α-A1₂O₃→α-A1₂O₃→particle α-A1₂O₃→particle unite α-A1₂O₃ during the whole oxidation. During the initial stage of oxidation, carbides can be able to holdback coating degeneration caused by interdiffusion between Ni element and Al element.

Original language	English
Pages (from-to)	1169-1172
Number of pages	4
Journal	Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering
Volume	44
Issue number	5
State	Published - 1 May 2015

Keywords

Ni-Cr-W superalloy
Oxidation scale
Packed aluminide coatings

Cite this

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title = "Isothermal oxidation behaviors of packed aluminide coatings of Ni-Cr-W superalloy at 1100℃",

abstract = "The isothermal oxidation behavior of packed aluminide coatings of Ni-Cr-W superalloy at 1100℃ was investigated. Results from scanning electron microscopy and X-ray diffraction indicate that the oxidation dynamics curve of packed aluminide coatings can be divided into two stages: initial rapidly stage and metaphase slowly stage. Oxides on packed aluminide coatings surface have a transformation process as following: crystal θ-A12O3→equalaxial α-A12O3→α-A12O3→particle α-A12O3→particle unite α-A12O3 during the whole oxidation. During the initial stage of oxidation, carbides can be able to holdback coating degeneration caused by interdiffusion between Ni element and Al element.",

keywords = "Ni-Cr-W superalloy, Oxidation scale, Packed aluminide coatings",

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T1 - Isothermal oxidation behaviors of packed aluminide coatings of Ni-Cr-W superalloy at 1100℃

AU - Wang, Jian

AU - Zhang, Pingxiang

AU - Hu, Rui

AU - Li, Jinshan

AU - Ma, Jian

PY - 2015/5/1

Y1 - 2015/5/1

N2 - The isothermal oxidation behavior of packed aluminide coatings of Ni-Cr-W superalloy at 1100℃ was investigated. Results from scanning electron microscopy and X-ray diffraction indicate that the oxidation dynamics curve of packed aluminide coatings can be divided into two stages: initial rapidly stage and metaphase slowly stage. Oxides on packed aluminide coatings surface have a transformation process as following: crystal θ-A12O3→equalaxial α-A12O3→α-A12O3→particle α-A12O3→particle unite α-A12O3 during the whole oxidation. During the initial stage of oxidation, carbides can be able to holdback coating degeneration caused by interdiffusion between Ni element and Al element.

AB - The isothermal oxidation behavior of packed aluminide coatings of Ni-Cr-W superalloy at 1100℃ was investigated. Results from scanning electron microscopy and X-ray diffraction indicate that the oxidation dynamics curve of packed aluminide coatings can be divided into two stages: initial rapidly stage and metaphase slowly stage. Oxides on packed aluminide coatings surface have a transformation process as following: crystal θ-A12O3→equalaxial α-A12O3→α-A12O3→particle α-A12O3→particle unite α-A12O3 during the whole oxidation. During the initial stage of oxidation, carbides can be able to holdback coating degeneration caused by interdiffusion between Ni element and Al element.

KW - Ni-Cr-W superalloy

KW - Oxidation scale

KW - Packed aluminide coatings

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SN - 1002-185X

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JO - Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering

JF - Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering

IS - 5

ER -

Isothermal oxidation behaviors of packed aluminide coatings of Ni-Cr-W superalloy at 1100℃

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Keywords

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