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

Journal Article · Tue Dec 01 00:00:00 EST 2015 · Surface and Coatings Technology

DOI:https://doi.org/10.1016/j.surfcoat.2015.09.065· OSTI ID:1344544

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

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 337 micrometers. 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.

• Research Organization: Argonne National Lab. (ANL), Argonne, IL (United States)
• Sponsoring Organization: USDOE Office of Fossil Energy (FE)
• DOE Contract Number: AC02-06CH11357
• OSTI ID: 1344544
• Journal Information: Surface and Coatings Technology, Vol. 284, Issue C; ISSN 0257-8972
• Publisher: Elsevier
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
Y2O3
ZrO2
electron beam-physical vapor deposition
pulsed thermal imaging method
thermal conductivity