Thermal conductivity of EB-PVD ZrO2-4 mol% Y2O 3 films using the laser flash method

Byung Koog Jang, Yoshio Sakka, Norio Yamaguchi, Hideaki Matsubara, Hyung Tae Kim

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)

Abstract

The variation in thermal conductivity and thermal diffusivity of ZrO 2-4 mol% Y2O3 coatings deposited onto Inconel substrates by EB-PVD is examined as a function of coating thickness using the laser flash method. The coatings are found to consist of columnar grains with a feather-like microstructure. The thermal conductivities of the coatings are calculated using two methods: the first involves separating the coating from the substrate and measuring the thermal diffusivity directly; the second uses thermal diffusion results from coatings still attached to the substrate and is based on the response function method. The results of both methods are in excellent agreement, and show that the thermal conductivities of the coatings increase with increasing coating thickness. The results also confirm that the double layer method can be used successfully to calculate the thermal conductivities of thin film coatings.

Original languageEnglish
Pages (from-to)1045-1049
Number of pages5
JournalJournal of Alloys and Compounds
Volume509
Issue number3
DOIs
Publication statusPublished - 2011 Jan 21

Keywords

  • Electron beam-physical vapor deposition
  • Laser flash method
  • Thermal conductivity
  • Zirconia

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

Fingerprint Dive into the research topics of 'Thermal conductivity of EB-PVD ZrO<sub>2</sub>-4 mol% Y<sub>2</sub>O <sub>3</sub> films using the laser flash method'. Together they form a unique fingerprint.

Cite this