Stress/strain dependence of critical current in Nb3Sn superconducting wires stabilized with Cu–Nb microcomposites – effect of Nb content

✍ Scribed by K Kasaba; K Katagiri; Y Shoji; T Takahashi; K Watanabe; K Noto; K Goto; T Saito; O Kono

• Publisher: Elsevier Science
• Year: 2001
• Tongue: English
• Weight: 280 KB
• Volume: 41
• Category: Article
• ISSN: 0011-2275
• DOI: 10.1016/s0011-2275(01)00039-x

✦ Synopsis

The eects of niobium content in the Cu±Nb microcomposite on the mechanical property and the axial tensile or transverse compressive stress/strain characteristics of the critical current I c in a bronze processed Nb 3 Sn multi®lament superconducting wire with the Cu±Nb microcomposite were evaluated at a temperature of 4.2 K in a magnetic ®eld of 14 T. An increase in niobium content increases the 0.2% proof stress as well as both tensile and transverse compressive stress tolerance of I c of the wire. High yield stress value of the Cu±Nb microcomposite increases the strain at peak I c , e m , as well as the reversible strain limit of I c , e irr in the wire as compared to those in the Cu stabilized wire. An increase in niobium content in Cu±Nb microcomposite, however, decreases them due to decrease in the coecient of thermal expansion.