Nitrogen effect in mechanical alloying of immiscible Cu-V: Extended x-ray absorption fine structure study

Abstract

A mixture of pure metallic powders of Cu and V has been mechanically alloyed by ball milling in a nitrogen atmosphere instead of a conventional inert gas. A strongly disordered phase of Cu30V70-N was obtained, in spite of the immiscibility of Cu and V. The change of local structure around each atom was investigated by the extended x-ray absorption fine structure technique. It was found that a nitriding reaction proceeds in the crystalline Cu-V supersaturated solid solution, which is formed at the early stage.