Microstructure and transport properties of compaction-modified in situ Fe/MgB2 wires
Yükleniyor...
Tarih
2016
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Springer
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
This study has shown the effect of excessive mechanical deformation by pressing and consecutive heat treatment, respectively, on the microstructure and transport properties of mono-core sintered in situ Fe/MgB2 wires. These wires were pressed into short tapes under 1 GPa uni-axial pressure. Transport properties like critical temperature, transition width and engineering critical current density of the same samples were determined before and after pressing and after annealing. Phase formation and grain size of the samples were studied with XRD. The SEM analysis indicated that the mechanical deformation reduced initial voids to a large extent but caused cracks, increased the number of grain boundaries and introduced weak links. The subsequent heat treatment on the pressed samples improved the microstructure and the grain connectivity. Possibility of a final densification of the reacted in situ wires was discussed in terms of transport properties.
Açıklama
Anahtar Kelimeler
MgB2 Wire, Amorphous Nano Boron, Mechanical Deformation, Porosity
Kaynak
Journal Of Superconductivity And Novel Magnetism
WoS Q Değeri
Q3
Scopus Q Değeri
Q3
Cilt
29
Sayı
10
