Skip to main content
SpringerLink
Log in

Properties of molybdenum powders obtained by reduction in moving beds

  • Theory, Production Technology, and Properties of Powders and Fibers
  • Published:
Powder Metallurgy and Metal Ceramics Aims and scope

Abstract

We have studied the process of decomposition of ammonium paramolybdate and reduction of the molybdenum oxides in moving beds with rotation of the working chamber. We have shown that agglomerated disperse molybdenum powders are formed under these conditions. Movement of powder beds during reduction ensures continuous contact between the oxides being reduced and the hydrogen, rapid removal of water vapor from the reaction zone, and establishment of nearly kinetic reduction conditions. As a result the metallic molybdenum powders are strong, highly porous agglomerates, similar to the MoO3 particles in size and shape. The powders have high bulk (as-poured) density and good flowability, and their dispersity depends only on the reduction temperature.

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

References

  1. V. V. Skorokhod, V. V. Panichkina, Yu. M. Solonin, and I. V. Uvarova,Disperse Powders of Refractory Metals [in Russian], Nauk. Dumka, Kiev (1979).

    Google Scholar 

  2. V. V. Skorokhod, I. D. Fridberg, and V. V. Panichkina, “Effect of the degree of the microstructure regularity of a powdered porous solid on its densification during sintering,”Poroshk. Metall., No. 9, 15–21 (1985).

    Google Scholar 

  3. V. V. Panichkina, “Feasibility of using disperse powders for obtaining sintered high-density materials,”Zhurn. Vses. Khim. Obshch. im. D. I. Mendeleeva,36, No. 2, 170–174 (1991).

    CAS  Google Scholar 

  4. Yu. V. Gostev, V. V. Panichkina, I. L. Pasholok, and N. I. Filippov, “Transformation of the porous structure of compacts of disperse tungsten powders in the initial stages of sintering,”Poroshk. Metall., No. 3, 23–26 (1991).

    Google Scholar 

Download references

Authors
  1. P. Ya. Radchenko
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. V. V. Panichkina
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. O. G. Radchenko
    View author publications

    You can also search for this author in PubMed Google Scholar

Additional information

Institute for Problems of Materials Science, Ukraine National Academy of Sciences, Kiev. Translated from Poroshkovaya Metallurgiya, Nos. 9–10(409), pp. 1–9, September–October, 1999.

Rights and permissions

Reprints and permissions

About this article

Cite this article

Radchenko, P.Y., Panichkina, V.V. & Radchenko, O.G. Properties of molybdenum powders obtained by reduction in moving beds. Powder Metall Met Ceram 38, 429–435 (1999). https://doi.org/10.1007/BF02676054

Download citation

  • Received:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF02676054

Keywords

Search

Navigation