Journal of Materials Science

, Volume 30, Issue 24, pp 6209–6217 | Cite as

Thermal debinding of Fe3Al-X metal powder compacts

  • I. Majewska-Glabus
  • L. Zhuang
  • R. Vetter
  • J. Duszczyk


The process of removing a multicomponent binder from a metal powder compact has been investigated. Model experiments of debinding were performed on compounds consisting of less than 40 vol% binders (low molecular weight polyethylene, paraffin and Carnauba waxes) and more than 60 vol% metal content. As typical representatives for injection moulding morphology and meeting all other requirements for optimal powder characteristics, elemental powders of the Fe-Al system were used. Viscosity results over a wide range of shear rates for various plastisols are presented as functions of binder system composition and metal powder content. Based on the rheological response, an optimization of plastisol formulation was performed. Results are reported on three series of debinding modes using heat and fluid wicking in air and in nitrogen. The time dependence of fractional debinding, x(t), during wicking has been estimated using a model. Direct observation by SEM of binder distribution and pore structure evolution at different stages of the debinding process was made. Wick-assisted thermal debinding in nitrogen proved to be an effective debinding method in terms of shape preservation and the absence of defects in the studied material.


Shear Rate Injection Moulding Elemental Powder Binder System System Composition 
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  1. 1.
    P. Calvert and M. Cima, J. Am. Ceram. Soc. 73 (1990) 575.CrossRefGoogle Scholar
  2. 2.
    G. C. Stangle and I. A. Aksay, Chem. Eng. Sci. 45 (1990) 1719.CrossRefGoogle Scholar
  3. 3.
    J. R. Gasperovich and R. C. Drewes, Int. J. Powder Metall. 27(2) (1991) 169.Google Scholar
  4. 4.
    S. T. Lin and R. M. German, Powder Metall Int. 21(5) (1989) 10.Google Scholar
  5. 5.
    C. W. Finn, Int. J. Powder Metall 27(2) (1991) 127.Google Scholar
  6. 6.
    K. S. Hwang and K. H. Lin, ibid. 28(4) (1992) 357.Google Scholar
  7. 7.
    H. H. Angermann, F. K. Yang and van der Biest, J. Mater. Sci. 27 (1992) 2534.CrossRefGoogle Scholar
  8. 8.
    C. G. McKamey, J. H. DeVan, P. F. Tortorelli and V. K. Sikka, J. Mater. Res. 6 (1991) 1779.CrossRefGoogle Scholar
  9. 9.
    R. M. German, “Powder Injection Molding” (Metal Powder Industries Federation, Princetown, NJ, 1990).Google Scholar
  10. 10.
    K. F. Hens, in “Proceedings of the Intensive course on MIM”, Technical University Delft, The Netherlands (1992) p. 3–1.Google Scholar
  11. 11.
    M. Vogel, “Nichtmetalle in Metallen” (D. Hischfeld, Munster, Deutche Gesellschaft fur Metallkunde, Oberursel, 1987) p. 197.Google Scholar
  12. 12.
    I. Majewska-Glabus, “Plastisol formulation with Fe3Al-X intermetallics for injection moulding”, Technical report, Delft University of Technology, Laboratory for Material Science. Delft, The Netherlands (1990).Google Scholar
  13. 13.
    I. Majewska-Glabus, L. Zhuang, R. Vetter and J. Duszczyk, in “Proceedings of High Temperature Intermetallics” (The Royal Society, London, 1991) p. 162.Google Scholar
  14. 14.
    H. Zhang, R. M. German and A. Bose, Int. J. Powder Metall 26(3) (1990) 217.Google Scholar
  15. 15.
    K. F. Hens, S. T. Lin, R. M. German and D. Lee, J. Metals 41(8) (1989) 17.Google Scholar
  16. 16.
    M. Sanders, Master Thesis, Delft University of Technology, Delft, The Netherlands (1991).Google Scholar
  17. 17.
    R. M. German, Int. J. Powder Metall 23(4) (1987) 237.Google Scholar
  18. 18.
    R. Vetter, M. Sanders, I. Majewska-Glabus, L. Z. Zhuang and J. Duszczyk, J. Powder Metall, in press.Google Scholar

Copyright information

© Chapman & Hall 1995

Authors and Affiliations

  • I. Majewska-Glabus
    • 1
  • L. Zhuang
    • 1
  • R. Vetter
    • 1
  • J. Duszczyk
    • 1
  1. 1.Laboratory of Material ScienceDelft University of TechnologyAL DelftThe Netherlands

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