We have fabricated high strength and conductivity Cu-Nb micro-composites by bundling and drawing process. We study the thermal stability of Cu-18vol. %Nb composites for high pulsed magnet use. The evolution of the Nb filaments in the composites during heat treatments is observed by scanning electron microscopy. The mechanism of edge spheroidization and cylinderization phenomenon for Nb filaments is discussed. The changes in mechanical and electrical properties of the Cu-Nb composites resulting from heat treatments are measured. The treatment effect on the properties of the composites with a different size of the Nb filaments is discussed.
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Liang et al. (2011) studied this question.
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