| Autor: |
Ronsheim, P., Toth, L. E., Mazza, A., Pfender, E., Mitrofanov, B. |
| Zdroj: |
Journal of Materials Science; October 1981, Vol. 16 Issue: 10 p2665-2674, 10p |
| Abstrakt: |
Chemical reactions which occur in a thermal plasma between fine powders of tungsten and graphite and between powdered tungsten and methane have been studied. When using a commercial d.c. torch and a standard reactor design, the conversion to tungsten carbide is relatively poor. With a specially designed reactor operating in a transferred-arc mode, nearly complete conversion to carbide results when operating at the same power level and with methane as a reactant. Crystal structures and particle morphologies have been studied with electron microscopy and X-ray diffraction. Several initial stages of the particle-particle and particle-gas reactions have been determined. A number of interesting composite particles corresponding to intermediate reaction steps has been observed. |
| Databáze: |
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| Externí odkaz: |
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