Microstructure and thermal properties of nanostructured gadolinia doped yttria-stabilized zirconia thermal barrier coatings produced by air plasma spraying

Yixiong Wang; Chungen Zhou

doi:10.1016/j.ceramint.2016.05.084

Microstructure and thermal properties of nanostructured gadolinia doped yttria-stabilized zirconia thermal barrier coatings produced by air plasma spraying

Yixiong Wang
, Chungen Zhou^*

^*Corresponding author for this work

School of Materials Science and Engineering

Beihang University

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

61 Scopus citations

Abstract

In this article, the nanostructured 2 mol% Gd₂O₃-4.5 mol% Y₂O₃-ZrO₂(2GdYSZ) coating was developed by the atmospheric plasma spraying technique. And the microstructure and thermal properties of plasma-sprayed 2GdYSZ coating were investigated. The result from the investigation indicates that the as-sprayed coating is characterized by typical microstructure consisting of melted zones, nano-zones, splats, nano-pores, high-volume spheroidal pores and micro-cracks. The 2GdYSZ coating shows a lower resistance to destabilization of the metastable tetragonal (t′) phase compared to the yttria stabilized zirconia(YSZ). The thermal diffusivity and thermal conductivity of the nano-2GdYSZ coating at room temperature are 0.431 mm² s⁻¹ and 1.042 W/m K, respectively. Addition of gadolinia to the nano-YSZ can significantly reduce the thermal conductivity compared to the nano-YSZ and the conventional YSZ. The reduction is mainly attributed to the synergetic effect of gadolinia doping along with nanostructure.

Original language	English
Pages (from-to)	13047-13052
Number of pages	6
Journal	Ceramics International
Volume	42
Issue number	11
DOIs	https://doi.org/10.1016/j.ceramint.2016.05.084
State	Published - 15 Aug 2016

Keywords

GdO
Nanostructure
Thermal conductivity
Yttria stabilized zirconia(YSZ)

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10.1016/j.ceramint.2016.05.084

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@article{ec5f83ca41334980832b0a3ec4557176,

title = "Microstructure and thermal properties of nanostructured gadolinia doped yttria-stabilized zirconia thermal barrier coatings produced by air plasma spraying",

abstract = "In this article, the nanostructured 2 mol\% Gd2O3-4.5 mol\% Y2O3-ZrO2(2GdYSZ) coating was developed by the atmospheric plasma spraying technique. And the microstructure and thermal properties of plasma-sprayed 2GdYSZ coating were investigated. The result from the investigation indicates that the as-sprayed coating is characterized by typical microstructure consisting of melted zones, nano-zones, splats, nano-pores, high-volume spheroidal pores and micro-cracks. The 2GdYSZ coating shows a lower resistance to destabilization of the metastable tetragonal (t′) phase compared to the yttria stabilized zirconia(YSZ). The thermal diffusivity and thermal conductivity of the nano-2GdYSZ coating at room temperature are 0.431 mm2 s−1 and 1.042 W/m K, respectively. Addition of gadolinia to the nano-YSZ can significantly reduce the thermal conductivity compared to the nano-YSZ and the conventional YSZ. The reduction is mainly attributed to the synergetic effect of gadolinia doping along with nanostructure.",

keywords = "GdO, Nanostructure, Thermal conductivity, Yttria stabilized zirconia(YSZ)",

author = "Yixiong Wang and Chungen Zhou",

note = "Publisher Copyright: {\textcopyright} 2016 Elsevier Ltd and Techna Group S.r.l.",

year = "2016",

month = aug,

day = "15",

doi = "10.1016/j.ceramint.2016.05.084",

language = "英语",

volume = "42",

pages = "13047--13052",

journal = "Ceramics International",

issn = "0272-8842",

publisher = "Elsevier Ltd",

number = "11",

}

TY - JOUR

T1 - Microstructure and thermal properties of nanostructured gadolinia doped yttria-stabilized zirconia thermal barrier coatings produced by air plasma spraying

AU - Wang, Yixiong

AU - Zhou, Chungen

PY - 2016/8/15

Y1 - 2016/8/15

N2 - In this article, the nanostructured 2 mol% Gd2O3-4.5 mol% Y2O3-ZrO2(2GdYSZ) coating was developed by the atmospheric plasma spraying technique. And the microstructure and thermal properties of plasma-sprayed 2GdYSZ coating were investigated. The result from the investigation indicates that the as-sprayed coating is characterized by typical microstructure consisting of melted zones, nano-zones, splats, nano-pores, high-volume spheroidal pores and micro-cracks. The 2GdYSZ coating shows a lower resistance to destabilization of the metastable tetragonal (t′) phase compared to the yttria stabilized zirconia(YSZ). The thermal diffusivity and thermal conductivity of the nano-2GdYSZ coating at room temperature are 0.431 mm2 s−1 and 1.042 W/m K, respectively. Addition of gadolinia to the nano-YSZ can significantly reduce the thermal conductivity compared to the nano-YSZ and the conventional YSZ. The reduction is mainly attributed to the synergetic effect of gadolinia doping along with nanostructure.

AB - In this article, the nanostructured 2 mol% Gd2O3-4.5 mol% Y2O3-ZrO2(2GdYSZ) coating was developed by the atmospheric plasma spraying technique. And the microstructure and thermal properties of plasma-sprayed 2GdYSZ coating were investigated. The result from the investigation indicates that the as-sprayed coating is characterized by typical microstructure consisting of melted zones, nano-zones, splats, nano-pores, high-volume spheroidal pores and micro-cracks. The 2GdYSZ coating shows a lower resistance to destabilization of the metastable tetragonal (t′) phase compared to the yttria stabilized zirconia(YSZ). The thermal diffusivity and thermal conductivity of the nano-2GdYSZ coating at room temperature are 0.431 mm2 s−1 and 1.042 W/m K, respectively. Addition of gadolinia to the nano-YSZ can significantly reduce the thermal conductivity compared to the nano-YSZ and the conventional YSZ. The reduction is mainly attributed to the synergetic effect of gadolinia doping along with nanostructure.

KW - GdO

KW - Nanostructure

KW - Thermal conductivity

KW - Yttria stabilized zirconia(YSZ)

UR - https://www.scopus.com/pages/publications/84969213517

U2 - 10.1016/j.ceramint.2016.05.084

DO - 10.1016/j.ceramint.2016.05.084

M3 - 文章

AN - SCOPUS:84969213517

SN - 0272-8842

VL - 42

SP - 13047

EP - 13052

JO - Ceramics International

JF - Ceramics International

IS - 11

ER -

Microstructure and thermal properties of nanostructured gadolinia doped yttria-stabilized zirconia thermal barrier coatings produced by air plasma spraying

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Keywords

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