Preparation of nickel substrates for coated conductors

T. G. Truchan, F. I.I. Rountree, M. T. Lanagan, S. M. McClelian, D. J. Miller, K. C. Goretta

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Abstract

Polycrystalline NI has been used as a substrate for highcurrent, coated YBajCujOj superconductors. For many conductors, Ni Is rolled to large deformation and annealed to produce a cube texture. In this study, Nl was rolled to >95% reduction and annealed in 5% H2/95% He at 3001000°C for various times. The resulting substrates were examined by scanning electron microscopy, Xray and electron diffraction, and surface Interferomctry. Key determinations for the Nl were extent of inplane and outofplane texture, surface smoothness, and grain size. The extent of texture was approximately Independent of annealing temperature and increased slightly with annealing time. Annealing at temperatures >600C increased surface roughness, primarily due to grainboundary grooving. Grain growth was fastest at 1000°C and was proportional to time to the 0.1 power.

Original languageEnglish (US)
Number of pages1
JournalIEEE Transactions on Applied Superconductivity
Volume10
Issue number1
StatePublished - Mar 1 2000

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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    Truchan, T. G., Rountree, F. I. I., Lanagan, M. T., McClelian, S. M., Miller, D. J., & Goretta, K. C. (2000). Preparation of nickel substrates for coated conductors. IEEE Transactions on Applied Superconductivity, 10(1).