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High critical current density YBa2Cu3O7δ thick films using ion beam assisted deposition MgO bi-axially oriented template layers on nickel-based superalloy substrates

Published online by Cambridge University Press:  31 January 2011

J. R. Groves ,
P. N. Arendt ,
S. R. Foltyn ,
Q. X. Jia ,
T. G. Holesinger ,
H. Kung ,
E. J. Peterson ,
R. F. DePaula ,
P. C. Dowden  and
L. Stan
...Show all authors
J. R. Groves
Affiliation:
Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, New Mexico, 87545
P. N. Arendt
Affiliation:
Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, New Mexico, 87545
S. R. Foltyn
Affiliation:
Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, New Mexico, 87545
Q. X. Jia
Affiliation:
Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, New Mexico, 87545
T. G. Holesinger
Affiliation:
Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, New Mexico, 87545
H. Kung
Affiliation:
Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, New Mexico, 87545
E. J. Peterson
Affiliation:
Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, New Mexico, 87545
R. F. DePaula
Affiliation:
Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, New Mexico, 87545
P. C. Dowden
Affiliation:
Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, New Mexico, 87545
L. Stan
Affiliation:
Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, New Mexico, 87545
L. A. Emmert
Affiliation:
Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, New Mexico, 87545
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Abstract

Nickel-based superalloys have been coated with magnesium oxide (MgO) using ion-beam-assisted deposition (IBAD). This technique produced a well-oriented bi-axially textured MgO template layer with a Ф scan full width half maximum of 6.4°. The layer architecture for these samples was as follows: polished hastelloy C276/amorphous Si3N4/IBAD MgO/ pulsed laser deposited (PLD) Y2O3–ZrO2/PLD CeO2/PLD YBa2Cu3O7?δ. The subsequent heteroepitaxial PLD of 1.5-mm-thick YBCO showed a nominal critical current density of over 1 MA/cm2 (75 K, self-field) along a microbridge and had an in-plane mosaic spread of 4.8° and an out-of-plane spread of 1.3°. These results compare well with our earlier work using IBAD yttria-stabilized zirconia (YSZ) as a template layer and indicate that IBAD MgO is a suitable substitute. Furthermore, these results suggest that IBAD MgO could be adapted to and increase the feasibility of a continuous process to fabricate longer lengths of coated conductors at speeds 100 times faster than that previously realized with IBAD YSZ.

Type
Rapid Communications
Information
Journal of Materials Research , Volume 16 , Issue 8 , August 2001 , pp. 2175 - 2178
Copyright
Copyright © Materials Research Society 2001

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References

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