Phase Analysis of the Fe-C Nanopowder Prepared by Laser Pyrolysis

  • B. David
  • M. Vondráček
  • O. Schneeweiss
  • P. Bezdička
  • R. Alexandrescu
  • I. Morjan
Part of the NATO Science Series book series (NAII, volume 94)


Iron-carbide-based compounds and composites present a particular interest due to their structural and magnetic properties. Different carbide phases are known, such as the orthorombic cementite (Fe3C), the monoclinic Hägg carbide (Fe5C2), the hexagonal Fe2C. Another metastable phase Fe7C3 was synthesized only when the precursor iron oxides, contained small amounts of Ba [1]. A new class of nanopowder iron-carbide materials were synthesized in the past few years by Rice and coworkers [2,3] and by Ecklund and coworkers [4]. Both groups applied the method of laser pyrolysis from gas phase reactants [5], in which a powerful CW CO2 laser is used to heat a mixture of gases through the absorption of the laser radiation by at least one of the gas components. By using this technique, the production of other carbides and composites (like SiC, Si/C/N, TiC, Ti/Si/C) were reported [6,7]. The catalytic and magnetic properties of iron-based bulk materials could be highly enhanced if particles in the nanometer size were obtained. Using the laser induced pyrolysis of a sensitized system containing iron pentacarbonyl vapors, γ-Fe particles [8] and iron-oxide-based nanopowders [9] were recently reported. In a previous work we presented preliminary results on the synthesis of iron-carbide-based nanopowders by the laser pyrolysis of gas mixtures containing iron pentacarbonyl vapors and ethylene as carrier gas [10].


