Compositional Dependence of Normal Spectral Emissivity of Molten Cu-Fe Alloy

Eita Shoji, Ryuji Takahashi, Shosei Isogai, Naoto Ito, Masaki Kubo, Takao Tsukada, Hiroyuki Fukuyama

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


Normal spectral emissivity of molten Cu-Fe alloy with different compositions was measured at the wavelength of 807 nm using an electromagnetic levitator superimposed with a static magnetic field, which is capable of producing accurate normal spectral emissivity data because the applied static magnetic field suppresses translational and surface oscillations of a levitated sample to consequently reduce measurement uncertainties. Cu-Fe alloy samples used in this study were Cu97Fe3, Cu93Fe7, Cu92Fe8, Cu90Fe10, Cu80Fe20, and Cu70Fe30. The strength of the static magnetic field and temperature ranged from 3.0 to 3.5 T and 1350 to 1750 K, respectively. The measured normal spectral emissivity indicated negligible temperature dependence in a wide temperature range. In contrast, the compositional dependence indicated a distinct tendency in which the emissivity increased markedly with the composition of Fe up to 10 at pct.

Original languageEnglish
Pages (from-to)2454-2458
Number of pages5
JournalMetallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science
Issue number5
Publication statusPublished - 2019 Oct 1

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry


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