Interplay between boron precursors and Ni-Co-B nanoparticle doping in the fabrication of MgB2 superconductor with improved electromagnetic properties

The influence of different boron precursor powders on the critical current density of MgB2 superconductor with added Ni-Co-B nanoparticles is investigated. Different types of boron have different morphologies, particle sizes and impurity content, all of which have a strong impact on the critical cur...

Full description

Saved in:
Bibliographic Details
Published in:Acta materialia 2014-11, Vol.80, p.457-467
Main Authors: MUSTAPIC, Mislav, HORVAT, Josip, SKOKO, Zeljko, MD SHAHRIAR AL HOSSAIN, SHI XUE DOU
Format: Article
Language:English
Subjects:
Applied sciences
Borides
Boron
Doping
Exact sciences and technology
Intermetallic compounds
Magnesium compounds
Metals. Metallurgy
Nanostructure
Nickel
Purity
Superconductors
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The influence of different boron precursor powders on the critical current density of MgB2 superconductor with added Ni-Co-B nanoparticles is investigated. Different types of boron have different morphologies, particle sizes and impurity content, all of which have a strong impact on the critical current density (J c). The boron samples investigated in this study include three different boron powders: semicrystalline boron (denoted as SC), with nanosized particles and high purity (99%) supplied from Specialty Materials, Inc. (USA); amorphous boron (denoted as AB), with nanosized particles and high purity (99%) supplied from Russia; and finally pure crystalline boron (denoted as CB), with micron-sized particles and 96% purity supplied from Tangshan WeiHao (China). The MgB2 samples made from AB showed the best improvement of critical current with 2.5wt.% Ni-Co-B doping; J c was above 100,000Acm-2 at 4T and 5K. Under the same conditions, J c for MgB2 made from SC was slightly worse than for the MgB2 made from AB, 100,000Acm-2. On the other hand, MgB2 made from CB presented sharply reduced J c with Ni-Co-B doping at both measured temperatures, 5K and 20K.
ISSN:1359-6454
1873-2453
DOI:10.1016/j.actamat.2014.08.030