Effect of melting state on the thermal shock resistance and thermal conductivity of APS ZrO2-7.5 wt.% Y2O3 coatings

Xuemei Song, Ziwei Liu, Tomi Suhonen, Tommi Varis, Liping Huang, Xuebin Zheng, Yi Zeng

Research output: Contribution to journalArticleScientificpeer-review

15 Citations (Scopus)

Abstract

The microstructures of two types of ZrO2-7.5 wt.% Y2O3 (YSZ) coatings fabricated by air plasma spraying (APS) but containing different amounts of columnar grains were investigated through scanning electron microscopy and electron backscatter diffraction analysis. Differences in the formation mechanisms of columnar and equiaxed grains were characterized using particles collected in a water container, from which it was found that these mechanisms are closely related to the melted state of the in-flight particles. Furthermore, it was found that the higher the columnar grain concentration of an as-sprayed coating, the higher its thermal shock resistance. This means that it is possible to improve the thermal shock resistance of APS YSZ coatings simply by introducing more columnar grains, as this increases their thermal conductivity. Using this knowledge, YSZ coatings with good thermal shock resistance and a thermal conductivity of 0.81 W·(m·K)- 1 at 1100 °C were successfully prepared.
Original languageEnglish
Pages (from-to)132-138
JournalSurface and Coatings Technology
Volume270
DOIs
Publication statusPublished - 2015
MoE publication typeA1 Journal article-refereed

Fingerprint

shock resistance
thermal shock
plasma spraying
Plasma spraying
Thermal shock
Thermal conductivity
Melting
thermal conductivity
yttria-stabilized zirconia
melting
coatings
Coatings
conductivity
air
Air
Sprayed coatings
Electron diffraction
sprayed coatings
Containers
containers

Keywords

  • air plasma spraying
  • YSZ coatings
  • columnar grains
  • thermal shock resistance
  • thermal conductivity
  • ProperPart
  • ProperTune

Cite this

Song, Xuemei ; Liu, Ziwei ; Suhonen, Tomi ; Varis, Tommi ; Huang, Liping ; Zheng, Xuebin ; Zeng, Yi. / Effect of melting state on the thermal shock resistance and thermal conductivity of APS ZrO2-7.5 wt.% Y2O3 coatings. In: Surface and Coatings Technology. 2015 ; Vol. 270. pp. 132-138.
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title = "Effect of melting state on the thermal shock resistance and thermal conductivity of APS ZrO2-7.5 wt.{\%} Y2O3 coatings",
abstract = "The microstructures of two types of ZrO2-7.5 wt.{\%} Y2O3 (YSZ) coatings fabricated by air plasma spraying (APS) but containing different amounts of columnar grains were investigated through scanning electron microscopy and electron backscatter diffraction analysis. Differences in the formation mechanisms of columnar and equiaxed grains were characterized using particles collected in a water container, from which it was found that these mechanisms are closely related to the melted state of the in-flight particles. Furthermore, it was found that the higher the columnar grain concentration of an as-sprayed coating, the higher its thermal shock resistance. This means that it is possible to improve the thermal shock resistance of APS YSZ coatings simply by introducing more columnar grains, as this increases their thermal conductivity. Using this knowledge, YSZ coatings with good thermal shock resistance and a thermal conductivity of 0.81 W·(m·K)- 1 at 1100 °C were successfully prepared.",
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author = "Xuemei Song and Ziwei Liu and Tomi Suhonen and Tommi Varis and Liping Huang and Xuebin Zheng and Yi Zeng",
year = "2015",
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Effect of melting state on the thermal shock resistance and thermal conductivity of APS ZrO2-7.5 wt.% Y2O3 coatings. / Song, Xuemei; Liu, Ziwei; Suhonen, Tomi; Varis, Tommi; Huang, Liping; Zheng, Xuebin; Zeng, Yi.

In: Surface and Coatings Technology, Vol. 270, 2015, p. 132-138.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Effect of melting state on the thermal shock resistance and thermal conductivity of APS ZrO2-7.5 wt.% Y2O3 coatings

AU - Song, Xuemei

AU - Liu, Ziwei

AU - Suhonen, Tomi

AU - Varis, Tommi

AU - Huang, Liping

AU - Zheng, Xuebin

AU - Zeng, Yi

PY - 2015

Y1 - 2015

N2 - The microstructures of two types of ZrO2-7.5 wt.% Y2O3 (YSZ) coatings fabricated by air plasma spraying (APS) but containing different amounts of columnar grains were investigated through scanning electron microscopy and electron backscatter diffraction analysis. Differences in the formation mechanisms of columnar and equiaxed grains were characterized using particles collected in a water container, from which it was found that these mechanisms are closely related to the melted state of the in-flight particles. Furthermore, it was found that the higher the columnar grain concentration of an as-sprayed coating, the higher its thermal shock resistance. This means that it is possible to improve the thermal shock resistance of APS YSZ coatings simply by introducing more columnar grains, as this increases their thermal conductivity. Using this knowledge, YSZ coatings with good thermal shock resistance and a thermal conductivity of 0.81 W·(m·K)- 1 at 1100 °C were successfully prepared.

AB - The microstructures of two types of ZrO2-7.5 wt.% Y2O3 (YSZ) coatings fabricated by air plasma spraying (APS) but containing different amounts of columnar grains were investigated through scanning electron microscopy and electron backscatter diffraction analysis. Differences in the formation mechanisms of columnar and equiaxed grains were characterized using particles collected in a water container, from which it was found that these mechanisms are closely related to the melted state of the in-flight particles. Furthermore, it was found that the higher the columnar grain concentration of an as-sprayed coating, the higher its thermal shock resistance. This means that it is possible to improve the thermal shock resistance of APS YSZ coatings simply by introducing more columnar grains, as this increases their thermal conductivity. Using this knowledge, YSZ coatings with good thermal shock resistance and a thermal conductivity of 0.81 W·(m·K)- 1 at 1100 °C were successfully prepared.

KW - air plasma spraying

KW - YSZ coatings

KW - columnar grains

KW - thermal shock resistance

KW - thermal conductivity

KW - ProperPart

KW - ProperTune

U2 - 10.1016/j.surfcoat.2015.03.011

DO - 10.1016/j.surfcoat.2015.03.011

M3 - Article

VL - 270

SP - 132

EP - 138

JO - Surface and Coatings Technology

JF - Surface and Coatings Technology

SN - 0257-8972

ER -