Journal of Materials Science

, Volume 29, Issue 5, pp 1306–1309 | Cite as

Reaction mechanism for the formation of intermetallic compounds from layered Sm/Fe powder obtained by mechanical milling

  • Ming Tan


Solid-state reactions in layered Sm/Fe powder particles with an overall composition of Sm12Fe88, obtained by ball milling, have been investigated by X-ray diffraction. During annealing at 500‡C, one reaction, Sm+2Fe→SmFe2 was observed in the time-range studied. However, during annealing at 800‡C, five reactions were observed: Sm+2Fe→SmFe2, Sm +3Fe→SmFe3, 2Sm+17Fe→Sm2Fe17, 2SmFe2+13Fe→Sm2Fe17, and 2SmFe3 +11Fe→Sm2Fe17. It is proposed that such reactions occur by a nucleation and growth process. Reactions of samarium with iron can be governed by nucleation; Sm/Fe interfaces possessing a higher free energy per unit area can play an important role in the nucleation. The observed results are discussed.


Iron Polymer Free Energy Milling Unit Area 
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  1. 1.
    P. S. Gilman andJ. S. Benjamin,Ann. Rev. Mater. Sci. 13 (1983) 279.Google Scholar
  2. 2.
    C. C. Koch,Ann. Rev. Mater. Sci. 19 (1989) 121.Google Scholar
  3. 3.
    A. P. Radlinski andA. Calka,Mater. Sci. Eng. A134 (1991) 1376.Google Scholar
  4. 4.
    J. Wecker, M. Katter andL. Schultz,J. Appl. Phys. 69 (1991) 6058.Google Scholar
  5. 5.
    L. Schultz, J. Wecker andE. Hellstern,ibid. 61 (1987) 3583.Google Scholar
  6. 6.
    K. Schnitzke, L. Schultz, J. Wecker andM. Katter,Appl. Phys. Lett. 57 (1990) 2853.Google Scholar
  7. 7.
    A. R. Yavari, P. J. Desré andT. Benameur,Phys. Rev. Lett. 68 (1992) 2235.Google Scholar
  8. 8.
    C. Kuhrt, M. Katter, J. Wecker, K. Schnitzke andL. Schultz,Appl. Phys. Lett. 60 (1992) 2029.Google Scholar
  9. 9.
    F. E. Pinkerton andC. D. Fuerst,ibid. 60 (1992) 2558.Google Scholar
  10. 10.
    Ming Tan,Mater. Sci. Eng. B15 (1992) 105.Google Scholar
  11. 11.
    U. Gösele andK. N. Tu,J. Appl. Phys. 53 (1982) 3252.Google Scholar
  12. 12.
    D. A. Porter andK. E. Easterling, “Phase Transformations in Metals and Alloys” (Van Nostrand Reinhold, New York, 1981) Ch 3.Google Scholar
  13. 13.
    E. A. Brandes, “Smithells Metals Reference Book” (Butterworths, London, 1983) pp. 11–258.Google Scholar
  14. 14.
    Y. Otani, A. Moukarika, H. Sun, J. M. D. Coey, E. Devlin and I. R. Harris,J. Appl. Phys. 69 (1991) 6735.Google Scholar

Copyright information

© Chapman & Hall 1994

Authors and Affiliations

  • Ming Tan
    • 1
  1. 1.Institute of Solid State PhysicsAcademia SinicaAnhuiPeople's Republic of China

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