Skip to main content
SpringerLink
Log in

Effect of palladium on the process of diffusional alloy formation and microstructure during the sintering of tungsten-rhenium powders with well-developed surfaces

  • Theory and Technology of Sintering, Thermal, and Chemicothermal Treatment Processes
  • Published:
Soviet Powder Metallurgy and Metal Ceramics Aims and scope

Conclusions

Low-temperature coreduction of tungsten trioxide and ammonium perrhenate can be employed as a means of preparing active tungsten-rhenium powders having well-developed surfaces and good sinterability. The action of an alloy formation activator manifests itself most strongly with active powders produced by the method of low-temperature coreduction of tungsten trioxide and ammonium perrhenate. Diffusional reaction between the tungsten and rhenium in such a case begins already during the reduction process. At temperatures of intense alloy formation phase interlayers of activator solid solutions form at grain boundaries in tungsten-rhenium alloys. As a result, the diffusional permeability of the boundaries to rhenium atoms grows, which activates the process of diffusional alloy formation.

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. V. V. Skorokhod, V. V. Panichkina, and L. I. Shnaiderman, “Effect of palladium on shrinkage and diffusional interaction during the sintering of tungsten and rhenium powders,” Dopovidy Akad. Nauk Ukr. SSR, Ser. A, No. 5, 469–472 (1975).

    Google Scholar 

  2. V. V. Skorokhod, S. M. Solonin, L. I. Chernyshev, L. L. Kolomiets, and L. I. Shnaiderman, “Activating effect of small additions of Group VIII metals on alloy formation during the sintering of tungsten and molybdenum powders mixed with other refractory metals,” Poroshk. Metall., No. 6, 21–25 (1976).

    Google Scholar 

  3. I. V. Uvarova, V. V. Panichkina, and L. D. Konchakovskaya, “Low-temperature reduction of molybdenum and tungsten oxides,” Izv. Akad. Nauk SSSR, Met., No. 4, 86–91 (1972).

    Google Scholar 

  4. V. V. Skorokhod, “Effect of nonequilibrium vacancies on the recovery and deformation kinetics of distorted metal crystals,” Poroshk. Metall., No. 2, 57–62 (1968).

    Google Scholar 

  5. E. M. Savitskii, V. P. Polyakova, and N. A. Tylkina, Palladium Alloys [in Russian], Nauka, Moscow (1967).

    Google Scholar 

Download references

Author information

Authors and Affiliations

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

    L. I. Shnaiderman & V. V. Skorokhod

Authors
  1. L. I. Shnaiderman
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. V. V. Skorokhod
    View author publications

    You can also search for this author in PubMed Google Scholar

Additional information

Translated from Poroshkovaya Metallurgiya, No. 1(205), pp. 36–40, January, 1980.

Rights and permissions

Reprints and permissions

About this article

Cite this article

Shnaiderman, L.I., Skorokhod, V.V. Effect of palladium on the process of diffusional alloy formation and microstructure during the sintering of tungsten-rhenium powders with well-developed surfaces. Powder Metall Met Ceram 19, 27–30 (1980). https://doi.org/10.1007/BF00798158

Download citation

  • Received:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF00798158

Keywords

Search

Navigation