The contribution of 211 particles to the mechanical reinforcement mechanism of 123 superconducting single domains

Mathieu, Jean-Philippe; Cano, I.G.; Koutzarova, T.; Rulmont, A.; Vanderbemden, Philippe; Dew‐Hughes, D.; Ausloos, Marcel; Cloots, Rudi

doi:10.1088/0953-2048/17/1/030

Cited by 20 publications

(24 citation statements)

References 33 publications

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“…The details of the synthesis process as well as microstructural characterizations of the materials have been described in previous papers [16], [17].…”

Section: Methodsmentioning

confidence: 99%

Measurements of Thermal Effects in a Bulk YBCO Single Domain Superconductor Submitted to a Variable Magnetic Field

Laurent

Vanderbemden

Meslin

et al. 2007

IEEE Trans. Appl. Supercond.

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Abstract-When YBCO single domains are subjected to a variable magnetic field, the motion of vortices may give rise to a significant temperature increase and a degradation of the superconducting properties. We have experimentally investigated such effects in bulk melt-processed YBCO single domains. Several temperature sensors, a pick-up coil and two Hall probes were placed against the surface of a monolithic bulk YBCO pellet. Data were simultaneously recorded during the application of ac magnetic fields of various amplitudes, either with or without a pre-existing dc trapped flux. The measurement results agree well with to those obtained by numerical modeling. It was also found that a superimposed dc magnetic moment reduces the temperature increase caused by the ac magnetic field.Index Terms-High-temperature superconductors, magnetic variables measurement, thermal variables measurement.

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“…The details of the synthesis process as well as microstructural characterizations of the materials have been described in previous papers [16], [17].…”

Section: Methodsmentioning

confidence: 99%

Measurements of Thermal Effects in a Bulk YBCO Single Domain Superconductor Submitted to a Variable Magnetic Field

Laurent

Vanderbemden

Meslin

et al. 2007

IEEE Trans. Appl. Supercond.

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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%

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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“…The standard Y-Ba-Cu-0 bulk single domains (I) were produced by the top-seeded melt-textured growth process (TSMTG) through a synthesis process detailed elsewhere [17]. The as-obtained single domain does not exhibit macrocracks or other visible defects.…”

Section: Sample Preparationmentioning

confidence: 99%

Study by Hall probe mapping of the trapped flux modification produced by local heating in YBCO HTS bulks for different surface/volume ratios

Laurent

Mathieu

Mattivi

et al. 2005

Supercond. Sci. Technol.

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The aim of this report is to compare the trapped field distribution under a local heating created at the sample edge for different sample morphologies. Hall probe mappings of the magnetic induction trapped in YBCO bulk samples maintained out of thermal equilibrium were performed on YBCO bulk single domains, YBCO single domains with regularly spaced hole arrays, and YBCO superconducting foams. The capability of heat draining was quantified by two criteria: the average induction B decay and the size of the thermally affected zone caused by a local heating of the sample. Among the three investigated sample shapes, the drilled single domain displays a trapped induction which is weakly affected by the local heating while displaying a high trapped field. Finally, a simple numerical modelling of the heat flux spreading into a drilled sample is used to suggest some design rules about the hole configuration and their size.

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The contribution of 211 particles to the mechanical reinforcement mechanism of 123 superconducting single domains

Cited by 20 publications

References 33 publications

Measurements of Thermal Effects in a Bulk YBCO Single Domain Superconductor Submitted to a Variable Magnetic Field

Measurements of Thermal Effects in a Bulk YBCO Single Domain Superconductor Submitted to a Variable Magnetic Field

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

Study by Hall probe mapping of the trapped flux modification produced by local heating in YBCO HTS bulks for different surface/volume ratios

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