Static stress effects in superconducting composites Part II. Effect of uniaxial tensile and compressive stresses on critical temperatures of Cu-Nb, Cu-NbTi, and bronze-Nb_3Sn composites

摘要

Effect of uniaxial tensile and compressive stresses on critical temperatures T_(cm) (midpoint of the transition curve) of superconducting composites (in situ formed Cu-Nb, and Cu-NbTi and bronze-Nb_3Sn industrial wires were studied. Results obtained for Cu-Nb T_(cm) are qualitatively similar to those for the composite resistive critical field H_r, presented in the first part of this paper Again, average derivative dT_(cm)/d#sigma# for the Cu-Nb composite (as well as its dH_r/d#sigma#) exceeds the respective value for pure Nb by about an order of magnitude. This and other results of the study are discussed.