Superconducting and Microstructural Properties of (Mg+2B)+MgB_2/Cu Wires Obtained by High Gas Pressure Technology

• Authors: A. Kario , A. Morawski , B. Głowacki , T. Łada , M. Smaga , R. Diduszko , D. Kolesnikov , A. Zaleski , A. Kondrat , D. Gajda
• Languages of publication: EN

Abstracts

EN

In order to improve the overall critical current characteristics of Cu sheathed in situ MgB_2 wires a special architecture of the wire, and processing parameters were used. The study presents the influence of the ex situ MgB_2 chemical barrier between ex situ core and Cu, suppressing the reaction of Cu with Mg. Wires, doped with 10 at.% SiC of 18 nm average grain size, were fabricated from MgH_2 and B or from Mg and B powders, using the powder-in-tube method. The methods of rotary swaging or drawing were used as the alternating wire-forming processes. The samples were annealed under high Ar gas pressure (hot isostatic pressing) at 750ºC and 1.0 GPa for 15 and 30 min. A significant difference in Cu distribution across the wires for a long and short time of sintering was observed. The formation of microstructure in the powder-in-tube process and the relationship between the microstructure and critical current density J_c values, are discussed in this paper.

Keywords

EN

84.71.Mn

Discipline

• 84.71.Mn: Superconducting wires, fibers, and tapes

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2007
• Volume: 111
• Issue: 5
• Pages: 693-703

Dates

published

2007-05

Contributors

author

A. Kario

• Institute of High Pressure Physics, Polish Academy of Sciences, Sokołowska 29/37, 01-142 Warszawa, Poland
• Faculty of Physics, Warsaw University of Technology, Warszawa, Poland

author

A. Morawski

• Institute of High Pressure Physics, Polish Academy of Sciences, Sokołowska 29/37, 01-142 Warszawa, Poland

author

B. Głowacki

• Department of Materials Science and Metallurgy, University of Cambridge, Pembroke Street, Cambridge CB2 3QZ, England

author

T. Łada

• Institute of High Pressure Physics, Polish Academy of Sciences, Sokołowska 29/37, 01-142 Warszawa, Poland

author

M. Smaga

• Institute of High Pressure Physics, Polish Academy of Sciences, Sokołowska 29/37, 01-142 Warszawa, Poland
• Faculty of Mechatronics, Military University of Technology, Warszawa, Poland

author

R. Diduszko

• Industrial Institute of Electronics (PIE), Warszawa, Poland

author

D. Kolesnikov

• Institute of High Pressure Physics, Polish Academy of Sciences, Sokołowska 29/37, 01-142 Warszawa, Poland

author

A. Zaleski

• Institute of Low Temperature and Structure Research, PAS, Wrocław, Poland

author

A. Kondrat

• Institute of Low Temperature and Structure Research, PAS, Wrocław, Poland

author

D. Gajda

• Int. Lab. of High Magnetic Fields and Low Temperatures, Wrocław, Poland

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Identifiers

DOI

10.12693/APhysPolA.111.693