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A method of determination of the high-temperature viscosity of highly dispersed tungsten-copper composites

  • Methods of Investigation and Properties of Powder Materials
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Soviet Powder Metallurgy and Metal Ceramics Aims and scope

Conclusions

A method is proposed making it possible to investigate the kinetics of the change in shear viscosity of porous bodies during sintering independently of the kinetics of shrinkage.

The kinetics of the change during liquid-phase sintering in the shear viscosity of a highly dispersed tungsten-copper composite containing 20 vol.% copper is investigated. The viscosity of the composite increases linearly in relation to sintering time, which under conditions of locally nonuniform flow of the two-phase material is caused by diffusion growth of the refractory grains according to a cubic rule.

In the area of high and medium porosity the results obtained with the use of the proposed method and from the kinetics of shrinkage on the basis of the general rheological theory of sintering agree with each other.

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Literature cited

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Authors and Affiliations

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

    V. V. Skorokhod & N. K. Prokushev

Authors
  1. V. V. Skorokhod
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  2. N. K. Prokushev
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Translated from Poroshkovaya Metallurgiya, No. 6(294), pp. 79–82, June, 1987.

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Skorokhod, V.V., Prokushev, N.K. A method of determination of the high-temperature viscosity of highly dispersed tungsten-copper composites. Powder Metall Met Ceram 26, 499–502 (1987). https://doi.org/10.1007/BF00812181

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  • DOI: https://doi.org/10.1007/BF00812181

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