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http://dx.doi.org/10.6111/JKCGCT.2012.22.1.051

Fabrication and structural observation of amorphous V-Co alloy by mechanical alloying  

Lee, Chung-Hyo (Dept. of Advanced Materials Science and Engineering, Mokpo National University)
Publication Information
Journal of the Korean Crystal Growth and Crystal Technology / v.22, no.1, 2012 , pp. 51-56 More about this Journal
Abstract
In the present study, we investigated the effect of mechanical alloying (MA) on the formation of amorphous VCo system through solid state reaction during ball milling. Two types of powder samples, ${\sigma}$-VCo intermetallic compound and $V_{50}Co_{50}$ powder mixture, were applied as a starting materials. With increasing milling time, a structural characteristics into the amorphous state is distinctly observed from the structural factor and radial distribution by X-ray diffraction. Amorphization has been observed in all two types of samples after the milling for 120 hrs. DSC spectrum of $V_{50}Co_{50}$ powder sample milled for 60 hrs indicates a sharp exothermic peak from the crystallization at $600^{\circ}C$. The structure factor, S(Q) and radial distribution function, RDF(r), observed by X-ray diffraction gradually change into a structure characteristic of an amorphous state with increasing MA time.
Keywords
Mechanical alloying; V-Co amorphous alloy; ${\sigma}$-VCo intermetallic compound; Structure factor; Radial distribution function;
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