CUED Publications database

Synthesis of dense bulk MgB<inf>2</inf> by an infiltration and growth process

Bhagurkar, AG and Yamamoto, A and Babu, NH and Durrell, JH and Dennis, AR and Cardwell, DA (2015) Synthesis of dense bulk MgB<inf>2</inf> by an infiltration and growth process. Superconductor Science and Technology, 28. ISSN 0953-2048

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Abstract

We report the processing of dense, superconducting MgB2 (2.4 g cm-3) by an infiltration and growth technique. The process, which involves infiltration of liquid magnesium at 750 C into a pre-defined boron precursor pellet, is relatively simple, results in the formation of a hard, dense structure and has the potential to fabricate large bulk samples of complex geometries. X-ray diffraction has been used to confirm the presence of the MgB2 primary phase with only residual magnesium content in the fully processed samples. The samples exhibit sharp superconducting transitions at 38.4 K and have critical current densities of up to 260 kA cm-2 in self-field at 5 K. Modest measured values of Hc2(0) of 17 T suggest that superconductivity in bulk MgB2 fabricated by this technique is in the clean pairing limit.

Item Type: Article
Subjects: UNSPECIFIED
Divisions: Div C > Materials Engineering
Depositing User: Cron Job
Date Deposited: 17 Jul 2017 19:11
Last Modified: 09 Sep 2021 00:39
DOI: 10.1088/0953-2048/28/1/015012