Delamination behavior of Gd123 coated conductor fabricated by PLD

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

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

We have studied delamination behavior of GdBa 2 Cu 3 O 7-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/m 2 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/CeO 2 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.

Original languageEnglish
Pages (from-to)1075-1079
Number of pages5
JournalPhysica C: Superconductivity and its applications
Volume471
Issue number21-22
DOIs
Publication statusPublished - 2011 Nov 1
Externally publishedYes

Fingerprint

Pulsed laser deposition
Delamination
interfacial energy
conductors
tensile tests
Bending tests
Interfacial energy
oxygen
Oxygen
Lattice mismatch
pulsed laser deposition
Electron probe microanalysis
gradients
X ray photoelectron spectroscopy
1-dodecylpyridoxal
Processing

Keywords

  • Delamination strength
  • Gd123 coated conductor
  • XPS

ASJC Scopus subject areas

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

Cite this

Delamination behavior of Gd123 coated conductor fabricated by PLD. / Sakai, Naomichi; Lee, S.; Chikumoto, N.; Izumi, T.; Tanabe, K.

In: Physica C: Superconductivity and its applications, Vol. 471, No. 21-22, 01.11.2011, p. 1075-1079.

Research output: Contribution to journalArticle

Sakai, Naomichi ; Lee, S. ; Chikumoto, N. ; Izumi, T. ; Tanabe, K. / Delamination behavior of Gd123 coated conductor fabricated by PLD. In: Physica C: Superconductivity and its applications. 2011 ; Vol. 471, No. 21-22. pp. 1075-1079.
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