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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� 2015 IOP Publishing Ltd. We report the processing of dense, superconducting MgB 2 (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 MgB 2 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 H c 2(0) of 17 T suggest that superconductivity in bulk MgB 2 fabricated by this technique is in the clean pairing limit.

Item Type: Article
Divisions: Div C > Materials Engineering
Depositing User: Cron Job
Date Deposited: 17 Jul 2017 19:11
Last Modified: 21 Jun 2018 02:40