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Synthesis of vanadium carbide by mechanical alloying
Ist Teil von
Journal of alloys and compounds, 2005-04, Vol.392 (1), p.183-186
Ort / Verlag
Lausanne: Elsevier B.V
Erscheinungsjahr
2005
Link zum Volltext
Quelle
Elsevier ScienceDirect Journals Complete
Beschreibungen/Notizen
Vanadium carbide was synthesized by ball milling V
2O
5, Mg and graphite powders at room temperature using a planetary ball mill. Characterization of the structural evolution during milling was carried out using X-ray diffractometry (XRD), scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDX). Experimental results indicate that the formation of vanadium carbide is a self-sustained reaction. The as-produced VC
x
(
x
<
1) has the same structure as VC. When VC
x
was annealed at a temperature higher than about 750
°C, it transforms into V
8C
7. The formation mechanism of vanadium carbide is discussed.