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Effect of the granulometric properties of metallic scandium powder on its conductivity

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Abstract

The influence of the granulometric properties of powdered metal on the density dependence of its conductivity is studied by the example of metallic scandium. It is found that a decrease in the grain size leads to an increase in the compression force necessary to rupture oxide films at the sites of grain contact and thereby carry the powder to the conducting state. It is shown that this force correlates with the content of scandium oxide forming a film on the grain surface. When the grain size range expands, the conductivity critical index decreases substantially because of an increase in the density of a conducting percolation cluster formed by the contacting metallic bases of the grains.

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Authors and Affiliations

  1. Russian Federal Nuclear Center, All-Russia Research Institute of Experimental Physics (VNIIEF), Sarov, Nizhegorodsk oblast, 607188, Russia

    M. V. Tsarev & V. V. Mokrushin

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  1. M. V. Tsarev
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  2. V. V. Mokrushin
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Original Russian Text © M.V. Tsarev, V.V. Mokrushin, 2007, published in Zhurnal Tekhnicheskoĭ Fiziki, 2007, Vol. 77, No. 3, pp. 80–86.

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Tsarev, M.V., Mokrushin, V.V. Effect of the granulometric properties of metallic scandium powder on its conductivity. Tech. Phys. 52, 369–375 (2007). https://doi.org/10.1134/S1063784207030152

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  • DOI: https://doi.org/10.1134/S1063784207030152

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