Delamination behavior of Gd123 coated conductor fabricated by PLD

N. Sakai, S. Lee, N. Chikumoto, T. Izumi, K. Tanabe

研究成果: Article査読

26 被引用数 (Scopus)

抄録

We have studied delamination behavior of GdBa2Cu 3O7-d (Gd123) coated conductors fabricated by pulsed laser deposition. Two kinds of delamination tests, transverse tensile test and four points bending test, were performed. The delamination strength of 8 and 4-7 MPa was obtained by transverse tensile test, and interfacial cohesive energy of 7.1 and 5.9 J/m2 was obtained by four points bending test for samples fabricated with different processing rates, 20 m/h and 60 m/h, respectively. EPMA and XPS analyses of delaminated surfaces showed that the weakest position in Gd123 coated conductor was inside of Gd123 layer a few nm apart from Gd123/CeO2 interface. The samples exhibiting a lower interfacial energy had a large gradient in oxygen distribution at the interface. The reason why the delamination occurred there is due to strain concentration induced from both lattice mismatch and inhomogeneous oxygen distribution at the interface.

本文言語English
ページ(範囲)1075-1079
ページ数5
ジャーナルPhysica C: Superconductivity and its applications
471
21-22
DOI
出版ステータスPublished - 2011 11
外部発表はい

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学
  • エネルギー工学および電力技術
  • 電子工学および電気工学

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