Abstract
Although Ni-W substrate with high W content (>5at.%) substrates have been developed successfully, the quality of cube texture and grain boundary, as well as extensive applications in coated conductors should be further improved. In the present work, once intermediate annealing treatment (IAT) at 500°C for 2 h has been employed to optimize the deformation and recrystallization textures in Ni-7at.%W (Ni7W) substrates. As a result, competitive high cube texture content (2Zr2O7 (GZO) buffer layer with strong cube texture and high-quality surface deposited successfully on the Ni7W substrate using the chemical solution deposition method, demonstrating the advanced GZO/Ni7W template is promising for coated conductors.
Highlights
Ni-W alloys are considered as the most promising substrate materials for high temperature superconducting YBa2Cu3O7−δ (YBCO) coated conductors in terms of rolling assisted biaxial textured substrates (RABiTS) technique [1] [2] [3]
A Gd2Zr2O7 (GZO) buffer layer with strong cube texture and high-quality surface deposited successfully on the Ni7W substrate using the chemical solution deposition method, demonstrating the advanced GZO/Ni7W template is promising for coated conductors
Gaitzsch et al reported that a sharp textured Ni-9.5at.%W substrate with cube texture content of 96% was achieved in terms of the intermediate annealing treatment (IAT) rolling technique [9]
Summary
Ni-W alloys are considered as the most promising substrate materials for high temperature superconducting YBa2Cu3O7−δ (YBCO) coated conductors in terms of rolling assisted biaxial textured substrates (RABiTS) technique [1] [2] [3]. Over 100-m-long Ni-5at.%W (Ni5W) flexible textured substrates have been prepared commercially, Ni-W substrates with high tungsten content (>5%) could provide higher strength and acceptable magnetic properties. The textured Ni-7~9.5at.%W (Ni7~9.5W) alloy substrates have been developed using both powder metallurgy [4] [5] and melting routes [6]-[14]. Since the reduction of stacking fault energy in Ni-W alloy with high tungsten additions, several specific rolling techniques, in particular, the intermediate annealing
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