Microstructure and superconductivity of shock processed high TC superconductors

Z. Iqbal; N. Thadhani; K. A. Johnson; K. V. Rao; B. L. Ramakrishna; Renu Sharma; F. Reidinger; H. Eckhardt

doi:10.1016/0921-4534(89)90505-4

Microstructure and superconductivity of shock processed high T_C superconductors

Z. Iqbal, N. Thadhani, K. A. Johnson, K. V. Rao, B. L. Ramakrishna, Renu Sharma, F. Reidinger, H. Eckhardt

Engineering of Matter, Transport and Energy, School for (IAFSE-SEMTE)

Research output: Contribution to journal › Article › peer-review

4 Scopus citations

Abstract

Explosive shock compaction of furnace synthesized 1 micron size powders of YBa₂Cu₃O₇ and Bi₂Sr₂CaCu₂O₈ have been carried out both in the planar and cylindrical geometries. In both cases interesting microstructures and near theoretical packing densities are obtained. However bulk superconductivity is degraded but restored with some interesting changes on reannealing. The tetragonal and orthorhombic Tl₂Ba₂CuO₆ phases were successfully shock-synthesized in the time domain of microseconds at 100kbar. The products obtained ranged in phase purity from 85 to nearly 100%. The shock-synthesized tetragonal phase is a bulk superconductor with T_c (zero) of 55K. High resolution electron microscopy shows double copper layer defects in the shock synthesized tetragonal Tl₂Ba₂CuO₆. The importance of shock induced defects and microstructures in the magnetic flux pinning mechanisms are briefly discussed.

Original language	English (US)
Pages (from-to)	885-886
Number of pages	2
Journal	Physica C: Superconductivity and its applications
Volume	162-164
Issue number	PART 2
DOIs	https://doi.org/10.1016/0921-4534(89)90505-4
State	Published - Dec 1989

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

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10.1016/0921-4534(89)90505-4

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title = "Microstructure and superconductivity of shock processed high TC superconductors",

abstract = "Explosive shock compaction of furnace synthesized 1 micron size powders of YBa2Cu3O7 and Bi2Sr2CaCu2O8 have been carried out both in the planar and cylindrical geometries. In both cases interesting microstructures and near theoretical packing densities are obtained. However bulk superconductivity is degraded but restored with some interesting changes on reannealing. The tetragonal and orthorhombic Tl2Ba2CuO6 phases were successfully shock-synthesized in the time domain of microseconds at 100kbar. The products obtained ranged in phase purity from 85 to nearly 100%. The shock-synthesized tetragonal phase is a bulk superconductor with Tc (zero) of 55K. High resolution electron microscopy shows double copper layer defects in the shock synthesized tetragonal Tl2Ba2CuO6. The importance of shock induced defects and microstructures in the magnetic flux pinning mechanisms are briefly discussed.",

author = "Z. Iqbal and N. Thadhani and Johnson, {K. A.} and Rao, {K. V.} and Ramakrishna, {B. L.} and Renu Sharma and F. Reidinger and H. Eckhardt",

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doi = "10.1016/0921-4534(89)90505-4",

language = "English (US)",

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T1 - Microstructure and superconductivity of shock processed high TC superconductors

AU - Iqbal, Z.

AU - Thadhani, N.

AU - Johnson, K. A.

AU - Rao, K. V.

AU - Ramakrishna, B. L.

AU - Sharma, Renu

AU - Reidinger, F.

AU - Eckhardt, H.

PY - 1989/12

Y1 - 1989/12

N2 - Explosive shock compaction of furnace synthesized 1 micron size powders of YBa2Cu3O7 and Bi2Sr2CaCu2O8 have been carried out both in the planar and cylindrical geometries. In both cases interesting microstructures and near theoretical packing densities are obtained. However bulk superconductivity is degraded but restored with some interesting changes on reannealing. The tetragonal and orthorhombic Tl2Ba2CuO6 phases were successfully shock-synthesized in the time domain of microseconds at 100kbar. The products obtained ranged in phase purity from 85 to nearly 100%. The shock-synthesized tetragonal phase is a bulk superconductor with Tc (zero) of 55K. High resolution electron microscopy shows double copper layer defects in the shock synthesized tetragonal Tl2Ba2CuO6. The importance of shock induced defects and microstructures in the magnetic flux pinning mechanisms are briefly discussed.

AB - Explosive shock compaction of furnace synthesized 1 micron size powders of YBa2Cu3O7 and Bi2Sr2CaCu2O8 have been carried out both in the planar and cylindrical geometries. In both cases interesting microstructures and near theoretical packing densities are obtained. However bulk superconductivity is degraded but restored with some interesting changes on reannealing. The tetragonal and orthorhombic Tl2Ba2CuO6 phases were successfully shock-synthesized in the time domain of microseconds at 100kbar. The products obtained ranged in phase purity from 85 to nearly 100%. The shock-synthesized tetragonal phase is a bulk superconductor with Tc (zero) of 55K. High resolution electron microscopy shows double copper layer defects in the shock synthesized tetragonal Tl2Ba2CuO6. The importance of shock induced defects and microstructures in the magnetic flux pinning mechanisms are briefly discussed.

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IS - PART 2

ER -

Microstructure and superconductivity of shock processed high T_C superconductors

Abstract

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