Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1498653 | Scripta Materialia | 2014 | 4 Pages |
Abstract
Nanocrystalline superconducting MgB2 bulks were prepared by high pressure sintering of ball milled MgB2 powders. A significant improvement in the in-field critical current density Jc has been obtained in the bulk sintered at 700 °C. The value of Jc reaches as high as 105 A cm−2 at 5 K, 8 T and 104 A cm−2 at 15 K, 6 T. Intragranular defects and a large number of grain boundaries acting as pinning centers are both responsible for the higher Jc.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Yaxin Sun, Xiumei Song, Dongli Yu, Songlin Ran, Ailin Xia,