Axial Tensile Strain/Transverse Compressive Stress Characteristics in High Strength Nb_3Sn Superconducting Wires(High Field Superconductors)

概要

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In order to improve the strain/stress characteristics of the critical current I_c, the availability of Nb matrix as well as the external CuNb reinforcing stabilizer to bronze processed Nb_3Sn multifilamentary superconducting wires has been examined up to the magnetic field of 14T and at a temperature of 4.2K. Although the axial tensile strain sensitivity of I_c does not change, the strain for peak I_c as well as the reversible strain limit increase in the wire with CuNb reinforcing stabilizer. Furthermore, the transverse compressive stress sensitivity of I_c decreases and the reversible stress limit increases. Although critical current density is not high, the Nb matrix Nb_3Sn wire shows higher tolerance to stress/strain. Correlation between axial strain effect and transverse compressive stress effect is briefly discussed.Nb_3Sn superconducting wireStrain effecttransverse stress effectcritical currentreinforcement
東北大学の論文
1996-07-15