TGO and Al diffusion behavior of CuAlxNiCrFe high-entropy alloys fabricated by high-speed laser cladding for TBC bond coats

Qing Long Xu; Kang Cheng Liu; Ke Yan Wang; Li Yan Lou; Yu Zhang; Chang Jiu Li; Cheng Xin Li

doi:10.1016/j.corsci.2021.109781

TGO and Al diffusion behavior of CuAl_xNiCrFe high-entropy alloys fabricated by high-speed laser cladding for TBC bond coats

Qing Long Xu
, Kang Cheng Liu
, Ke Yan Wang
, Li Yan Lou
, Yu Zhang
, Chang Jiu Li
, Cheng Xin Li

School of Materials Science and Engineering

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

44 Scopus citations

Abstract

CuAl_xNiCrFe (x = 0.5, 1, 1.5, 2) high-entropy alloys (HEAs) with good high-temperature oxidation resistance were deposited as bond coats via high-speed laser cladding. The microstructure of the CuAl_xNiCrFe bond coats exhibited the columnar-to-equiaxed grain transition with increasing Al content. All bond coats generated a uniform and dense aluminum oxide layer and exhibited a low thermally grown oxide (TGO) growth rate after 100 h of oxidation at 1100 °C. During oxidation, CuAl_1.5NiCrFe exhibited an extremely low Al diffusion coefficient, and the grain size of CuAlNiCrFe only grew by ~20%.

Original language	English
Article number	109781
Journal	Corrosion Science
Volume	192
DOIs	https://doi.org/10.1016/j.corsci.2021.109781
State	Published - Nov 2021

Keywords

Bond coat
CuAlxNiCrFe
Diffusion
High-entropy alloy
TBCs
TGO

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10.1016/j.corsci.2021.109781

Cite this

@article{f2cca602d349467998c188516086bfc7,

title = "TGO and Al diffusion behavior of CuAlxNiCrFe high-entropy alloys fabricated by high-speed laser cladding for TBC bond coats",

abstract = "CuAlxNiCrFe (x = 0.5, 1, 1.5, 2) high-entropy alloys (HEAs) with good high-temperature oxidation resistance were deposited as bond coats via high-speed laser cladding. The microstructure of the CuAlxNiCrFe bond coats exhibited the columnar-to-equiaxed grain transition with increasing Al content. All bond coats generated a uniform and dense aluminum oxide layer and exhibited a low thermally grown oxide (TGO) growth rate after 100 h of oxidation at 1100 °C. During oxidation, CuAl1.5NiCrFe exhibited an extremely low Al diffusion coefficient, and the grain size of CuAlNiCrFe only grew by \textasciitilde{}20\%.",

keywords = "Bond coat, CuAlxNiCrFe, Diffusion, High-entropy alloy, TBCs, TGO",

author = "Xu, \{Qing Long\} and Liu, \{Kang Cheng\} and Wang, \{Ke Yan\} and Lou, \{Li Yan\} and Yu Zhang and Li, \{Chang Jiu\} and Li, \{Cheng Xin\}",

note = "Publisher Copyright: {\textcopyright} 2021 Elsevier Ltd",

year = "2021",

month = nov,

doi = "10.1016/j.corsci.2021.109781",

language = "英语",

volume = "192",

journal = "Corrosion Science",

issn = "0010-938X",

publisher = "Elsevier Ltd",

}

TY - JOUR

T1 - TGO and Al diffusion behavior of CuAlxNiCrFe high-entropy alloys fabricated by high-speed laser cladding for TBC bond coats

AU - Xu, Qing Long

AU - Liu, Kang Cheng

AU - Wang, Ke Yan

AU - Lou, Li Yan

AU - Zhang, Yu

AU - Li, Chang Jiu

AU - Li, Cheng Xin

PY - 2021/11

Y1 - 2021/11

N2 - CuAlxNiCrFe (x = 0.5, 1, 1.5, 2) high-entropy alloys (HEAs) with good high-temperature oxidation resistance were deposited as bond coats via high-speed laser cladding. The microstructure of the CuAlxNiCrFe bond coats exhibited the columnar-to-equiaxed grain transition with increasing Al content. All bond coats generated a uniform and dense aluminum oxide layer and exhibited a low thermally grown oxide (TGO) growth rate after 100 h of oxidation at 1100 °C. During oxidation, CuAl1.5NiCrFe exhibited an extremely low Al diffusion coefficient, and the grain size of CuAlNiCrFe only grew by ~20%.

AB - CuAlxNiCrFe (x = 0.5, 1, 1.5, 2) high-entropy alloys (HEAs) with good high-temperature oxidation resistance were deposited as bond coats via high-speed laser cladding. The microstructure of the CuAlxNiCrFe bond coats exhibited the columnar-to-equiaxed grain transition with increasing Al content. All bond coats generated a uniform and dense aluminum oxide layer and exhibited a low thermally grown oxide (TGO) growth rate after 100 h of oxidation at 1100 °C. During oxidation, CuAl1.5NiCrFe exhibited an extremely low Al diffusion coefficient, and the grain size of CuAlNiCrFe only grew by ~20%.

KW - Bond coat

KW - CuAlxNiCrFe

KW - Diffusion

KW - High-entropy alloy

KW - TBCs

KW - TGO

UR - https://www.scopus.com/pages/publications/85114747513

U2 - 10.1016/j.corsci.2021.109781

DO - 10.1016/j.corsci.2021.109781

M3 - 文章

AN - SCOPUS:85114747513

SN - 0010-938X

VL - 192

JO - Corrosion Science

JF - Corrosion Science

M1 - 109781

ER -

TGO and Al diffusion behavior of CuAl_xNiCrFe high-entropy alloys fabricated by high-speed laser cladding for TBC bond coats

Abstract

Keywords

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