Effect of Aluminum and Oxygen Content on Diffusivity of Alurninum in Molten Iron.

• Kawakami Masahiro

  Toyohashi University of Technology

• Yokoyama Seiji

  Toyohashi University of Technology

• Takagi Kenji

  Graduate Course, Toyohashi University of Technology

• Nishimura Motohiko

  Graduate Course, Toyohashi University of Technology

• Kim Jeong-Sik

  Tokyo Research Laboratory

Abstract

The diffusivity of aluminum in molten iron has been obtained with the capillary reservoir method. It is given as<br><br>D (m²/s)=(1.00±0.11)×10^-6 exp(-81500/RT )   1823 to 1923 K<br><br>at lower oxygen content than 0.025 mass% and lower aluminum content than 1.4 mass%. If the oxygen content is higher, the diffusivity decreases apparently with the oxygen content. The effect of oxygen on aluminum diffusion is well interpreted by the counter current diffusion model. The effect of aluminum content is well expressed by the Darken's equation. <br><br>D =(N_AlD_Fe^S+N_FeD_Al^S)(1+_{d lnN<SUB>Al}</SUB>^{d lnγ_Al})<br><br>The self diffusivities of Fe and Al in the equation are obtained, respectively as<br><br>D_Fe^S(m²/s)=9.48×10^-4 exp(-145000/RT )<br>D_Al^S(m²/s)=1.54×10^-6 exp(-96000/RT )

Journal

• ISIJ International

  ISIJ International 37 (5), 425-431, 1997

  The Iron and Steel Institute of Japan

Keywords

• diffusivity of aluminum in molten iron
• capillary reservoir method
• effect of aluminum content
• effect of oxygen content
• self diffusivity of Fe
• self diffusivity of Al

Details

• CRID: 1390282681429875328
• NII Article ID: 10002455607
• NII Book ID: AA10680712
• DOI: 10.2355/isijinternational.37.425
• ISSN: 13475460
• ISSN: 09151559
• ISSN: http://id.crossref.org/issn/00211583
• Web Site: http://www.jstage.jst.go.jp/article/isijinternational1989/37/5/37_5_425/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed