Thermal conductivity of ZrO2-4mol%Y2O3 thin coatings by pulsed thermal imaging method

Byung Koog Jang, Jiangang Sun, Seongwon Kim, Yoon Suk Oh, Sung Min Lee, Hyung Tae Kim

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Thin ZrO2-4mol% Y2O3 coatings were deposited onto ZrO2 substrates by electron beam-physical vapor deposition. The coated samples revealed a feather-like columnar microstructure. The main phase of the ZrO2-4mol% Y2O3 coatings was the tetragonal phase. To evaluate the influence of the coating's thickness on the thermal conductivity of thin ZrO2-4mol% Y2O3 coatings, the pulsed thermal imaging method was employed to obtain the thermal conductivity of the coating layer in the two-layer (coating and substrate) samples with thickness between 56 and 337μm. The thermal conductivity of the coating layer was successfully evaluated and compared well with those obtained by the laser flash method for similar coatings. The thermal conductivity of coatings shows an increasing tendency with an increase in the coating's thickness.

Original languageEnglish
Pages (from-to)57-62
Number of pages6
JournalSurface and Coatings Technology
Volume284
DOIs
Publication statusPublished - Dec 25 2015
Externally publishedYes

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Infrared imaging
Thermal conductivity
thermal conductivity
coatings
Coatings
Physical vapor deposition
Substrates
flash
Electron beams
tendencies
vapor deposition
electron beams
microstructure
Microstructure
Lasers

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

Cite this

Thermal conductivity of ZrO2-4mol%Y2O3 thin coatings by pulsed thermal imaging method. / Jang, Byung Koog; Sun, Jiangang; Kim, Seongwon; Oh, Yoon Suk; Lee, Sung Min; Kim, Hyung Tae.

In: Surface and Coatings Technology, Vol. 284, 25.12.2015, p. 57-62.

Research output: Contribution to journalArticle

Jang, Byung Koog ; Sun, Jiangang ; Kim, Seongwon ; Oh, Yoon Suk ; Lee, Sung Min ; Kim, Hyung Tae. / Thermal conductivity of ZrO2-4mol%Y2O3 thin coatings by pulsed thermal imaging method. In: Surface and Coatings Technology. 2015 ; Vol. 284. pp. 57-62.
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AU - Lee, Sung Min

AU - Kim, Hyung Tae

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AB - Thin ZrO2-4mol% Y2O3 coatings were deposited onto ZrO2 substrates by electron beam-physical vapor deposition. The coated samples revealed a feather-like columnar microstructure. The main phase of the ZrO2-4mol% Y2O3 coatings was the tetragonal phase. To evaluate the influence of the coating's thickness on the thermal conductivity of thin ZrO2-4mol% Y2O3 coatings, the pulsed thermal imaging method was employed to obtain the thermal conductivity of the coating layer in the two-layer (coating and substrate) samples with thickness between 56 and 337μm. The thermal conductivity of the coating layer was successfully evaluated and compared well with those obtained by the laser flash method for similar coatings. The thermal conductivity of coatings shows an increasing tendency with an increase in the coating's thickness.

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