NDLI: Simultaneous synthesis and densification of WSi$_{2}$ and WSi$_{2}$-20vol.%Nb composite by field-activated and pressure-assisted combustion

Content Provider	SpringerLink
Author	Shon, I. J. Rho, D. H. Kim, H. C.
Copyright Year	2000
Abstract	A method to simultaneously synthesize and consolidate the silicide WSi$_{2}$ and the composite WSi$_{2}$-20 vol.%Nb from W, Si, and Nb powders was investigated. Combustion synthesis was carried out under the combined effect of an electric field and mechanical pressure. The final density of the products increased nearly linearly with the applied pressure. Highly dense WSi$_{2}$ and WSi$_{2}$-20 vol.%Nb with relative densities of up to 97% were produced under the simultaneous application of a 60 MPa pressure and a 3000A current on the reactant powders. The percentages of the total shrinkage occurring before and during the synthesis reaction were 17 and 83% for the WSi$_{2}$, and 22 and 78% for the WSi$_{2}$-20 vol.% Nb. The respective Vickers microhardness values for these materials were 8.2 and 5.8 GPa. From indentation crack measurements, the fracture toughness values for WSi$_{2}$ and WSi$_{2}$-20 vol.%Nb were calculated to be 3.2 and 9.1 MPa m$^{12}$, respectively.
Starting Page	533
Ending Page	538
Page Count	6
File Format	PDF
ISSN	15989623
Journal	Metals and Materials
Volume Number	6
Issue Number	6
Language	English
Publisher	The Korean Institute of Metals and Materials
Publisher Date	2000-01-01
Publisher Place	Seoul
Access Restriction	Subscribed
Subject Keyword	combustion synthesis densification tungsten silicides composite electric field Metallic Materials Operating Procedures, Materials Treatment Magnetism, Magnetic Materials Engineering Thermodynamics, Heat and Mass Transfer Characterization and Evaluation of Materials Continuum Mechanics and Mechanics of Materials
Content Type	Text
Resource Type	Article
Subject	Materials Chemistry Condensed Matter Physics Metals and Alloys Mechanics of Materials

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