Preparation of nickel substrates for coated conductors

T. G. Truchan, F. H. Rountree, M. T. Lanagan, S. M. McClellan, D. J. Miller, K. C. Goretta, M. Tomsic, R. Foley

Research output: Contribution to journalConference articlepeer-review

9 Scopus citations

Abstract

Polycrystalline Ni has been used as a substrate for high-current, coated YBa2Cu3Ox superconductors. For many conductors, Ni is rolled to large deformation and annealed to produce a cube texture. In this study, Ni was rolled to >95% reduction and annealed in 5% H2/95% He at 300-1000 °C for various times. The resulting substrates were examined by scanning electron microscopy, X-ray and electron diffraction, and surface interferometry. Key determinations for the Ni were extent of in-plane and out-of-plane 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 >600 °C increased surface roughness, primarily due to grain-boundary grooving. Grain growth was fastest at 1000 °C and was proportional to time to the 0.1 power.

Original languageEnglish (US)
Pages (from-to)1130-1133
Number of pages4
JournalIEEE Transactions on Applied Superconductivity
Volume10
Issue number1
DOIs
StatePublished - 2000
EventThe 16th International Conference on Magnet Tehnolopgy - Tallahassee, FL, USA
Duration: Sep 26 1999Oct 2 1999

All Science Journal Classification (ASJC) codes

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

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