TY - JOUR
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.
Copyright:
Copyright 2011 Elsevier B.V., All rights reserved.
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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U2 - 10.1016/j.physc.2011.05.127
DO - 10.1016/j.physc.2011.05.127
M3 - Article
AN - SCOPUS:80055013997
VL - 471
SP - 1075
EP - 1079
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
SN - 0921-4534
IS - 21-22
ER -