Viscosities of Fe-Ni, Fe-Co and Ni-Co binary melts

Yuzuru Sato, Koji Sugisawa, Daisuke Aoki, Tsutomu Yamamura

Research output: Contribution to journalArticlepeer-review

80 Citations (Scopus)


Viscosities of three binary molten alloys consisting of the iron group elements, Fe, Ni and Co, have been measured by using an oscillating cup viscometer over the entire composition range from liquidus temperatures up to 1600 °C with high precision and excellent reproducibility. The viscosities measured showed good Arrhenius linearity for all the compositions. The viscosities of Fe, Ni and Co as a function of temperature are as follows: log η = -0.6074 + 2493/T for Fe log η = -0.5695 + 2157/T for Ni log η = -0.6620 + 2430/T for Co. The isotherma l viscosities of Fe-Ni and Fe-Co binary melts increase monotonically with increasing Fe content. On the other hand, in Ni-Co binary melt, the isothermal viscosity decreases slightly and then increases with increasing Co. The activation energy of Fe-Co binary melt increased slightly on mixing, and those of Fe-Ni and Ni-Co melts decreased monotonically with increasing Ni content. The above behaviour is discussed based on the thermodynamic properties of the alloys.

Original languageEnglish
Pages (from-to)363-371
Number of pages9
JournalMeasurement Science and Technology
Issue number2
Publication statusPublished - 2005 Jan 1


  • Fe-Co and Ni-Co binary melts
  • Viscosities of Fe-Ni

ASJC Scopus subject areas

  • Instrumentation
  • Engineering (miscellaneous)
  • Applied Mathematics


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