Optimization of fabrication conditions of MgB2/Fe superconducting tapes using response surface methodology
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Dosyalar
Tarih
2012
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Springer
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
We have optimized fabrication conditions of MgB2/Fe superconducting monofilament tapes fabricated using ex-situ powder-in-tube method without any intermediate annealing. Influences of three effective parameters (annealing temperature, annealing time and argon (Ar) gas atmosphere pressure during the heat treatments) on the transport critical current densities (J(c)) were investigated. The samples were characterized using X-ray diffraction, scanning electron microscope, energy dispersive X-ray spectrometer, optical microscope, critical transition temperature and J(c) measurements. Response surface methodology was used to optimize the conditions for the maximum J(c) of the samples and to understand the significance and interaction of the factors affecting J(c). 3-level-3-factor central composite design was employed to evaluate the effects of the fabrication conditions parameters such as annealing temperatures (850-950 A degrees C), annealing times (30-120 min.) and Ar pressures (1-5 bars) on J(c) of the samples. Based on the analysis of ridge max, the optimum fabrication conditions were as follows: annealing temperature 948 A degrees C, annealing time 58 min. and Ar pressure 3 bars.
Açıklama
Anahtar Kelimeler
MgB2/Fe
Kaynak
Journal Of Materials Science-Materials In Electronics
WoS Q Değeri
Q2
Scopus Q Değeri
Q2
Cilt
23
Sayı
7
