Deposition of niobium and zirconium carbides with vapor -gas phase circulation in a closed circuit
| Autor: | V. F. Funke, V. A. Shevchenko, V. S. Makeev, A. N. Pilyugin, A. I. Tyutyunnikov |
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| Rok vydání: | 1976 |
| Předmět: |
Zirconium
Materials science Inorganic chemistry Metals and Alloys Niobium chemistry.chemical_element Condensed Matter Physics Methane Carbide Zirconium carbide chemistry.chemical_compound chemistry Chemical engineering Mechanics of Materials Materials Chemistry Ceramics and Composites Deposition (phase transition) Niobium carbide Carbon |
| Zdroj: | Soviet Powder Metallurgy and Metal Ceramics. 15:452-455 |
| ISSN: | 1573-9066 0038-5735 |
| Popis: | 1. A study was made of the effects of temperature and methane concentration on the rate of deposition of NbC and ZrC in an apparatus with a continuously circulating vapor-gas mixture consisting of a metal chloride, methane, hydrogen, and argon. 2. It is shown that in the temperature range 900–1100°C niobium carbide is deposited containing no free carbon. At a temperature of 1600°C and a methane:zirconium-tetrachloride volume concentration ratio below 0.7 zirconium carbide is deposited containing no free carbon. 3. An experimental apparatus, Kontur-1, has been constructed and tested which enables niobium and zirconium carbides to be deposited in a closed circuit with vapor-gas phase circulation. |
| Databáze: | OpenAIRE |
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