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The influence of an electric field on the mechanism of combustion synthesis of tungsten silicides

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Abstract

The synthesis of tungsten silicides by self-propagating combustion has been successfully accomplished under the influence of an electric field. Materials with starting composition ranging from 6 to 30 wt. % Si were investigated by the method of field-activated combustion synthesis (FACS). A threshold field value was required to initiate a self-sustaining wave; the threshold value depended on composition. It was shown that the level of the applied field can influence the mechanism of silicide formation. The silicide W5Si3 could be formed only at relatively high field values while WSi2 can be formed at any field. The effect of the field on the silicide formation is discussed in terms of its role in liquid phase formation.

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Author notes

  1. S. Gedevanishvili (Visiting scientist)

    Present address: F. Tavadze Institute of Metallurgy, Academy of Sciences of the Georgian Republic, Al. Kazbegy Avenue 15, 380060, Tibilisi, Georgia

Authors and Affiliations

  1. Department of Chemical Engineering and Materials Science, University of California, Davis Davis, California, 95616-5294, USA

    S. Gedevanishvili (Visiting scientist) & Z. A. Munir

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  1. S. Gedevanishvili
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  2. Z. A. Munir
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Gedevanishvili, S., Munir, Z.A. The influence of an electric field on the mechanism of combustion synthesis of tungsten silicides. Journal of Materials Research 10, 2642–2647 (1995). https://doi.org/10.1557/JMR.1995.2642

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  • DOI: https://doi.org/10.1557/JMR.1995.2642

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