Practical superconductor development for electrical power applications - annual report for FY 2003. Page: 3 of 78
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Contents
A bstract..................................................................................................................... 1
1 Introduction....................................................................................................... 1
2 Technical Progress in 2002-2003......................................................................... 1
2.1) Y-Ba-Cu-O Coated Conductors................................................................... 2
2.1.1) Conductors with Standard ISD-MgO Architecture.......................... 2
2.1.1a) ISD -M gO Process............................................................................... 2
2.1.ib) Performance of Standard ISD-MgO Conductors ................................. 4
2.1.ic) Texture Development/Crystallography of Standard ISD Conductors... 7
2.1.2) Conductors with SrRuO3(SRO)-Buffered ISD MgO Architecture.... 11
2.1.2a) Initial Study of Feasibility ................................................................. 11
2.1.2b) Study of SRO-Buffered MgO Single-Crystal Substrates .................... 15
2.1.2c) SRO-Buffered ISD-MgO Substrates .................................................. 23
2.1.3) Direct Deposition of YBCO on Ag Alloy Substrates ......................... 27
2.1.4) Raman Microscopy of Coated Conductors........................................ 30
2.1.4a) Studies Probing Applicability of Raman Microscopy........................ 30
2.1.4b) Basic Features of Raman Microscopy Relevant to YBCO.................. 40
2.1.4c) Raman Microscopy for Examining YBCO Precursor Evolution....... 43
2.1.5) Oxygen Doping of YBCO Grain Boundaries..................................... 53
2.1.6) Mechanical Properties of Coated Conductors................................... 60
2.1.6a) Strain Tolerance of YBCO in ISD-Based Conductors ....................... 60
2.1.6b) Residual Stress Evaluation................................................................ 62
2.2) Bi-Sr-Ca-Cu-O Conductor
Modifications to Thermal Slide Heat Treatment of Bi-2223 Conductors ... 62
References.................................................................................................................. 65
Patents: FY 2000-FY 2003..................................................................................... 66
Publications: FY 2003.............................................................................................. 67iii
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Balachandran, U.; Baurceanu, R.; Clauss, H.; Dorris, S. E.; Emerson, J. E.; Erck, R. A et al. Practical superconductor development for electrical power applications - annual report for FY 2003., report, October 18, 2004; Argonne, Illinois. (https://digital.library.unt.edu/ark:/67531/metadc786322/m1/3/?rotate=90: accessed April 26, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.