Structural and compositional defects in high-J/sub c/ Bi-2223 tapes

Holesinger, T. G.; Bingert, J. F.; Willis, J. O.; Li, Qi; Parrella, R.; Teplitsky, M.; Rupich, M.W.; Riley, G. N.

doi:10.1109/77.784969

Cited by 27 publications

(24 citation statements)

References 17 publications

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“…Critical current densities ( 's) have reached 69. 6 (self-field, 77 K) in experimental Ag-sheathed Bi-2223 tapes [2]. However, significantly higher values approaching 300 have been observed for parts of these tapes by current reconstructions of magneto-optical images [3].…”

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confidence: 99%

“…Quantitative compositional analysis was performed by energy dispersive spectrometry (EDS) in the TEM using as standards a glass of composition and a pellet prepared by solid state synthesis. Further details of the TEM specimen preparation and quantification method can be found in previous work [6], [8]. Cross section area measurements and standard transport measurements in self and applied magnetic fields were used to determine the values at 77 K with an electric-field criterion of 1 .…”

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confidence: 99%

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A Shell Model for the Filament Structure of Bi-2223 Conductors

Holesinger

Kennison

Liao

et al. 2005

IEEE Trans. Appl. Supercond.

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Abstract-Phase development during the first few minutes of heat treatment of first generation (Bi Pb) 2 Sr 2 Ca 2 Cu 3 O y (Bi-2223) multifilamentary wires determines to a large extent the overall microstructure, the efficiency of primary phase development, competing secondary phase development, texture evolution, and grain-to-grain connectivity. It is shown that the filament structure of these wires can be described in terms of a shell model. The shell next to the silver sheath is comprised of well-formed Bi-2223 colonies grapho-epitaxially aligned to the silver sheath and only a few grains (average one colony) thick. Inside this shell is a less well-aligned, less phase pure, more porous Bi-2223 structure through which current is carried in a nonuniform manner as shown by MOI.

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confidence: 99%

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confidence: 99%

A Shell Model for the Filament Structure of Bi-2223 Conductors

Holesinger

Kennison

Liao

et al. 2005

IEEE Trans. Appl. Supercond.

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“…A significant amount of work related to the effects of lead on the transport properties, field performance, microstmcture, and compositional variations in fully processed tapes has been published previously [3,12,13]. In the current work the structural changes and formation of the lead-rich liquid phase at the beginning of the processing cycleare examined.…”

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confidence: 99%

Investigation of the initial stages of processing Bi-2223 multifilamentary tapes by analytical electron microscopy

Holesinger

Ayala²,

Baurceanu³

et al. 2001

IEEE Trans. Appl. Supercond.

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“…Standards consisted of amorphous Bi-22 12 and Ca#b04. Details of the compositional quantification method can be found elsewhere [4].…”

Section: Expenmentalmentioning

confidence: 99%

The Early Stages of the Microstructural Development of the Colony Structure in Bi-2223 Tapes

Holesinger

2001

MRS Proc.

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The current protocol for processing (Bi,Pb)2Sr2Ca2Cu3010-~ (Bi-2223) multifilamentary tapes involves the in situ formation of the primary phase from a suitable mixture of precursor phases. As such, the developments during the first few minutes of heat treatment determine to a large extent the efficiency of primary phase development, competing secondary phase development, texture evolution, and grain-to-grain connectivity. This work documents the development of the liquid phase, secondary phases, defects which may affect alignment and reaction kinetics, and the precipitation of Bi-2223 from the liquid phase.

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Structural and compositional defects in high-J/sub c/ Bi-2223 tapes

Cited by 27 publications

References 17 publications

A Shell Model for the Filament Structure of Bi-2223 Conductors

A Shell Model for the Filament Structure of Bi-2223 Conductors

Investigation of the initial stages of processing Bi-2223 multifilamentary tapes by analytical electron microscopy

The Early Stages of the Microstructural Development of the Colony Structure in Bi-2223 Tapes

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