Cube Texture Formation of Cu-33at.%Ni Alloy Substrates and CeO2 Buffer Layer for YBCO Coated Conductors

2014 ◽  
Vol 887-888 ◽  
pp. 345-348 ◽  
Author(s):  
Hui Tian ◽  
Hong Li Suo ◽  
Ya Ru Liang ◽  
Yue Zhao ◽  
Lin Ma ◽  
...  
Keyword(s):  
Buffer Layer ◽  
Full Width Half Maximum ◽  
Cube Texture ◽  
Coated Conductors ◽  
Texture Formation ◽  
Solution Deposition ◽  
X Ray ◽  
Ni Alloy ◽  
Electron Back Scattered Diffraction ◽  
Ybco Coated Conductors

Cube texture formation of Cu-33 at.%Ni alloy substartes and CeO2buffer layer prepared by chemical solution deposition on the textured substrate were investigated by electron back scattered diffraction (EBSD) and XRD technics systematically. The results shown that a strong cube textured Cu-33at.%Ni alloy substrate with the cube texture fraction of 99.8 % (< 10°) was obtained after annealing at 1000°C for 1 h. The full width half maximum (FWHM) values for the X-ray (111) phi-scan and (002) omega-scan in this substrate were 7.31° and 5.51°, respectively. Furthermore, the cube texture fraction of epitaxially grown CeO2buffer layer was 95 % (< 10°), and the FWHM values of phi-scan and omega-scan being 6.98° and 5.92°, respectively.

Cube Texture Formation in Ni-8at.%W Alloy Substrates Effected by the Initial Grain Size of Ingot

2015 ◽  
Vol 1105 ◽  
pp. 195-199
Author(s):  
Yi Chen Meng ◽  
Hong Li Suo ◽  
Hui Tian ◽  
Lin Ma ◽  
Yi Wang ◽  
...  
Keyword(s):  
Grain Size ◽  
Critical Current Density ◽  
Cold Rolling ◽  
Current Density ◽  
Cube Texture ◽  
Coated Conductors ◽  
Texture Formation ◽  
High Critical Current Density ◽  
High Quality ◽  
Ybco Coated Conductors

The high critical current density of YBCO-coated conductors prepared by rolling assisted biaxially textured substrate technic is mostly based on the high quality cube-textured substrates. In this paper, the effect of initial grain size of ingot on the microstructure and texture evolutions during cold rolling has been investigated in high alloyed Ni8W ingots, which can affect the cube texture formation in Ni8W alloy substrates subsequently. Finally, high quality cube texture had been obtained in Ni8W alloy substrate with fine initial grain size prepared by advanced SPS technology.

A new single buffer layer for YBCO coated conductors prepared by chemical solution deposition

2007 ◽  
Vol 452 (1-2) ◽  
pp. 43-47 ◽  
Author(s):  
Guo Li ◽  
Minghua Pu ◽  
Xiaohua Du ◽  
Yanbing Zhang ◽  
Huaming Zhou ◽  
...  
Keyword(s):  
Buffer Layer ◽  
Chemical Solution Deposition ◽  
Coated Conductors ◽  
Chemical Solution ◽  
Solution Deposition ◽  
Ybco Coated Conductors

Single Buffer Layer Technology for YBCO Coated Conductors

2001 ◽  
Vol 689 ◽  
Author(s):  
M. Parans Paranthaman ◽  
T. Aytug ◽  
H. Y. Zhai ◽  
S. Sathyamurthy ◽  
H. M. Christen ◽  
...  
Keyword(s):  
Buffer Layer ◽  
High Current Density ◽  
Rf Magnetron Sputtering ◽  
Coated Conductors ◽  
High Current ◽  
Ybco Films ◽  
X Ray ◽  
Diffusion Barrier Layer ◽  
Good Template ◽  
Ybco Coated Conductors

ABSTRACTIn an effort to develop alternative single buffer layer technology for YBa2Cu3O7-δ (YBCO) coated conductors, we have investigated LaMnO3 (LMO) as a potential buffer layer. High-quality LMO films were grown directly on biaxially textured Ni and Ni-W (3%) substrates using rf magnetron sputtering. YBCO films were then grown on LMO buffers using pulsed laser deposition. Detailed X-ray studies have shown that both YBCO and LMO layers were grown with a single epitaxial orientation. Rutherford backscattering spectroscopy (RBS) analyses have indicated the ratio of La to Mn ratio is 1:1. SEM micrographs indicated that 3000-Å-thick LMO films on biaxially textured Ni (100) substrates were dense, continuous and crack-free. A high Jc of over 1 MA/cm2 at 77 K and self-field was obtained on YBCO films grown on LMO-buffered Ni or Ni-W substrates. We have identified LaMnO3 as a good diffusion barrier layer for Ni and it also provides a good template for growing high current density YBCO films.

Texture Evolution in Ni Substrate Prepared by Powder Metallurgy and Casting Methods

2007 ◽  
Vol 534-536 ◽  
pp. 1605-1608
Author(s):  
Jun Hyung Lim ◽  
Kyu Tae Kim ◽  
Eui Cheol Park ◽  
Jin Ho Joo ◽  
Hyoung Sub Kim ◽  
...  
Keyword(s):  
Powder Metallurgy ◽  
Annealing Temperature ◽  
Texture Evolution ◽  
Cube Texture ◽  
Coated Conductors ◽  
Reduction Ratio ◽  
The Other ◽  
X Ray ◽  
Ni Substrate ◽  
Ybco Coated Conductors

Cube textured Ni substrate were fabricated for YBCO coated conductors from the initial specimens prepared by powder metallurgy (P/M) and casting and the effects of annealing temperature and reduction ratio on texture formation and microstructural evolutio were evaluated. The initial specimens were rolled by 98.6% and 99.2% reduction ratio and then annealed in the temperature range of 600°C to 1200°C. The microstructure and texture were evaluated by optical microscopy and X-ray pole-figure analysis. We observed that microstructure of the initial specimen varied with preparation methods.Texture analysis indicated that a strong cube texture formed for substrate made by P/M, and the degree of texture did not significantly vary with annealing temperature of 600°C~1100°C. On the other hand, the texture of substrate made by casting was more dependent on the annealing temperature and twin texture ({221}<221>) and several minor texture components started to form at 1000°C. In addition, the texture of substrate made by P/M was significantly dependent on the reduction ratio.

Evolution of Cube Texture in Cu-45at.%Ni Alloy Substrates for YBCO Coated Conductors

2015 ◽  
Vol 778 ◽  
pp. 105-109
Author(s):  
Hui Tian ◽  
Yi Wang ◽  
Pan Wang ◽  
Ya Ru Liang ◽  
Lin Ma ◽  
...  
Keyword(s):  
Grain Growth ◽  
Texture Evolution ◽  
Cube Texture ◽  
Rolling Texture ◽  
Coated Conductors ◽  
Recrystallization Process ◽  
Ni Alloy ◽  
Back Scattering ◽  
Cold Rolled ◽  
Ybco Coated Conductors

The cube texture evolution during annealing of the heavy cold-rolled Cu-45at.%Ni alloy tapes were investigated by XRD and electron back scattering diffraction techniques. The results indicated that the fraction of Copper-type rolling texture was slightly strengthened during recovery, and then strongly reduced during recrystallization. The cube texture was formed by consuming the rolling texture components during recrystallization process, and the S, Copper and Brass orientations were consumed together via cube grain growth. A strong cube-textured Cu-45at.%Ni alloy substrate with the cube texture fraction of 98.6 % (< 10°) was obtained after annealing at 1000 oC for 1 h.

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