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Preparation of nickel substrates for coated conductors.

DE2001768570

Publication Date	2000
Personal Author	Truchan, T. G.; Rountree, F. H.; Lanagan, M. T.; McClellan, S. M.; Miller, D. J.
Page Count	7
Abstract	Polycrystalline Ni has been used as a substrate for high-current, coated YBa(sub 2)Cu(sub 3)O(sub x) superconductors. For many conductors, Ni is rolled to large deformation and annealed to produce a cube texture. In this study, Ni was rolled to greater than 95% reduction and annealed in 5% H(sub 2)/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 greater than 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.
Keywords	Nickel Substrates High-tc superconductors Annealing Grain growth Grain size Texture Yttrium oxides Barium oxides Copper oxides
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Argonne National Lab., IL.; Department of Energy, Washington, DC.
Document Type	Conference Proceedings
NTIS Issue Number	200125
Contract Number	W-31-109-ENG-38

Preparation of nickel substrates for coated conductors.

Preparation of nickel substrates for coated conductors.
DE2001768570

Publication Date	2000
Personal Author	Truchan, T. G.; Rountree, F. H.; Lanagan, M. T.; McClellan, S. M.; Miller, D. J.
Page Count	7
Abstract	Polycrystalline Ni has been used as a substrate for high-current, coated YBa(sub 2)Cu(sub 3)O(sub x) superconductors. For many conductors, Ni is rolled to large deformation and annealed to produce a cube texture. In this study, Ni was rolled to greater than 95% reduction and annealed in 5% H(sub 2)/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 greater than 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.
Keywords	Nickel Substrates High-tc superconductors Annealing Grain growth Grain size Texture Yttrium oxides Barium oxides Copper oxides
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Argonne National Lab., IL.; Department of Energy, Washington, DC.
Document Type	Conference Proceedings
NTIS Issue Number	200125
Contract Number	W-31-109-ENG-38