Skip to main content
SpringerLink
Log in

Structural and morphological investigations of an atomized iron powder

II. The “corallike” structure of iron powder particles and a possible mechanism of its formation

  • Published:
Soviet Powder Metallurgy and Metal Ceramics Aims and scope

Conclusions

The surfaces of the particles of a powder subjected to decarburizing-reducing annealing consist of masses of interwoven fibrous metallic formations, thanks to which the powder exhibits good compactibility. The fibrous formations have been found to have structural features suggesting that a gaseous phase participates in their growth. Material transfer is apparently effected by transport reactions. The transporting agent is carbon monoxide forming as a result of oxidation of carbon in the atomized particles by the oxygen of oxide phases during annealing. Growth of the fibrous formations is due to the carbonyl process, made possible by the structural features of the starting powder, which enable high gas pressures to be generated.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

Literature cited

  1. É. Ch. Pioro et al., “Properties of an atomized iron powder of branched particle shape,” Poroshk. Metall., No. 10, 1–7 (1984).

    Google Scholar 

  2. E. I. Givargizov, Growth of Whiskers and Lamellar Crystals from Vapor [in Russian], Nauka, Moscow (1977).

    Google Scholar 

  3. A. F. Zhornyak and V. E. Oliker, “Reduction and decarburization during the annealing of atomized iron-carbon alloy powders,” Poroshk. Metall., No. 2, 5–15 (1982).

    Google Scholar 

  4. O. A. Esin and P. V. Gel'd, Physical Chemistry of Pyrometallurgical Processes [in Russian], Gos. Nauchno-Tekh. Izd. Lit. Chern. Tsvetn. Metall., Sverdlovsk (1962).

    Google Scholar 

  5. A. Ya. Kipnis, Carbonyl Metallurgy [in Russian], Obshch. Znanie, Moscow (1973).

    Google Scholar 

  6. N. A. Beiozerskii, Metal Carbonyls [in Russian], Metallurgiya, Moscow (1958).

    Google Scholar 

  7. B. S. Styskin, B. I. Bondarenko, A. A. Sigov, et al., “Reduction and swelling kinetics of iron ore pellets,” Izv. Akad. Nauk SSSR, Met., No. 3, 69–73 (1974).

    Google Scholar 

  8. R. Wagner and W. Ellis, “Vapor-liquid-solid mechanism of single crystal growth,” Appl. Phys. Lett.,4, No. 89, 89–90 (1964).

    Google Scholar 

  9. B. G. Gribov, G. A. Domrachev, B. V. Zhuk, et al., Deposition of Films and Coatings by the Decomposition of Metal-Organic Compounds [in Russian], Nauka, Moscow (1981).

    Google Scholar 

  10. T. Gabor and J. Blocher, “In situ electron-microscopic study of the growth of iron whiskers by chemical vapor deposition,” J. Appl. Phys.,40, No. 7, 2696 (1969).

    Google Scholar 

  11. F. Eisenkolb, Advances in Powder Metallurgy [Russian translation], Metallurgiya, Moscow (1969).

    Google Scholar 

  12. I. M. Fedorchenko and R. A. Andrievskii, Principles of Powder Metallurgy [in Russian], Izd. Akad. Nauk Ukr. SSR, Kiev (1963).

    Google Scholar 

  13. Yu. P. Gorlov, N. F. Eremin, and B. U. Sedunov, Refractory and Heat Insulating Materials [in Russian], Stroiizdat, Moscow (1976).

    Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Institute of Materials Science, Academy of Sciences of the Ukrainian SSR, Ukraine

    N. Ch. Pioro, É. Ch. Pioro, A. G. Zherdin & V. P. Smirnov

Authors
  1. N. Ch. Pioro
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. É. Ch. Pioro
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. A. G. Zherdin
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. V. P. Smirnov
    View author publications

    You can also search for this author in PubMed Google Scholar

Additional information

Translated from Poroshkovaya Metallurgiya, No. 8 (272), pp. 16–22, August, 1985.

The authors wish to thank S. P. Gordienko for assistance with the mass-spectrometric investigation and E. I. Givargizov and S. M. Solonin for their interest in the work.

Rights and permissions

Reprints and permissions

About this article

Cite this article

Pioro, N.C., Pioro, É.C., Zherdin, A.G. et al. Structural and morphological investigations of an atomized iron powder. Powder Metall Met Ceram 24, 598–603 (1985). https://doi.org/10.1007/BF00791945

Download citation

  • Received:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF00791945

Keywords

Search

Navigation