Mossbauer Spectroscopy Iron Carbide Rotary Pump Mossbauer Spectrum Thermomagnetic Curve 
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  1. 1.
    Tajima, S. and Hirano, S.-I. (1990) Synthesis and magnetic-properties of Fe7C3 particles with high saturation magnetization, Japanese Journal of Applied Physics 29, p. 662–668.ADSCrossRefGoogle Scholar
  2. 2.
    Fiato, R.A., Rice, G.W., Misco, S. and Soled, S.I. (1987) United States Patent, 4637753.Google Scholar
  3. 3.
    Rice, G.W., Fiato, R.A. and Soled, S.I. (1987) United States Patent, 4659681.Google Scholar
  4. 4.
    Bi, X.-X., Granguly, B., Huffman, G.P., Huggins, F.E., Endo, M. and Ecklund, P.C. (1993) Nanocrystalline alpha-Fe, Fe3C, and Fe7C3 produced by CO2-laser pyrolysis, Journal of Materials Research 8, p. 1666–1674.ADSCrossRefGoogle Scholar
  5. 5.
    Haggerty, J.S. and Steinfeld, J.I. (ed.) (1981) Laser-Induced Chemical Processes, Plenum Press, New York.Google Scholar
  6. 6.
    Borsella, E, Botti, S., Fantoni, R., Alexandrescu, R., Morjan, I., Popescu, I.C., Makris, T.D., Giorgio, R. and Enzo, S. (1992) Composite Si/C/N powder production by laser-induced gas-phase reactions, Journal of Materials Research 7, p. 2257–2268.ADSCrossRefGoogle Scholar
  7. 7.
    Alexandrescu, R., Borsella, E., Botti, S., Cesile, M.C., Martelli, S., Giorgi, R., Turtu, S. and Zappa, G. (1997) Synthesis of TiC and SiC/TiC nanocrystalline powders by gas-phase laser-induced reaction, Journal of Materials Science 32, p. 5629–5635.CrossRefGoogle Scholar
  8. 8.
    Zhao, X.Q., Zheng, F., Liang, Y., Hu, Z.Q. and Xu, Y.B, (1994) Preparation and characterization of single-phase beta-Fe-nanopowder from cw CO2-laser induced pyrolysis of iron pentacarbonyl, Materials Letters 21, p. 285–288.CrossRefGoogle Scholar
  9. 9.
    Alexandrescu, R., Huisken, F., Morjan, I., Ehbrecht, M, Kohn, B., Petcu, S. and Crunteanu, A. (1998) Iron-Oxide-Based Nanoparticles Produced by Pulsed Laser Pyrolysis of Fe(CO)5, Materials Chemistry and Physics 55/2, p. 115–121.CrossRefGoogle Scholar
  10. 10.
    Alexandrescu, R., Cojocaru, S., Crunteanu, A., Morjan, I., Voicu, I., Diamandescu, L., Vasiliu, F., Huisken, F., Kohn, B. (1999) Preparation of iron carbide and iron nanoparticles by laser-induced gas phase pyrolysis, J. Phys. IV France 9, Pr8-537-544.Google Scholar
  11. 11.
    Hochepied, J.F. (2001) Online Nanotechnologies Journal, vol.2(1), art 1.Google Scholar
  12. 12.
    Lewis, K.E., Golden, D. M. and Smith, G.P. (1984) Organometallic bond-dissociation energies — laser pyrolysis of Fe(CO)5, Cr(CO)6, Mo(CO)6, AND W(CO)6, Journal of American Chemical Society 106, p. 3905–3912.CrossRefGoogle Scholar
  13. 13.
    Alexandrescu, R., Cojocaru, C.S., Crunteanu, A., Morjan, I., Voicu, I., Huisken, F., Kohn, B., Vasiliu, F. and Fatu, D. (1998) Synthesis of iron-carbide-based nanopowders by laser photoinduced reactions from gaseous precursors in T.S. Sudarshan, K.A. Khor and M. Jeandin (eds.), Surface Modification Technologies XII, ASM International, Materials Park, Ohio, p. 463–470Google Scholar
  14. 14.
    ASTM 6-0502.Google Scholar
  15. 15.
    ASTM 7-0322.Google Scholar
  16. 16.
    Haneda, K. and Morrish, A.H. (1978) Surface Science 7, p. 584.CrossRefGoogle Scholar
  17. 17.
    Fender, B.E.F. and Riley, F.D. (1969) J. Phys. Client Solids 30, p. 793.ADSCrossRefGoogle Scholar
  18. 18.
    Akamatu, A. and Sato, K. (1949) Bull. Chem. Soc. Jpn. 22, p. 127.CrossRefGoogle Scholar
  19. 19.
    Kehrer, V.J. and Leidheiser, H. (1954) J. Phys. Chem. 58, p. 550.CrossRefGoogle Scholar
  20. 20.
    Žák, T. (1999) Confit for Windows 95 in M. Miglierini and D. Petridis (eds.), Mössbauer Spectroscopy in Materials Science, Kluwer Academic Publishers, Dordrecht, p. 385–390.Google Scholar
  21. 21.
    Cohen, R.L. (1980) Applications of Mössbauer Spectroscopy, volume II, Academic Press, New YorkGoogle Scholar
  22. 22.
    Greenwood, N.N. and Gibb, T.C. (1971) Mössbauer Spectroscopy, Chapmann and Hall Ltd., LondonCrossRefGoogle Scholar
  23. 23.
    Le Caer, G., Dubois, J.M., Pijolat, M., Perrichon, V. and Bussière, P. (1982) J. Phys. Chem. 86, p. 4799.CrossRefGoogle Scholar
  24. 24.
    Cohen, R.L. (1976) Applications of Mössbauer Spectroscopy, volume I, Academic Press, New YorkGoogle Scholar
  25. 25.
    Maddock, A.G. (1997) Mössbauer Speclroscopy, Principles and Application of the Techniques, Harwood Publishing, ChichesterGoogle Scholar
  26. 26.
    Greenwood, N.N. and Howe, A.T. (1972) J. Chem. Soc. Dalton Trans., p. 110.Google Scholar
  27. 27.
    JCPDSPDF-2 database, ICDD Newtown Square, PA, U.S.A. release 51, 2001.Google Scholar
  28. 28.
    ICSD database FIZ Karlsruhe, Germany, release 2002/1, 2002.Google Scholar

Copyright information

© Springer Science+Business Media Dordrecht 2003

Authors and Affiliations

  • B. David
    • 1
  • M. Vondráček
    • 1
  • O. Schneeweiss
    • 1
  • P. Bezdička
    • 2
  • R. Alexandrescu
    • 3
  • I. Morjan
    • 3
  1. 1.Institute of Physics of Materials ASCRCzech Republic
  2. 2.Institute of Inorganic Chemistry ASCRCzech Republic
  3. 3.National Institute for Lasers, Plasma and Radiation PhysicsRomania

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