Observation of exsolution textures within Ba–Cu–O-rich solidified melts of Y–Ba–Cu–O materials and their relationship to Y123 nucleation and texturing

Alarco, José A.; Riches, James D.; Barry, John C.

doi:10.1016/s0921-4534(00)00023-x

Cited by 7 publications

(2 citation statements)

References 15 publications

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“…For obtaining intense and richly contrasted EBSD Kikuchi patterns on bulk high-T c superconductors, polishing of the surface is unavoidable. Previous experiments using EBSD on melt-textured YBCO [9,14] have more or less failed due to the high sensitivity of the EBSD technique. The EBSD Kikuchi patterns are generated from electrons backscattered from a depth of typically 50-200 nm, so any imperfections close to the sample surface will cause deterioration of the patterns.…”

Section: Methodsmentioning

confidence: 99%

Application of electron backscatter diffraction to bulk high-Tc superconductors

Koblischka-Veneva

Koblischka

Simon

et al. 2002

Supercond. Sci. Technol.

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We have successfully obtained electron backscatter diffraction (EBSD) Kikuchi patterns on various bulk high-Tc superconductors (polycrystalline KClO3-doped and undoped YBa2Cu3O7−δ (YBCO), single crystalline YBCO and NdBa2Cu3O7−y) and on YBCO and NdBCO thin films. We have established a sample polishing procedure to obtain intense Kikuchi patterns without an additional carbon coating of the ceramic superconductors. We present Kikuchi patterns, pole figures and orientation maps of the samples. On the polycrystalline KClO3-doped YBCO samples we find two major orientations (001) and (100) normal to the sample surface, while the undoped sample does not exhibit any orientation maxima, which is ascribed to the effect of a liquid phase due to the KClO3-additive during the preparation process. Furthermore, we discuss the future possibilities for the application of the EBSD technique for growing larger, bulk melt-textured samples for applications.

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Section: Methodsmentioning

confidence: 99%

Application of electron backscatter diffraction to bulk high-Tc superconductors

Koblischka-Veneva

Koblischka

Simon

et al. 2002

Supercond. Sci. Technol.

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“…Although it is used to explain the Ca distribution in 123 grains, the dissolution of Ca in the liquid-phase BaCuO 2 (or the mixture of BaCuO 2 and BaCu 2 O 2 [8,9]) calls for a direct verification. Nevertheless, based on the above experimental results, one should conclude that, in the case of growing Ca-doped 123 grains through the melt, Ca prefers to stay in the 123 grains rather than in the GBs that are created when growth fronts join with each other.…”

Section: Introductionmentioning

confidence: 99%

Composition analysis of Ca-doped YBa₂Cu₃O_7−δ/Y₂BaCuO₅prepared by the top-seeding melt-texture growth

He¹,

Su²,

Luo³

et al. 2002

Supercond. Sci. Technol.

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The Ca-doped YBa2Cu3O7−δ/Y2BaCuO5 bulk-textured superconductors were prepared by using the top-seeding melt-textured growth process. Composition analyses were made for such prepared samples. We found that Ca concentration in the YBa2Cu3O7−δ grains decreased along the growing direction; Ca preferred to substitute Y in the YBa2Cu3O7−δ grains, rather than to stay at the grain boundary. The accumulation of extra CuO at the growth front was considered as one of the causes of the inhomogeneous distribution of Ca.

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On the existence of a homologous series of BamCum+nOy oxides with the cubic structure of the BaCuO2 oxide

Клинкова

Николайчик

Барковский

et al. 2010

Physica C: Superconductivity

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Observation of exsolution textures within Ba–Cu–O-rich solidified melts of Y–Ba–Cu–O materials and their relationship to Y123 nucleation and texturing

Cited by 7 publications

References 15 publications

Application of electron backscatter diffraction to bulk high-Tc superconductors

Application of electron backscatter diffraction to bulk high-Tc superconductors

Composition analysis of Ca-doped YBa₂Cu₃O_7−δ/Y₂BaCuO₅prepared by the top-seeding melt-texture growth

On the existence of a homologous series of BamCum+nOy oxides with the cubic structure of the BaCuO2 oxide

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Observation of exsolution textures within Ba–Cu–O-rich solidified melts of Y–Ba–Cu–O materials and their relationship to Y123 nucleation and texturing

Cited by 7 publications

References 15 publications

Application of electron backscatter diffraction to bulk high-Tc superconductors

Application of electron backscatter diffraction to bulk high-Tc superconductors

Composition analysis of Ca-doped YBa2Cu3O7−δ/Y2BaCuO5prepared by the top-seeding melt-texture growth

On the existence of a homologous series of BamCum+nOy oxides with the cubic structure of the BaCuO2 oxide

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Composition analysis of Ca-doped YBa₂Cu₃O_7−δ/Y₂BaCuO₅prepared by the top-seeding melt-texture growth