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YBCO/IBAD/Inconel coated conductor with end-to-end critical current of 96 A at 75 K

Los Alamos. Materials Science and Technology. YBCO/IBAD/Inconel coated conductor with end-to-end critical current of 96 A at 75 K. STC: Superconductivity Technology Center. 7. 10. 6. 10. 5. 10. YBCO H(||)c (4K). YBCO H||c (75K). Critical Current Density (A/cm2). YBCO H||ab (75K). 4.

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YBCO/IBAD/Inconel coated conductor with end-to-end critical current of 96 A at 75 K

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  1. Los Alamos Materials Science and Technology YBCO/IBAD/Inconel coated conductor with end-to-end critical current of 96 A at 75 K STC: Superconductivity Technology Center

  2. 7 10 6 10 5 10 YBCO H(||)c (4K) YBCO H||c (75K) Critical Current Density (A/cm2) YBCO H||ab (75K) 4 BSCCO H||c (75K) 10 3 10 0 5 10 15 20 H(T) Field Dependence ofCritical Current Density

  3. 1.2 S a m p l e B t n C o m p r e s s i o n e 1.0 r r u C S a m p l e B 0.8 l a T e n s i o n a f t e r c i c o m p r e s s i o n t e s t t i r 0.6 C d e S a m p l e A z 0.4 i T e n s i o n l a m r 0.2 o N 0.0 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 S t r a i n ( % ) Bending Test @ 75 K

  4. Superconductivity Technology Center Los Alamos The Jc reduction above ~ 1.5 mm appears related to an increase in surface roughness with YBCO thickness ... 0.39 mm 1.5 mm 3.0 mm Jc = 0.6 MA/cm2 calc. Ic = 180 A/cm Jc = 2.3 MA/cm2 calc. Ic = 90 A/cm Jc = 1.5 MA/cm2 calc. Ic = 225 A/cm

  5. Rate of increase: 60 A/cm-width for each additional micron of superconductor thickness Superconductivity Technology Center Los Alamos Ion milling shows that a multilayer structure allows Ic to continue to increase at thickness levels above 1.5 mm 75 K -- Bridge dimensions: ~150 mm x 5 mm

  6. Silver contact YBCO Sm1Ba2Cu3O7-d CeO2 IBAD YSZ Inconel Superconductivity Technology Center Los Alamos Y123-Sm123 Multilayers Enabled Thicker Films with Higher Critical Currents Y- Sm-Y- Sm-Y multilayer YBCO thickness: ~1.1 mm SBCO thickness: ~ 0.2 mm Total thickness: 3.7 mm Jc: 1.1 MA/cm2 (75 K) Calculated Ic: 405 A/cm-width For comparison, Jc of a 3.7 mm YBCO single-layer: 0.4 MA/cm2 Bridge dimensions: ~ 200 mm x 5 mm

  7. 75 K -- bridges ~200 mm x 5 mm Superconductivity Technology Center Los Alamos Modified superconductor processes push the Ic well beyond the 200 A/cm-width “barrier” to over 500 A/cm Substrate: Inconel 625 with IBAD YSZ

  8. Los Alamos Superconductivity Technology Center IBAD MgO template forms at ~ 10 nm thickness - approximately 100 times thinner/faster than for IBAD YSZ Ic (75K) = 42 A IBAD texture evolution vs. thickness YBCO Y2O3 YSZ DF (deg.) Epi MgO IBAD MgO Si3N4 0.1 µm Inconel 625 Thickness (nm)

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