Abstract
<para xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <formula formulatype="inline"><tex Notation="TeX">${\rm MgB}_{2}$</tex> </formula> single-filament tapes and wires with Monel/Nb sheath were produced by the Powder in Tube (PIT)—technique using MA <emphasis emphasistype="boldital">in-ex situ</emphasis> powder. This powder prepared by mechanical alloying (MA) of Mg and B was finally reacted to <formula formulatype="inline"><tex Notation="TeX">${\rm MgB}_{2}$</tex></formula> at 700<formula formulatype="inline"><tex Notation="TeX">$^{\circ}{\rm C}$</tex></formula>. The amount of <formula formulatype="inline"><tex Notation="TeX">${\rm MgB}_{2}$</tex></formula> after annealing was about 91 wt%. Additionally 9 wt% MgO secondary phase was found. The primary crystallite size was about 25 nm. </para>
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