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Coagulation of tungsten nanopowders under annealing in hydrogen

  • Nanostructured Materials and Functional Coatings
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Abstract

Coagulation of tungsten nanoparticles is investigated under annealing in hydrogen flow at 600–1000°C and duration of holding up to 1 h. It is established that the main mechanism of coagulation is the gasphase transport, and mass carriers are the WO3 · H2O molecules. Evaluative calculations of the coagulation rate are performed and their satisfactory agreement with experimental results is shown. Recommendations for optimization of conditions of thermal treatment of tungsten nanopowders are given.

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Authors and Affiliations

  1. Baikov Institute of Metallurgy and Material Science, Russian Academy of Sciences, Leninskii pr. 49, Moscow, 117334, Russia

    Yu. V. Blagoveshchenskii & G. M. Vold’man

  2. Lomonosov State Academy of Fine Chemical Technology, pr. Vernadskogo 86, Moscow, 119571, Russia

    Yu. V. Levinskii

Authors
  1. Yu. V. Blagoveshchenskii
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  2. Yu. V. Levinskii
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  3. G. M. Vold’man
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Additional information

Original Russian Text © Yu.V. Blagoveshchenskii, Yu.V. Levinskii, G.M. Vold’man, 2008, published in Izvestiya VUZ. Poroshkovaya Metallurgiya i Funktsional’nye Pokrytiya, 2008, No. 1, pp. 41–45.

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Blagoveshchenskii, Y.V., Levinskii, Y.V. & Vold’man, G.M. Coagulation of tungsten nanopowders under annealing in hydrogen. Russ. J. Non-ferrous Metals 49, 314–318 (2008). https://doi.org/10.3103/S1067821208040196

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  • DOI: https://doi.org/10.3103/S1067821208040196

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