Powder metallurgically processed composite-core Nb/sub 3/Sn wires, a novel type with filaments containing controlled amounts of normal conducting inclusions elongated in the wire axis, e.g., Ta or NbTi, have recently been developed. Composite cores replace the Nb cores, which are inserted either in a CuSn or in a Cu matrix for producing wires by the bronze route or by the internal Sn diffusion process, respectively. The ductile inclusions are deformed during the wire drawing process to long ribbons being>
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Flükiger et al. (1989) studied this question.
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