Large-grain α-Al2O3 enabling ultra-high oxidation-resistant MCrAlY bond coats by surface pre-agglomeration treatment

Guo Hui Meng; Hong Liu; Mei Jun Liu; Tong Xu; Guan Jun Yang; Cheng Xin Li; Chang Jiu Li

doi:10.1016/j.corsci.2019.108275

Large-grain α-Al₂O₃ enabling ultra-high oxidation-resistant MCrAlY bond coats by surface pre-agglomeration treatment

School of Materials Science and Engineering

Xi'an Jiaotong University

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

58 Scopus citations

Abstract

In this study, large α-Al₂O₃ particles were prepared by a novel surface pre-agglomeration (SPA) treatment on the surface of MCrAlY bond coats. These large α-Al₂O₃ particles eventually improved the oxidation resistance of the LPPS and APS MCrAlY bond coats by a factor of three and eight times, respectively. Results confirm that these large α-Al₂O₃ particles resulted from the agglomeration of the as-deposited alumina film during the SPA treatment. Based on the characteristics of alumina film agglomeration, a 2-dimensional thermodynamic model was developed to analyze in detail the controlling factors of alumina film agglomeration.

Original language	English
Article number	108275
Journal	Corrosion Science
Volume	163
DOIs	https://doi.org/10.1016/j.corsci.2019.108275
State	Published - Feb 2020

Keywords

Film agglomeration
Grain size
High temperature oxidation
Thermal barrier coatings
Thermodynamic model

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10.1016/j.corsci.2019.108275

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@article{c725d167ed9742dfa8bdf6a4c23633cd,

title = "Large-grain α-Al2O3 enabling ultra-high oxidation-resistant MCrAlY bond coats by surface pre-agglomeration treatment",

abstract = "In this study, large α-Al2O3 particles were prepared by a novel surface pre-agglomeration (SPA) treatment on the surface of MCrAlY bond coats. These large α-Al2O3 particles eventually improved the oxidation resistance of the LPPS and APS MCrAlY bond coats by a factor of three and eight times, respectively. Results confirm that these large α-Al2O3 particles resulted from the agglomeration of the as-deposited alumina film during the SPA treatment. Based on the characteristics of alumina film agglomeration, a 2-dimensional thermodynamic model was developed to analyze in detail the controlling factors of alumina film agglomeration.",

keywords = "Film agglomeration, Grain size, High temperature oxidation, Thermal barrier coatings, Thermodynamic model",

author = "Meng, \{Guo Hui\} and Hong Liu and Liu, \{Mei Jun\} and Tong Xu and Yang, \{Guan Jun\} and Li, \{Cheng Xin\} and Li, \{Chang Jiu\}",

note = "Publisher Copyright: {\textcopyright} 2019 Elsevier Ltd",

year = "2020",

month = feb,

doi = "10.1016/j.corsci.2019.108275",

language = "英语",

volume = "163",

journal = "Corrosion Science",

issn = "0010-938X",

publisher = "Elsevier Ltd",

}

TY - JOUR

T1 - Large-grain α-Al2O3 enabling ultra-high oxidation-resistant MCrAlY bond coats by surface pre-agglomeration treatment

AU - Meng, Guo Hui

AU - Liu, Hong

AU - Liu, Mei Jun

AU - Xu, Tong

AU - Yang, Guan Jun

AU - Li, Cheng Xin

AU - Li, Chang Jiu

PY - 2020/2

Y1 - 2020/2

N2 - In this study, large α-Al2O3 particles were prepared by a novel surface pre-agglomeration (SPA) treatment on the surface of MCrAlY bond coats. These large α-Al2O3 particles eventually improved the oxidation resistance of the LPPS and APS MCrAlY bond coats by a factor of three and eight times, respectively. Results confirm that these large α-Al2O3 particles resulted from the agglomeration of the as-deposited alumina film during the SPA treatment. Based on the characteristics of alumina film agglomeration, a 2-dimensional thermodynamic model was developed to analyze in detail the controlling factors of alumina film agglomeration.

AB - In this study, large α-Al2O3 particles were prepared by a novel surface pre-agglomeration (SPA) treatment on the surface of MCrAlY bond coats. These large α-Al2O3 particles eventually improved the oxidation resistance of the LPPS and APS MCrAlY bond coats by a factor of three and eight times, respectively. Results confirm that these large α-Al2O3 particles resulted from the agglomeration of the as-deposited alumina film during the SPA treatment. Based on the characteristics of alumina film agglomeration, a 2-dimensional thermodynamic model was developed to analyze in detail the controlling factors of alumina film agglomeration.

KW - Film agglomeration

KW - Grain size

KW - High temperature oxidation

KW - Thermal barrier coatings

KW - Thermodynamic model

UR - https://www.scopus.com/pages/publications/85073722799

U2 - 10.1016/j.corsci.2019.108275

DO - 10.1016/j.corsci.2019.108275

M3 - 文章

AN - SCOPUS:85073722799

SN - 0010-938X

VL - 163

JO - Corrosion Science

JF - Corrosion Science

M1 - 108275

ER -

Large-grain α-Al₂O₃ enabling ultra-high oxidation-resistant MCrAlY bond coats by surface pre-agglomeration treatment

Abstract

Keywords

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