DocumentCode :
13247
Title :
The Influence of Milling Time and 
Addition on the Superconducting Properties of 
Author :
da Silva, Lucas B. S. ; Hellstrom, Eric E. ; Rodrigues, Durval
Author_Institution :
Escola de Eng. de Lorena, Univ. de Sao Paulo, Lorena, Brazil
Volume :
25
Issue :
3
fYear :
2015
fDate :
Jun-15
Firstpage :
1
Lastpage :
4
Abstract :
High-energy ball milling is generally used in granular materials to increase grain connectivity and densification. In this study, different high-energy ball milling times were investigated to optimize the MgB2 superconducting properties in samples with added ZrB2. The objectives of this addition were to modify the Mg planes and to create crystalline defects in the superconducting matrix that can act as pinning centers. We observed the behavior of the dopant on the superconducting properties, and found the optimal ball milling time of 300 min improved .ic in high magnetic field and Hirr from 7.2 to 10.0 T at 4.2 K.
Keywords :
alloying additions; ball milling; boron alloys; defect states; densification; granular materials; magnesium alloys; superconducting transition temperature; zirconium alloys; Mg planes; MgB2 superconducting properties; MgB2; MgB2-ZrB2; ZrB2 addition; crystalline defects; densification; dopant behavior; grain connectivity; granular materials; high-energy ball milling; magnetic flux density 7.2 T to 10 T; milling time influence; optimal ball milling time; pinning centers; superconducting matrix; temperature 4.2 K; time 300 min; Ball milling; Critical current density (superconductivity); Granular superconductors; Heat treatment; Magnetic fields; Milling; Superconducting magnets; $hbox{MgB}_{2}$ superconductor; $hbox{ZrB}_{2}$ addition; Characterization; MgB2 superconductor; ZrB2 addition; characterization; milling time;
fLanguage :
English
Journal_Title :
Applied Superconductivity, IEEE Transactions on
Publisher :
ieee
ISSN :
1051-8223
Type :
jour
DOI :
10.1109/TASC.2014.2364779
Filename :
6936912
Link To Document :
