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Effect of the Dimensional Factor on Sintering Composites of the System W – Sc2O3

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Powder Metallurgy and Metal Ceramics Aims and scope

Abstract

The effect of adding fine scandium oxide (1, 5, and 10 vol.% in relation to the metal) on shrinkage kinetics during sintering of tungsten powder with an average particle size of 4 μm and 140 nm is studied. Specimens of coarse and fine powders are sintered at 1800-2000 and 1000-1200°C, respectively. The results obtained are explained on the basis of the Skorokhod structural model for composite mixtures that takes account of the dimensional factor of components and the level of the matrix microstructure. It is established that the lower the level of the latter and consequently the greater the level of the carcass formation, the greater is the effect of a slowdown in volumetric shrinkage with the same volume content of oxide addition.

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REFERENCES

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Authors and Affiliations

  1. Institute for Problems of Materials Science, National Academy of Sciences of Ukraine, ul. Krzhizhanovskogo 3, Kiev, Ukraine, 03142

    Olga I. Get'man, Valentina V. Panichkina & Valerii V. Skorokhod

Authors
  1. Olga I. Get'man
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  2. Valentina V. Panichkina
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  3. Valerii V. Skorokhod
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Get'man, O.I., Panichkina, V.V. & Skorokhod, V.V. Effect of the Dimensional Factor on Sintering Composites of the System W – Sc2O3 . Powder Metallurgy and Metal Ceramics 43, 236–241 (2004). https://doi.org/10.1023/B:PMMC.0000042456.70493.06

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  • DOI: https://doi.org/10.1023/B:PMMC.0000042456.70493.06

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