Reactive spark plasma sintering of MgB 2 in nitrogen atmosphere for the enhancement of the high-field critical current density
Year: 2016
Type: article
Abstract: High density bulks (97%–99%) of MgB 2 were prepared by spark plasma sintering (SPS) in nitrogen (N 2 ) atmosphere for different heating rates (10, 20 and 100 °C min −1 ) and compared with reference samples processed in vacuum and Ar. N 2 reacts with MgB 2 and forms MgB 9 N along the MgB 2 grain boundaries. The high-field critical current density is enhanced for the sample processed in N 2 with a heating rate of 100 °C min −1 . At 2–35 K, this sample shows the strongest contribution of the grain boundary pinning (GBP). All samples are in the point pinning (PP) limit and by increasing temperature the GBP contribution decreases.
Authors: P Badica, M Burdusel, S Popa, I Pasuk, I Ivan, H Borodianska, O Vasylkiv, A Kuncser, A M Ionescu, L Miu, G Aldica
Language: English
Subfield: Condensed Matter Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: bronze
Award: G2997218669
OpenAlex ID: W2519957809