Determination of thermal diffusivity/conductivity of oxide scale formed on steel plate by laser flash method through thermal effusivity measurement by transient hot-strip method

Rie ENDO, Hiroki HAYASHI, Mu LI, Megumi AKOSHIMA, Hikaru OKADA, Hiroshi TANEI, Miyuki HAYASHI, Masahiro SUSA

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

Thermal diffusivity and conductivity were determined for oxide scale formed on steel plate by the laser flash method in combination with thermal effusivity measurement by the transient hot-strip method. The thermal effusivity measurement technique was confirmed by measurement of silica glass, and the value was determined to be 2.52 kJ m-2 s-1/2 K-1 for the oxide scale formed on an ultra-low-carbon steel plate by oxidation in air at 900°C for 3 600 s. Thermal diffusivity measurements were also conducted for 1 mm-thick steel plates oxidized in air at 900°C for 770-3 600 s by the laser flash method. The apparent thermal diffusivity of samples provided the thermal diffusivity of the oxide scale based on three-layered analysis by inputting the measured value of the thermal effusivity. The measured values suggested that no significant boundary resistance exists between the oxide scale and the steel plate. The thermal conductivity and diffusivity of the oxide scale were calculated to be 1.6 W m-1 K-1 and 4.0 × 10-7 m2 s-1, respectively.

Original languageEnglish
Pages (from-to)2773-2779
Number of pages7
JournalISIJ International
Volume60
Issue number12
DOIs
Publication statusPublished - 2020 Dec 15
Externally publishedYes

Keywords

  • Fe1 - xO scale
  • Oxide scale
  • Thermal conductivity
  • Thermal diffusivity
  • Thermal effusivity

ASJC Scopus subject areas

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

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