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 and V.V. Medkov J. Phys. Colloques, 45 C1 (1984) C1-407-C1-411 DOI: 10.1051/jphyscol:1984183