Published May 2007 | Version v1
Journal article Metadata-only

The effects of sintering temperature on superconductivity in MgB2/Fe wires

Creators

  • 1. Institute for Superconducting and Electronic Materials, University of Wollongong, Northfields Avenue, Wollongong, NSW 2522 (Australia)
  • 2. Magnet Development Group, Superconducting Materials Center, National Institute for Materials Science, 3-13 Sakura, Tsukuba, Ibaraki 305-0003 (Japan)

Description

We studied the effects of sintering temperature on the phase transformation, lattice parameters, full width at half-maximum (FWHM), strain, critical temperature (Tc), critical current density (Jc) and resistivity (ρ) in MgB2/Fe wires. All samples were fabricated by the in situ powder-in-tube method (PIT) and sintered within a temperature range of 650-900 deg. C. It was observed that wires sintered at low temperature, 650 deg. C, resulted in higher Jc up to 12 T and lower Tc. The best transport Jc value reached 4200 A cm-2 at 4.2 K and 10 T. This is related to the grain boundary pinning due to small grain size. On the other hand, wires sintered at 900 deg. C had a lower Jc in combination with a higher Tc

Additional details

Identifiers

DOI
10.1088/0953-2048/20/5/007;
PII
S0953-2048(07)41554-8;

Publishing Information

Journal Title
Superconductor Science and Technology
Journal Volume
20
Journal Issue
5
Journal Page Range
p. 448-451
ISSN
0953-2048
CODEN
SUSTEF

INIS

Country of Publication
United Kingdom
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
38083600
Subject category
S36: MATERIALS SCIENCE;
Descriptors DEI
CRITICAL CURRENT; CRITICAL TEMPERATURE; CURRENT DENSITY; GRAIN BOUNDARIES; GRAIN SIZE; IRON; LATTICE PARAMETERS; MAGNESIUM BORIDES; PHASE TRANSFORMATIONS; SINTERING; STRAINS; SUPERCONDUCTIVITY; TEMPERATURE RANGE 0400-1000 K
Descriptors DEC
ALKALINE EARTH METAL COMPOUNDS; BORIDES; BORON COMPOUNDS; CURRENTS; ELECTRIC CONDUCTIVITY; ELECTRIC CURRENTS; ELECTRICAL PROPERTIES; ELEMENTS; FABRICATION; MAGNESIUM COMPOUNDS; METALS; MICROSTRUCTURE; PHYSICAL PROPERTIES; SIZE; TEMPERATURE RANGE; THERMODYNAMIC PROPERTIES; TRANSITION ELEMENTS; TRANSITION TEMPERATURE