Thermal conductivity of nanoporous YSZ thermal barrier coatings fabricated by EB-PVD

Byung Koog Jang, Hideaki Matsubara

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

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.

Original languageEnglish
Title of host publicationAdvanced Ceramic Coatings and Interfaces II - A Collection of Papers Presented at the 31st International Conference on Advanced Ceramics and Composites
Pages115-123
Number of pages9
Volume28
Edition3
Publication statusPublished - 2008 Aug 21
Event31st International Conference on Advanced Ceramics and Composites - Daytona Beach, FL, United States
Duration: 2007 Jan 212007 Jan 26

Other

Other31st International Conference on Advanced Ceramics and Composites
CountryUnited States
CityDaytona Beach, FL
Period07/1/2107/1/26

ASJC Scopus subject areas

  • Ceramics and Composites

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    Jang, B. K., & Matsubara, H. (2008). Thermal conductivity of nanoporous YSZ thermal barrier coatings fabricated by EB-PVD. In Advanced Ceramic Coatings and Interfaces II - A Collection of Papers Presented at the 31st International Conference on Advanced Ceramics and Composites (3 ed., Vol. 28, pp. 115-123)