Diffusion in tungsten silicides

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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Synthesis of Molybdenum and Tungsten Silicides Nanopowders from Ionic Melts

Springer Proceedings in Physics - Nanooptics and Photonics, Nanochemistry and Nanobiotechnology, and Their Applications ◽

10.1007/978-3-030-52268-1_22 ◽

2020 ◽

pp. 273-281

Author(s):

Arkadii Tretiakov ◽

Angelina Gab ◽

Tetiana Lukashenko ◽

Viktor Malyshev ◽

Marcelle Gaune-Escard

Keyword(s):

Ionic Melts ◽

And Tungsten ◽

Tungsten Silicides

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Effect of Ar Gas Pressure on Phase Separation of Tungsten Silicides Intermetallic Compound In Situ Self-Propagating High Temperature Synthesis-Casting Process

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.626.143 ◽

2012 ◽

Vol 626 ◽

pp. 143-146 ◽

Cited By ~ 2

Author(s):

Tawat Chanadee ◽

Sutham Niyomwas ◽

Jessada Wannasin

Keyword(s):

Phase Separation ◽

High Temperature ◽

Intermetallic Compound ◽

Gas Pressure ◽

Oxide Ceramic ◽

Temperature Synthesis ◽

High Temperature Synthesis ◽

Ar Gas ◽

Tungsten Silicides

Tungsten silicides intermetallic compound (WSi2) was synthesized in-situ by self-propagating high temperature synthesis-casting of WO3-Si-Al system in Ar gas environment. It is proposed that the extent of phase separation between oxide ceramic and intermetallic compound depends on the reaction temperature that made a lower viscosity and longer lifetime of the melted. The effects of inert gas pressure on densification of the intemetallic product were investigated.

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Vaporization thermodynamics of the tungsten silicides

Journal of Alloys and Compounds ◽

10.1016/0925-8388(93)90543-v ◽

1993 ◽

Vol 202 (1-2) ◽

pp. 225-229 ◽

Cited By ~ 6

Author(s):

Robert J. Kematick

Keyword(s):

Tungsten Silicides

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