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–Nb3Sn composites Original Research Article

Effect of uniaxial tensile and compressive stresses on critical temperatures Tcm (midpoint of the transition curve) of superconducting composites (in situ formed Cu–Nb, and Cu–NbTi and bronze–Nb3Sn industrial wires were studied. Results obtained for Cu–Nb Tcm are qualitatively similar to those for the composite resistive critical field Hr, presented in the first part of this paper. Again, average derivative dTcm/dσ for the Cu–Nb composite (as well as its dHr/dσ) exceeds the respective value for pure Nb by about an order of magnitude. This and other results of the study are discussed.