ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Influence of applied tensile and bending strains on the local and overall transport criticalcurrent Ic and n-value at 77 K of multifilamentary Bi2223-composite superconductor was studied,where the n-value refers to the sharpness of the transition from super- to normal conducting state.Under both tensile and bending strains, the damage such as transverse and longitudinal cracking ofthe Bi2223 filaments and interfacial debonding between the filament and silver progressed. Theextent of damage and accordingly the critical current was different among the local portions. Therelation of the local current and n-value to overall ones was analyzed with a voltage summationmodel, with which the experimental result was described well. Further analysis revealed that thedistribution of local critical current could be described by the Weibull distribution function andn-value could be expressed as a function of critical current. Based on these results, a Monte Carlosimulation was carried out to predict the overall critical current from the distribution of local criticalcurrent, with which the experimental results could be described
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/15/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.539-543.739.pdf
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