Optimization of the texture formation and characterization of large size top-seeded-melt-grown YBCO pellets

Leblond, C. P.; Monot, I.; Provost, J.; Desgardin, G.

doi:10.1016/s0921-4534(98)00627-3

Cited by 43 publications

(39 citation statements)

References 21 publications

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“…The angular resolution of EBSD, of the order of 1 • -2 • [20], allows the quantification of misorientation between subgrains or twins and its correlation with the local microstructure. The widely used method of top seeding melt textured growth (TSMTG) [21][22][23] [24,25] seeds placed on top. The pellets were melt-textured following the thermal cycle described by Leblond et al [24].…”

Section: Classical Top Seeding Melt Textured Growth (Tsmtg) Processmentioning

confidence: 99%

“…The widely used method of top seeding melt textured growth (TSMTG) [21][22][23] [24,25] seeds placed on top. The pellets were melt-textured following the thermal cycle described by Leblond et al [24]. The growth starts at the interface between the pressed pellet and the seed and spreads all over the sample volume to become a quasi-single domain.…”

Section: Classical Top Seeding Melt Textured Growth (Tsmtg) Processmentioning

confidence: 99%

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EBSD study on YBCO textured bulk samples: correlation between crystal growth and ‘microtexture’

Grossin

Henrist

Mathieu

et al. 2006

Supercond. Sci. Technol.

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This work describes an electron backscattered diffraction (EBSD) study of the perovskite-derived structures YBa 2 Cu 3 O 7−δ . After having pointed out the difficulties of EBSD analyses in resolving the orientations of these pseudo-cubic structures, various YBaCuO bulk samples are analysed and the correlation between the microstructure, crystal growth and global texture, determined by neutron diffraction, is carried out. Homogeneous 'microtexture' with small subdomain misorientation of 12 • are measured for YBCO top seeding melt textured growth (TSMTG) samples. YBCO perforated samples also exhibit misoriented subdomains, giving rise to a heterogeneous 'microtexture' correlated to the YBCO growth front and to the pattern used for the perforating.

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Section: Classical Top Seeding Melt Textured Growth (Tsmtg) Processmentioning

confidence: 99%

Section: Classical Top Seeding Melt Textured Growth (Tsmtg) Processmentioning

confidence: 99%

EBSD study on YBCO textured bulk samples: correlation between crystal growth and ‘microtexture’

Grossin

Henrist

Mathieu

et al. 2006

Supercond. Sci. Technol.

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“…3a. At the same time, we can see a large number of Y211 grains, which are covered by the solidified BCO liquid due to its wettability to Y211 [12,13]. At the temperature of 1005 1C, YBCO crystals began to grow two-dimensionally from the undecomposed YBCO grains at the expense of Y211 grains and BCO melts.…”

Section: Resultsmentioning

confidence: 97%

A comparative study on liquid phase epitaxy initial stage of REBCO on MgO substrate

Yao

2005

Journal of Crystal Growth

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“…It can be seen that the Y211 particles (light gray color) are near uniformly distributed in the YBCO matrix of all the samples, but there was no obvious difference in the size and density of Y211 particles as the ZnO addition increased. It is known that Y211 particles can provide effective pinning centers, [25][26][27] but the flux pinning force provided by the Y211 particles is nearly the same for all samples based on the …”

Section: The Effects Of Zno Additions On Microstructure Of Ybco Bulksmentioning

confidence: 99%

Influence of ZnO doping on the properties of single domain YBCO bulks fabricated by RE+011 TSIG process

Yang

Yuan

Guo

2017

Int. J. Mod. Phys. B

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Single domain YBCO bulk superconductors with different additions of ZnO have been successfully fabricated by RE+011 TSIG process with a new solid phase of [(100 − x)(Y 2 O 3 +1.2BaCuO 2 )+xZnO] and a new liquid phase of (Y 2 O 3 +6CuO+10BaCuO 2 ). The effects of ZnO additions on the growth morphology, microstructure, critical temperature (Tc), the levitation force and trapped field of the YBCO bulks have been investigated. It is found that within the range of ZnO additions x = 0-1.0 wt.%, all the samples are of the typical characteristic of single-domain YBCO bulk; the Tc of the samples decreases from 92 K to 80 K when the ZnO addition x increases from x = 0 wt.% to x = 1.0 wt.%; the levitation force and trapped field of the samples firstly increase and then decrease with increase of ZnO additions after going through a maximum, which is closely related with the ZnO addition and the resulting flux pinning force caused by lattice distortion due to the substitution of Zn 2+ for Cu 2+ site in the YBCO crystal; the largest levitation force 36.8 N (77 K, 0.5 T) and trapped field 0.416 T (77 K, 0.5 T) of the samples are obtained when x = 0.1 wt.%, respectively. This result is significantly important and helpful for us to improve the properties of YBCO bulk superconductors.

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Optimization of the texture formation and characterization of large size top-seeded-melt-grown YBCO pellets

Cited by 43 publications

References 21 publications

EBSD study on YBCO textured bulk samples: correlation between crystal growth and ‘microtexture’

EBSD study on YBCO textured bulk samples: correlation between crystal growth and ‘microtexture’

A comparative study on liquid phase epitaxy initial stage of REBCO on MgO substrate

Influence of ZnO doping on the properties of single domain YBCO bulks fabricated by RE+011 TSIG process

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