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|Type:||Artigo de evento|
|Title:||Critical Current Degradation Of Bi-2223 Composite Tapes Induced Bycyclic Deformation And Fatigue-related Effects|
Carvalho Jr. F.J.H.
Ruppert Filho E.
|Abstract:||Application of high temperature superconductor Bi2Sr 2Ca2Cu3Ox (Bi-2223) compound embedded in an Ag matrix requires the knowledge of critical current as a function of mechanical properties. Commercial tapes available in different types have been developed in industrial production scale in which a combination of small diameter filaments, long tape lengths and a ductile matrix results in a conductor with low crack formation and good tolerance against strain. The measurement of critical current and the evaluation of n-index from V-I characteristic curves of Bi-2223/Ag composite tapes subjected to an initial bending strain as a function of number of thermal cycles were done for two types of Bi-2223/Ag composite tapes: with and without steel tape reinforcement. The results showed that tapes with reinforcement presented small critical current degradation as a function of the number of thermal cycles whereas tapes without reinforcement exhibited steadily critical current degradation caused by the propagation of cracks. The n-index followed the same critical current behavior. © 2006 IEEE.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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