TY - GEN
T1 - Thermal conductivity of nanoporous YSZ thermal barrier coatings fabricated by EB-PVD
AU - Jang, Byung Koog
AU - Matsubara, Hideaki
PY - 2008/8/21
Y1 - 2008/8/21
N2 - ZrO2-4mol% Y2O3 (YSZ) coatings were deposited by EB-PVD. The YSZ coatings consist of porous-columnar structure containing nano pores and intercolumnar gaps between columnar grains. The laser flash method and differential scanning calorimeter were used to measure the thermal diffusivity and specific heat of the coated samples. The thermal conductivity of EB-PVD coatings decreased with increasing measuring temperature as well as porosity. The thermal conductivity of the coating layer alone was also calculated based on thermal diffusion results for the double layers specimens consisting of the combined coatings and substrate. The response function method was employed to obtain an accurate value for the thermal conductivity of the coatings layer. The thermal conductivity of coatings layer showed increasing tendency with increasing the coatings thickness.
AB - ZrO2-4mol% Y2O3 (YSZ) coatings were deposited by EB-PVD. The YSZ coatings consist of porous-columnar structure containing nano pores and intercolumnar gaps between columnar grains. The laser flash method and differential scanning calorimeter were used to measure the thermal diffusivity and specific heat of the coated samples. The thermal conductivity of EB-PVD coatings decreased with increasing measuring temperature as well as porosity. The thermal conductivity of the coating layer alone was also calculated based on thermal diffusion results for the double layers specimens consisting of the combined coatings and substrate. The response function method was employed to obtain an accurate value for the thermal conductivity of the coatings layer. The thermal conductivity of coatings layer showed increasing tendency with increasing the coatings thickness.
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M3 - Conference contribution
AN - SCOPUS:49549118674
SN - 9780470196342
T3 - Ceramic Engineering and Science Proceedings
SP - 115
EP - 123
BT - Advanced Ceramic Coatings and Interfaces II - A Collection of Papers Presented at the 31st International Conference on Advanced Ceramics and Composites
T2 - 31st International Conference on Advanced Ceramics and Composites
Y2 - 21 January 2007 through 26 January 2007
ER -