Self-Propagating High-Temperature Synthesis Metallurgy of Cast W–C–Co Ceramics

— Experimental data are reported that demonstrate the feasibility of producing cast W–C–Co carbide ceramics using a thermite-type highly exothermic mixture consisting of two components: (1) WO 3 /Al/Ca/C and (2) Co 3 O 4 /Al. We show that, during synthesis in a reactor under a nitrogen pressure, the...

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Bibliographic Details
Published in:Inorganic materials 2020-11, Vol.56 (11), p.1193-1197
Main Authors: Silyakov, S. L., Yukhvid, V. I.
Format: Article
Language:English
Subjects:
Aluminum oxide
Ceramics
Chemical composition
Chemistry
Chemistry and Materials Science
Cobalt oxides
Combustion products
Combustion temperature
Exothermic reactions
Industrial Chemistry/Chemical Engineering
Inorganic Chemistry
Materials Science
Melting points
Metallurgy
Self propagating high temperature synthesis
Tungsten oxides
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Summary:— Experimental data are reported that demonstrate the feasibility of producing cast W–C–Co carbide ceramics using a thermite-type highly exothermic mixture consisting of two components: (1) WO 3 /Al/Ca/C and (2) Co 3 O 4 /Al. We show that, during synthesis in a reactor under a nitrogen pressure, the mixture is capable of burning at any WO 3 /Al/Ca/C and Co 3 O 4 /Al ratios and that the combustion temperature exceeds the melting point of the combustion products (W–C–Co and Al 2 O 3 ) in a wide composition range. Varying the ratio of compositions 1 and 2 and the percentages of carbon and aluminum in the starting mixture makes it possible to control the chemical and phase compositions and structure of the required cast material (W–C–Co).
ISSN:0020-1685
1608-3172
DOI:10.1134/S002016852011014X