Characterization of the thermal conductivity of EB-PVD ZrO 2-Y 2O 3 coatings with a pulsed thermal imaging method

Byungkoog Jang; J. G. Sun; S. W. Kim; Y. S. Oh; H. T. Kim

doi:10.1016/j.surfcoat.2012.06.055

Characterization of the thermal conductivity of EB-PVD ZrO ₂-Y ₂O ₃ coatings with a pulsed thermal imaging method

Byungkoog Jang, J. G. Sun, S. W. Kim, Y. S. Oh, H. T. Kim

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

6 Citations (Scopus)

Abstract

ZrO ₂-(2-8mol%)Y ₂O ₃ coatings were deposited on zirconia substrates by EB-PVD. The coated layer had a columnar microstructure with intercolumnar gaps between columnar grains. Nanosized pores could be observed around feather-like grains as well as inside the columnar grains. The main phase of all coated specimens was the tetragonal phase. However, the monoclinic and cubic phase of the second phase could be detected for ZrO ₂-2mol%Y ₂O ₃ coatings and ZrO ₂-(6-8mol%)Y ₂O ₃ coatings, respectively. The thermal conductivity of coatings was successfully evaluated with the pulsed thermal imaging method using a combined sample of coatings and a substrate. Both the thermal conductivity and heat capacity of Y ₂O ₃-doped ZrO ₂ coatings tended to decrease with increasing amounts of Y ₂O ₃.

Original language	English
Pages (from-to)	177-181
Number of pages	5
Journal	Surface and Coatings Technology
Volume	207
DOIs	https://doi.org/10.1016/j.surfcoat.2012.06.055
Publication status	Published - Aug 25 2012
Externally published	Yes

All Science Journal Classification (ASJC) codes

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

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10.1016/j.surfcoat.2012.06.055

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title = "Characterization of the thermal conductivity of EB-PVD ZrO 2-Y 2O 3 coatings with a pulsed thermal imaging method",

abstract = "ZrO 2-(2-8mol%)Y 2O 3 coatings were deposited on zirconia substrates by EB-PVD. The coated layer had a columnar microstructure with intercolumnar gaps between columnar grains. Nanosized pores could be observed around feather-like grains as well as inside the columnar grains. The main phase of all coated specimens was the tetragonal phase. However, the monoclinic and cubic phase of the second phase could be detected for ZrO 2-2mol%Y 2O 3 coatings and ZrO 2-(6-8mol%)Y 2O 3 coatings, respectively. The thermal conductivity of coatings was successfully evaluated with the pulsed thermal imaging method using a combined sample of coatings and a substrate. Both the thermal conductivity and heat capacity of Y 2O 3-doped ZrO 2 coatings tended to decrease with increasing amounts of Y 2O 3.",

author = "Byungkoog Jang and Sun, {J. G.} and Kim, {S. W.} and Oh, {Y. S.} and Kim, {H. T.}",

year = "2012",

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doi = "10.1016/j.surfcoat.2012.06.055",

language = "English",

volume = "207",

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journal = "Surface and Coatings Technology",

issn = "0257-8972",

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T1 - Characterization of the thermal conductivity of EB-PVD ZrO 2-Y 2O 3 coatings with a pulsed thermal imaging method

AU - Jang, Byungkoog

AU - Sun, J. G.

AU - Kim, S. W.

AU - Oh, Y. S.

AU - Kim, H. T.

PY - 2012/8/25

Y1 - 2012/8/25

N2 - ZrO 2-(2-8mol%)Y 2O 3 coatings were deposited on zirconia substrates by EB-PVD. The coated layer had a columnar microstructure with intercolumnar gaps between columnar grains. Nanosized pores could be observed around feather-like grains as well as inside the columnar grains. The main phase of all coated specimens was the tetragonal phase. However, the monoclinic and cubic phase of the second phase could be detected for ZrO 2-2mol%Y 2O 3 coatings and ZrO 2-(6-8mol%)Y 2O 3 coatings, respectively. The thermal conductivity of coatings was successfully evaluated with the pulsed thermal imaging method using a combined sample of coatings and a substrate. Both the thermal conductivity and heat capacity of Y 2O 3-doped ZrO 2 coatings tended to decrease with increasing amounts of Y 2O 3.

AB - ZrO 2-(2-8mol%)Y 2O 3 coatings were deposited on zirconia substrates by EB-PVD. The coated layer had a columnar microstructure with intercolumnar gaps between columnar grains. Nanosized pores could be observed around feather-like grains as well as inside the columnar grains. The main phase of all coated specimens was the tetragonal phase. However, the monoclinic and cubic phase of the second phase could be detected for ZrO 2-2mol%Y 2O 3 coatings and ZrO 2-(6-8mol%)Y 2O 3 coatings, respectively. The thermal conductivity of coatings was successfully evaluated with the pulsed thermal imaging method using a combined sample of coatings and a substrate. Both the thermal conductivity and heat capacity of Y 2O 3-doped ZrO 2 coatings tended to decrease with increasing amounts of Y 2O 3.

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JO - Surface and Coatings Technology

JF - Surface and Coatings Technology

SN - 0257-8972

ER -

Characterization of the thermal conductivity of EB-PVD ZrO ₂-Y ₂O ₃ coatings with a pulsed thermal imaging method

Abstract

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