Growth and characterization of oxide buffer layers for YBCO coated conductors

Epitaxial films of rare-earth (RE = La, Ce, Eu, and Gd) tantalates, RE3TaO7 with pyrochlore structures were grown on biaxially textured nickel-3 at.% tungsten (Ni-W) substrates using chemical solution deposition (CSD) process. Precursor solution of 0.3∼0.4 M concentration of total cations were spin coated on to short samples of Ni-W substrates and the films were crystallized at 1050∼1100 °C in a gas mixture of Ar- 4% H2 for 15 to 60 min. X-ray studies show that the films of pyrochlore RE tantalate films are highly textured with cube-on-cube epitaxy. Improved texture was observed in case of lanthanum tantalate (La3TaO7) film grown on Ni-W substrates. Scanning electron microscopy (SEM) and atomic force microscopy (AFM) investigations of RE3TaO7 films reveal a fairly dense and smooth microstructure without cracks and porosity. The rare-earth tantalate layers may be potentially used as buffer layers for YBa2Cu3O7-δ (YBCO) coated conductors.

Download Full-text

Electrical and Thermal Characterization of Commercial Superconducting YBCO Coated Conductors

IEEE Transactions on Applied Superconductivity ◽

10.1109/tasc.2013.2243793 ◽

2013 ◽

Vol 23 (3) ◽

pp. 6602304-6602304 ◽

Cited By ~ 4

Author(s):

G. Angeli ◽

D. Colangelo ◽

M. Bocchi ◽

B. Dutoit ◽

L. Martini

Keyword(s):

Thermal Characterization ◽

Coated Conductors ◽

Ybco Coated Conductors

Download Full-text

Modified Lanthanum Zirconium Oxide buffer layers for low-cost, high performance YBCO coated conductors

Physica C Superconductivity ◽

10.1016/j.physc.2010.02.003 ◽

2010 ◽

Vol 470 (5-6) ◽

pp. 352-356 ◽

Cited By ~ 23

Author(s):

M. Parans Paranthaman ◽

S. Sathyamurthy ◽

Xiaoping Li ◽

E.D. Specht ◽

S.H. Wee ◽

...

Keyword(s):

Zirconium Oxide ◽

High Performance ◽

Low Cost ◽

Coated Conductors ◽

Buffer Layers ◽

Lanthanum Zirconium Oxide ◽

Ybco Coated Conductors

Download Full-text

Fast Growth Processes of Buffer Layers for YBCO Coated Conductors on Biaxially-Textured Ni Tapes

IEEE Transactions on Applied Superconductivity ◽

10.1109/tasc.2009.2018797 ◽

2009 ◽

Vol 19 (3) ◽

pp. 3295-3298 ◽

Cited By ~ 23

Author(s):

Yijie Li ◽

Zuncheng Zhao ◽

Linfei Liu ◽

Qinghao Ye ◽

Hang Zheng

Keyword(s):

Fast Growth ◽

Coated Conductors ◽

Buffer Layers ◽

Growth Processes ◽

Ybco Coated Conductors

Download Full-text

Sol–gel deposition of high-performance Re0.2Ce0.8O2/La2Zr2O7 composite buffer layers on Ni–W tapes for YBCO coated conductors

Journal of Sol-Gel Science and Technology ◽

10.1007/s10971-015-3833-y ◽

2015 ◽

Vol 77 (1) ◽

pp. 94-99 ◽

Cited By ~ 3

Author(s):

Weibai Bian ◽

Yuanqing Chen ◽

Xinni Tang ◽

Weihua Zhang ◽

Gaoyang Zhao ◽

...

Keyword(s):

High Performance ◽

Sol Gel ◽

Coated Conductors ◽

Buffer Layers ◽

Ybco Coated Conductors

Download Full-text

In Situ EBSD Study of Stable Cube Texture in an Advanced Composite Substrate Used in YBCO-Coated Conductors

Microscopy and Microanalysis ◽

10.1017/s1431927620001415 ◽

2020 ◽

Vol 26 (3) ◽

pp. 365-372

Author(s):

Yaotang Ji ◽

Hongli Suo ◽

ZiLi Zhang ◽

Lin Ma ◽

Jiazhi Li ◽

...

Keyword(s):

Yield Strength ◽

Cube Texture ◽

Strain Curve ◽

Coated Conductors ◽

Buffer Layers ◽

High Yield ◽

Alloy Composite ◽

Composite Substrates ◽

Ybco Coated Conductors

AbstractAdvanced Ni8W/Ni12W/Ni8W alloy composite substrates used in YBCO-coated conductors with a strong cube texture and high yield strength have been fabricated, and a CeO2 buffer layer film was successfully deposited on the composite substrates. Through in situ tensile testing coupled with electron backscattered diffraction (EBSD) analysis, the stability of the cube texture of Ni8W/Ni12W/Ni8W alloy composite substrates has been investigated. The stress–strain curve shows that the yield strength (at 0.2% strain) of the composite substrates exceeds 250 Mpa. The orientation of grains and boundaries on the surface of the substrates was almost unchanged, while the strain exceeds 0.2%, which indicated that the composite substrates are adequate for depositing buffer layers and YBCO layers by the reel-to-reel process.

Download Full-text