COMPOSITION, STRUCTURE AND CURRENT CARRYING CAPACITY OF Nb3Sn PHASE IN MULTIFILAMENT SUPERCONDUCTORS A.D. Nikulin, A.K. Shikov, A.I. Skvortsov, V.S. Sergeev, I.I. Davydov, V.A. Kovaleva, E. Yu. Klimenko, V.S. Kruglov, O.V. Malafeeva et V.V. Medkov J. Phys. Colloques, 45 C1 (1984) C1-407-C1-411 DOI: 10.1051/jphyscol:1984183