Fatigue Properties of IBAD-MOCVD REBa2Cu3O7-x
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Mbaruku et al.(TASC Vol.18, 2008)
Barth et al. SUST Vol.28 (2015)
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0.5% SP
0.35% SuNAM
0.35% SP
0.45% SuNAM
0.45% SP
0.5% SuNAM
0.5% SP
Cycles
S. Rogers W.K. Chan & J. Schwartz, submitted SUST 2016
5
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S. Rogers W.K. Chan & J. Schwartz, submitted SUST 2016
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S. Rogers W.K. Chan & J. Schwartz, submitted SUST 2016
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S. Rogers W.K. Chan & J. Schwartz, submitted SUST 2016
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S. Rogers W.K. Chan & J. Schwartz, submitted SUST 2016
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•! Delamination most often
occurs in buffer stack for both
craters and cracked surface
•! Important to note area of
failure to improve mechanical
properties
S. Rogers W.K. Chan & J. Schwartz, submitted SUST 2016
10
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Delamination has occurred at the edge of tape where microcracks originated
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•! EDS confirmed YBCO layer has delaminated, exposing buffer stack
•! Crack propagation from the conductor edge inwards at ~41o
•! Crater defects are visible and have cracks ranging in length from 10- 45 mm
S. Rogers W.K. Chan & J. Schwartz, submitted SUST 2016
11
SuNAM SEM
As-received
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1000 cycles @ 0.5% ; 0.91 I/Ic
•! Etching damage seen
•! Can still see the ends of the edge cracks
•! Cracks end ~80-100 "m from edge of tape
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