Self-Propagating High-Temperature Synthesis Metallurgy of Cast W–C–Co Ceramics
| Autor: | S. L. Silyakov, V. I. Yukhvid |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Exothermic reaction Materials science General Chemical Engineering Metals and Alloys Self-propagating high-temperature synthesis Analytical chemistry chemistry.chemical_element 02 engineering and technology 021001 nanoscience & nanotechnology Combustion 01 natural sciences Carbide Inorganic Chemistry chemistry Aluminium Phase (matter) visual_art 0103 physical sciences Materials Chemistry Melting point visual_art.visual_art_medium Ceramic 0210 nano-technology |
| Zdroj: | Inorganic Materials. 56:1193-1197 |
| ISSN: | 1608-3172 0020-1685 |
| Popis: | 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) WO3/Al/Ca/C and (2) Co3O4/Al. We show that, during synthesis in a reactor under a nitrogen pressure, the mixture is capable of burning at any WO3/Al/Ca/C and Co3O4/Al ratios and that the combustion temperature exceeds the melting point of the combustion products (W–C–Co and Al2O3) 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). |
| Databáze: | OpenAIRE |
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