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High critical current density YBa2Cu3O7δ thick films using ion beam assisted deposition MgO bi-axially oriented template layers on nickel-based superalloy substrates

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Abstract

Nickel-based superalloys have been coated with magnesium oxide (MgO) using ion-beam-assisted deposition (IBAD). This technique produced a well-oriented bi-axially textured MgO template layer with a Ф scan full width half maximum of 6.4°. The layer architecture for these samples was as follows: polished hastelloy C276/amorphous Si3N4/IBAD MgO/ pulsed laser deposited (PLD) Y2O3–ZrO2/PLD CeO2/PLD YBa2Cu3O7?δ. The subsequent heteroepitaxial PLD of 1.5-mm-thick YBCO showed a nominal critical current density of over 1 MA/cm2 (75 K, self-field) along a microbridge and had an in-plane mosaic spread of 4.8° and an out-of-plane spread of 1.3°. These results compare well with our earlier work using IBAD yttria-stabilized zirconia (YSZ) as a template layer and indicate that IBAD MgO is a suitable substitute. Furthermore, these results suggest that IBAD MgO could be adapted to and increase the feasibility of a continuous process to fabricate longer lengths of coated conductors at speeds 100 times faster than that previously realized with IBAD YSZ.

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Authors and Affiliations

  1. Materials Science and Technology Division, Los Alamos National Laboratory, 87545, Los Alamos, New Mexico, USA

    J. R. Groves, P. N. Arendt, S. R. Foltyn, Q. X. Jia, T. G. Holesinger, H. Kung, E. J. Peterson, R. F. De Paula, P. C. Dowden, L. Stan & L. A. Emmert

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  1. J. R. Groves
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  2. P. N. Arendt
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  3. S. R. Foltyn
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  4. Q. X. Jia
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  5. T. G. Holesinger
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  6. H. Kung
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  7. E. J. Peterson
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  8. R. F. De Paula
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  9. P. C. Dowden
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  10. L. Stan
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  11. L. A. Emmert
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Groves, J.R., Arendt, P.N., Foltyn, S.R. et al. High critical current density YBa2Cu3O7δ thick films using ion beam assisted deposition MgO bi-axially oriented template layers on nickel-based superalloy substrates. Journal of Materials Research 16, 2175–2178 (2001). https://doi.org/10.1557/JMR.2001.0295

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  • DOI: https://doi.org/10.1557/JMR.2001.0295

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