Dynamic surface tension behavior of liquid iron during carburization and decarburization processes

Hiroyuki Fukuyama, Keisuke Morohoshi, Masahito Uchikoshi, Minoru Isshiki

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

A new technique to study the kinetics of the carburization and decarburization processes of liquid iron is proposed. A liquid iron droplet was electromagnetically levitated in a CO-CO2gas mixture during carburization and decarburization, and its surface oscillation was continuously recorded using a high-speed camera. The surface tension varied depending on each elementary step in the carburization and decarburization processes. This behavior was caused by transient adsorption and desorption of oxygen on the surface of the liquid iron accompanied by CO and CO2gases. The kinetics of the carburization process were discussed and the conclusion was drawn that the desorption rate of oxygen adatoms in the form of CO2was predominantly controlled by the gas-phase mass transfer.

Original languageEnglish
Pages (from-to)2109-2114
Number of pages6
JournalIsij International
Volume54
Issue number9
DOIs
Publication statusPublished - 2014

Keywords

  • Carburization
  • Decarburization
  • Electromagnetic levitation
  • Gas-liquid equilibrium
  • Liquid iron
  • Oscillating droplet method
  • Surface tension

ASJC Scopus subject areas

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

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