Oxidation and microstructure evolution of Al-Si coated Ni3Al based single crystal superalloy with high Mo content

Xiaolu Tu; Hui Peng; Lei Zheng; Wenyan Qi; Jian He; Hongbo Guo; Shengkai Gong

doi:10.1016/j.apsusc.2014.11.076

Oxidation and microstructure evolution of Al-Si coated Ni₃Al based single crystal superalloy with high Mo content

Xiaolu Tu
, Hui Peng^*
, Lei Zheng
, Wenyan Qi
, Jian He
, Hongbo Guo
, Shengkai Gong

^*此作品的通讯作者

材料科学与工程学院

Beihang University

科研成果: 期刊稿件 › 文章 › 同行评审

39 引用（Scopus）

摘要

A Si modified aluminide (Al-Si) coating was prepared on a Ni3Al based single crystal superalloy with highMo content by high-activity pack cementation. Cyclic oxidation test at 1150°C was carried out and themicrostructure evolution of the coating was investigated. The results show that the oxidation resistanceof the substrate was greatly increased by applying an Al-Si coating. During oxidation, outward diffusionof Mo was effectively blocked due to its high affinity with Si. Besides, a layered structure was formed asa result of the elements inter-diffusion. An obvious degradation of the Al-Si coating was observed after100 h oxidation. Possible mechanisms related to the oxidation and elements inter-diffusion behaviourswere also discussed.

源语言	英语
页（从-至）	20-26
页数	7
期刊	Applied Surface Science
卷	325
期	C
DOI	https://doi.org/10.1016/j.apsusc.2014.11.076
出版状态	已出版 - 2015

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10.1016/j.apsusc.2014.11.076

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@article{1668039acdcb45d6bc53fb3110f81101,

title = "Oxidation and microstructure evolution of Al-Si coated Ni3Al based single crystal superalloy with high Mo content",

abstract = "A Si modified aluminide (Al-Si) coating was prepared on a Ni3Al based single crystal superalloy with highMo content by high-activity pack cementation. Cyclic oxidation test at 1150°C was carried out and themicrostructure evolution of the coating was investigated. The results show that the oxidation resistanceof the substrate was greatly increased by applying an Al-Si coating. During oxidation, outward diffusionof Mo was effectively blocked due to its high affinity with Si. Besides, a layered structure was formed asa result of the elements inter-diffusion. An obvious degradation of the Al-Si coating was observed after100 h oxidation. Possible mechanisms related to the oxidation and elements inter-diffusion behaviourswere also discussed.",

keywords = "Al-Si coating, Cyclic oxidationInter-diffusion, Pack cementation, Superalloy",

author = "Xiaolu Tu and Hui Peng and Lei Zheng and Wenyan Qi and Jian He and Hongbo Guo and Shengkai Gong",

year = "2015",

doi = "10.1016/j.apsusc.2014.11.076",

language = "英语",

volume = "325",

pages = "20--26",

journal = "Applied Surface Science",

issn = "0169-4332",

publisher = "Elsevier B.V.",

number = "C",

}

TY - JOUR

T1 - Oxidation and microstructure evolution of Al-Si coated Ni3Al based single crystal superalloy with high Mo content

AU - Tu, Xiaolu

AU - Peng, Hui

AU - Zheng, Lei

AU - Qi, Wenyan

AU - He, Jian

AU - Guo, Hongbo

AU - Gong, Shengkai

PY - 2015

Y1 - 2015

N2 - A Si modified aluminide (Al-Si) coating was prepared on a Ni3Al based single crystal superalloy with highMo content by high-activity pack cementation. Cyclic oxidation test at 1150°C was carried out and themicrostructure evolution of the coating was investigated. The results show that the oxidation resistanceof the substrate was greatly increased by applying an Al-Si coating. During oxidation, outward diffusionof Mo was effectively blocked due to its high affinity with Si. Besides, a layered structure was formed asa result of the elements inter-diffusion. An obvious degradation of the Al-Si coating was observed after100 h oxidation. Possible mechanisms related to the oxidation and elements inter-diffusion behaviourswere also discussed.

AB - A Si modified aluminide (Al-Si) coating was prepared on a Ni3Al based single crystal superalloy with highMo content by high-activity pack cementation. Cyclic oxidation test at 1150°C was carried out and themicrostructure evolution of the coating was investigated. The results show that the oxidation resistanceof the substrate was greatly increased by applying an Al-Si coating. During oxidation, outward diffusionof Mo was effectively blocked due to its high affinity with Si. Besides, a layered structure was formed asa result of the elements inter-diffusion. An obvious degradation of the Al-Si coating was observed after100 h oxidation. Possible mechanisms related to the oxidation and elements inter-diffusion behaviourswere also discussed.

KW - Al-Si coating

KW - Cyclic oxidationInter-diffusion

KW - Pack cementation

KW - Superalloy

UR - https://www.scopus.com/pages/publications/84927516000

U2 - 10.1016/j.apsusc.2014.11.076

DO - 10.1016/j.apsusc.2014.11.076

M3 - 文章

AN - SCOPUS:84927516000

SN - 0169-4332

VL - 325

SP - 20

EP - 26

JO - Applied Surface Science

JF - Applied Surface Science

IS - C

ER -

Oxidation and microstructure evolution of Al-Si coated Ni3Al based single crystal superalloy with high Mo content

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Oxidation and microstructure evolution of Al-Si coated Ni₃Al based single crystal superalloy with high Mo content