000119405 001__ 119405
000119405 005__ 20190228220116.0
000119405 0247_ $$2doi$$a10.1016/0011-2275(94)90065-5
000119405 022__ $$a0011-2275
000119405 02470 $$2ISI$$aA1994PJ84100004
000119405 037__ $$aARTICLE
000119405 245__ $$aDiameter-Dependent Critical-Current Densities for Superconducting Bi-2212/Ag Wires
000119405 260__ $$c1994
000119405 269__ $$a1994
000119405 336__ $$aJournal Articles
000119405 520__ $$aSuperconducting Bi-2212/Ag monocore wires of 0.65, 1.0, 1.2 and 1.5 mm diameter have been fabricated by the powder-in-tube method. The critical current densities increase with decreasing wire diameters. For short specimens of 0.65 mm diameter, maximum critical current densities of up to 120 000 A cm(-2) (B = 0) and 40 000 A cm(-2) (B = 12T) have been achieved at 4.2 K. For wires of 1.5 mm diameter the scatter in critical current data is approximate to 10% within groups of specimens heat treated together. For the thinner wires this scatter is more pronounced. The heat treatment conditions leading to the highest critical current densities have been found to depend on the wire diameter. An increasing thickness of the silver sheath may be responsible for a retarded release of oxygen from the core before the superconductor is partially molten. Evidence for grain alignment in a thin layer at the interface to the silver of typically 10-20 mu m thickness has been found by scanning electron microscopy. A model which explains the observed scaling behaviour of the critical current density with the wi re diameter has been developed. Using this model the critical current density in the interfacial region can be estimated.
000119405 700__ $$0240064$$g106730$$aWesche, R.
000119405 700__ $$aFuchs, A. M.
000119405 700__ $$aJakob, B.
000119405 700__ $$aPasztor, G.
000119405 773__ $$j34$$tCryogenics$$k10$$q805-811
000119405 909CO $$pSB$$particle$$ooai:infoscience.tind.io:119405
000119405 909C0 $$pCRPP
000119405 909C0 $$0252028$$pSPC$$xU12272$$xU12268$$xU10558$$xU10635$$xU12266$$xU10636$$xU10137$$xU12270$$xU10557$$xU12273$$xU10559$$xU12271$$xU12269$$xU12267$$xU10136
000119405 937__ $$aCRPP-ARTICLE-1994-002
000119405 973__ $$rREVIEWED$$sPUBLISHED$$aEPFL
000119405 980__ $$aARTICLE