High-temperature CMAS resistance performance of Ti2AlC oxide scales

Jing Jing; Jimeng Li; Zhe He; Jian He; Hongbo Guo

doi:10.1016/j.corsci.2020.108832

High-temperature CMAS resistance performance of Ti₂AlC oxide scales

Jing Jing
, Jimeng Li
, Zhe He
, Jian He^*
, Hongbo Guo

^*Corresponding author for this work

School of Materials Science and Engineering

Beihang University

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

24 Scopus citations

Abstract

Failure of thermal barrier coatings (TBCs) caused by glassy deposits mostly composed of calcium-magnesium-aluminium-silicate (CMAS) has become an urgent issue. The addition of Al and Ti elements in TBCs is beneficial to improve the CMAS resistance. In this paper, bi-layered oxide scales were formed through pre-oxidation of Ti₂AlC (POTAC) bulks at high temperatures. The wettability and spreading behaviors of CMAS on the oxide scales, as well as the interaction between them were investigated by a sessile-drop method. The glassy CMAS deposit on the Al₂TiO₅ layer revealed the largest equilibrium contact angle and slowest diffusion-limited spreading rate among all the samples.

Original language	English
Article number	108832
Journal	Corrosion Science
Volume	174
DOIs	https://doi.org/10.1016/j.corsci.2020.108832
State	Published - Sep 2020

Keywords

Calcium-magnesium-aluminium-silicate (CMAS)
Oxidation
Thermal barrier coatings (TBCs)
TiAlC
Wetting

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10.1016/j.corsci.2020.108832

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title = "High-temperature CMAS resistance performance of Ti2AlC oxide scales",

abstract = "Failure of thermal barrier coatings (TBCs) caused by glassy deposits mostly composed of calcium-magnesium-aluminium-silicate (CMAS) has become an urgent issue. The addition of Al and Ti elements in TBCs is beneficial to improve the CMAS resistance. In this paper, bi-layered oxide scales were formed through pre-oxidation of Ti2AlC (POTAC) bulks at high temperatures. The wettability and spreading behaviors of CMAS on the oxide scales, as well as the interaction between them were investigated by a sessile-drop method. The glassy CMAS deposit on the Al2TiO5 layer revealed the largest equilibrium contact angle and slowest diffusion-limited spreading rate among all the samples.",

keywords = "Calcium-magnesium-aluminium-silicate (CMAS), Oxidation, Thermal barrier coatings (TBCs), TiAlC, Wetting",

author = "Jing Jing and Jimeng Li and Zhe He and Jian He and Hongbo Guo",

note = "Publisher Copyright: {\textcopyright} 2020 Elsevier Ltd",

year = "2020",

month = sep,

doi = "10.1016/j.corsci.2020.108832",

language = "英语",

volume = "174",

journal = "Corrosion Science",

issn = "0010-938X",

publisher = "Elsevier Ltd",

}

TY - JOUR

T1 - High-temperature CMAS resistance performance of Ti2AlC oxide scales

AU - Jing, Jing

AU - Li, Jimeng

AU - He, Zhe

AU - He, Jian

AU - Guo, Hongbo

PY - 2020/9

Y1 - 2020/9

N2 - Failure of thermal barrier coatings (TBCs) caused by glassy deposits mostly composed of calcium-magnesium-aluminium-silicate (CMAS) has become an urgent issue. The addition of Al and Ti elements in TBCs is beneficial to improve the CMAS resistance. In this paper, bi-layered oxide scales were formed through pre-oxidation of Ti2AlC (POTAC) bulks at high temperatures. The wettability and spreading behaviors of CMAS on the oxide scales, as well as the interaction between them were investigated by a sessile-drop method. The glassy CMAS deposit on the Al2TiO5 layer revealed the largest equilibrium contact angle and slowest diffusion-limited spreading rate among all the samples.

AB - Failure of thermal barrier coatings (TBCs) caused by glassy deposits mostly composed of calcium-magnesium-aluminium-silicate (CMAS) has become an urgent issue. The addition of Al and Ti elements in TBCs is beneficial to improve the CMAS resistance. In this paper, bi-layered oxide scales were formed through pre-oxidation of Ti2AlC (POTAC) bulks at high temperatures. The wettability and spreading behaviors of CMAS on the oxide scales, as well as the interaction between them were investigated by a sessile-drop method. The glassy CMAS deposit on the Al2TiO5 layer revealed the largest equilibrium contact angle and slowest diffusion-limited spreading rate among all the samples.

KW - Calcium-magnesium-aluminium-silicate (CMAS)

KW - Oxidation

KW - Thermal barrier coatings (TBCs)

KW - TiAlC

KW - Wetting

UR - https://www.scopus.com/pages/publications/85087866226

U2 - 10.1016/j.corsci.2020.108832

DO - 10.1016/j.corsci.2020.108832

M3 - 文章

AN - SCOPUS:85087866226

SN - 0010-938X

VL - 174

JO - Corrosion Science

JF - Corrosion Science

M1 - 108832

ER -

High-temperature CMAS resistance performance of Ti₂AlC oxide scales

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Keywords

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