Production of magnesium diboride wires

The present disclosure relates to a method of manufacturing a wire comprising MgB2 wire, where the method comprises the following steps, (a) providing a substantially tubular component having a lengthwise cavity, the tubular component being provided as a preform comprising compacted amorphous Boron powder, (b) providing a Magnesium-comprising component, (c) forming a composite billet by inserting the Magnesium-comprising component into the cavity of the tubular component, and by inserting the tubular component into an outer container such that the outer container surrounds the first tubular component, (d) performing a plastic deformation treatment of the composite billet to produce a deformed wire having a cross-section with predetermined wire cross-section dimension(s), (e) heating the deformed wire by thermal treatment to a temperature above the melting point of Mg.