Advertisement

Journal of Materials Science

, Volume 41, Issue 23, pp 8017–8024 | Cite as

Oxidation behavior of molten magnesium in air/HFC-134a atmospheres

  • Hukui Chen
  • Jianrui Liu
  • Weidong Huang
Article

Abstract

The oxidation behavior of molten magnesium in the atmosphere of air containing HFC-134a has been investigated in the temperature range of 660–760 °C. The oxidation rates and kinetics have been measured by the weight gain method and oxidation products have been characterized by XRD, SEM, EDS, XPS and AES. The results show that the oxidation kinetics is complex which cannot be described by simple equations. The rate of oxidation of molten magnesium in air/HFC-134a covering gas mixtures varies with the concentration of HFC-134a and molten temperature. Increasing the concentration of HFC-134a and decreasing the temperature can slow down the oxidation rate of molten magnesium. The film formed +on the surface of molten magnesium is mainly composed of MgF2, MgO and C. MgF2 is predominant product at the top layer and decreased gradually with the depth while MgO and C remain almost constant with relatively low content. The mechanisms of the oxidation of molten magnesium in air containing HFC-134a have also been discussed based on the experimental results.

Keywords

Surface Film Auger Electron Spectroscopy MgF2 Energy Dispersive Spectrum Rapid Weight Gain 

References

  1. 1.
    Fruehling JW (1970) PhD thesis, The University of MichiganGoogle Scholar
  2. 2.
    Erickson SC, King JF, Mellerud T (1998) Foundry Manag Technol 126:38Google Scholar
  3. 3.
    Gjestland H, Westengen H, Plahte S (1996) In: Proceedings of the third international magnesium conference. The Institute of Materials, p 33Google Scholar
  4. 4.
    Ricketts NJ, Cashion SP (2001) In: Magnesium technology 2001. The Minerals, Metals and Materials Society, p 31Google Scholar
  5. 5.
    Wang X-L, Haraikawa N, Suda S (1995) J Alloys Compd 231:397CrossRefGoogle Scholar
  6. 6.
    Yao HB, Li Y, Wee ATS (2000) Appl Surf Sci 158:112CrossRefGoogle Scholar
  7. 7.
    Moulder JF, Stickle WF, Sobol PE, Bomben KD, Chastain J (1992) Handbook of X-ray photoelectron spectroscopy. Physical Electronics Division, Perkin-ElmerGoogle Scholar
  8. 8.
    Salas O (1991) J Mater Res 6:1964CrossRefGoogle Scholar
  9. 9.
    Hu Z (1990) Foundry techniques and quality controlling of aluminum and Magnesium alloys. Aviation Industry Press, Beijing, p 1990Google Scholar
  10. 10.
    Hillis JE (2002) In: International conference on SF6 and the environment: emission reduction strategies. IMAGoogle Scholar
  11. 11.
    Du Pont Fluorochemicals, MSDS number 6001FR, April 12, 1996Google Scholar
  12. 12.
    Pettersen G, Øvrelid E, Tranell G, Fenstad J, Gjestland H (2002) Mater Sci Eng A332:285CrossRefGoogle Scholar
  13. 13.
    Cashion SP (1998) PhD thesis. The University of Queensland, AustraliaGoogle Scholar
  14. 14.
    Czerwinski F (2002) Acta Materialia 50:2639CrossRefGoogle Scholar
  15. 15.
    Zayan MH (1990) Oxid Met 34:465CrossRefGoogle Scholar
  16. 16.
    Zeng X, Wang Q, Lu Y, Ding W, Zhu Y, Zhai C, Lu C, Xu X (2001) Mater Sci Eng A301:154CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media, LLC 2006

Authors and Affiliations

  1. 1.State Key Laboratory of Solidification ProcessingNorthwestern Polytechnical UniversityXi’anP.R. China

Personalised recommendations