Progress in Superconductivity

The Korean Superconductivity Society (한국초전도학회)
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Variation of Lattice Constant in Ni-W and Ni-W-Cu Alloys for YBCO Coated Conductor

YBCO 초전도 박막 선재용 Ni-W 및 Ni-W-Cu 합금의 격자상수 변화

  • Kim Min-Woo (Department of Nuclear Materials Development, Korea Atomic Energy Research and Institute, Department of Metallurgical Engineering, Chungnam National University) ;
  • Jung Kyu-Dong (KISWIRE. Ltd.) ;
  • Jun Byung-Hyuk (Department of Nuclear Materials Development, Korea Atomic Energy Research and Institute) ;
  • Kim Hyoung-Seop (Department of Metallurgical Engineering, Chungnam National University) ;
  • Kim Chan-Joong (Department of Nuclear Materials Development, Korea Atomic Energy Research and Institute)
  • Published : 2005.10.01
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Abstract

We fabricated Ni-based alloy substrates for YBCO coated conductor using powder metallurgy. Tungsten and copper were selected as alloy elements due to their mutual solubility to the base element of nickel. The alloying elements were mixed with nickel using ball milling and dried in air. The powder mixtures were packed in a rubber mold, cold isostatic pressed 200 MPa and made into rods. The compacted rods were sintered at $1150^{\circ}C$ for 6 hours for densification. It was confirmed by neutron diffraction experiment that W and Cu atoms made complete solid solution with Ni. Lattice constant of nickel alloy increased by $0.004{\AA}$ for 1at. $\%$ W in Ni-W alloy, $0.0006{\AA}$ for 1 at. $\%$ Cu in Ni-W-Cu alloy.

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