Delamination behavior of Gd123 coated conductor fabricated by PLD

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

doi:10.1016/j.physc.2011.05.127

Delamination behavior of Gd123 coated conductor fabricated by PLD

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

Research output: Contribution to journal › Article › peer-review

25 Citations (Scopus)

Abstract

We have studied delamination behavior of GdBa₂Cu ₃O_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/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.

Original language	English
Pages (from-to)	1075-1079
Number of pages	5
Journal	Physica C: Superconductivity and its applications
Volume	471
Issue number	21-22
DOIs	https://doi.org/10.1016/j.physc.2011.05.127
Publication status	Published - 2011 Nov
Externally published	Yes

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

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10.1016/j.physc.2011.05.127

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title = "Delamination behavior of Gd123 coated conductor fabricated by PLD",

abstract = "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.",

keywords = "Delamination strength, Gd123 coated conductor, XPS",

author = "N. Sakai and S. Lee and N. Chikumoto and T. Izumi and K. Tanabe",

note = "Funding Information: This work was supported by the New Energy and Industrial Technology Development Organization (NEDO) as a project for development of Materials & Power Application of Coated Conductors, M-PACC. ",

year = "2011",

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doi = "10.1016/j.physc.2011.05.127",

language = "English",

volume = "471",

pages = "1075--1079",

journal = "Physica C: Superconductivity and its Applications",

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T1 - Delamination behavior of Gd123 coated conductor fabricated by PLD

AU - Sakai, N.

AU - Lee, S.

AU - Chikumoto, N.

AU - Izumi, T.

AU - Tanabe, K.

N1 - Funding Information: This work was supported by the New Energy and Industrial Technology Development Organization (NEDO) as a project for development of Materials & Power Application of Coated Conductors, M-PACC.

PY - 2011/11

Y1 - 2011/11

N2 - 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.

AB - 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.

KW - Delamination strength

KW - Gd123 coated conductor

KW - XPS

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Delamination behavior of Gd123 coated conductor fabricated by PLD

Abstract

Keywords

ASJC Scopus subject areas

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