Incorporation of superconducting MgB2 into plasma electrolytic oxidation coatings on aluminium

Aliasghari, S. and Skeldon, P. and Zhou, X. and Stenning, G.B.G. and Valizadeh, R. and Junginger, T. and Burt, G. (2019) Incorporation of superconducting MgB2 into plasma electrolytic oxidation coatings on aluminium. Surface and Coatings Technology, 380. ISSN 0257-8972

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Abstract

MgB 2 particles have been incorporated into a coating formed by AC plasma electrolytic oxidation (PEO) on aluminium under a constant current density. The incorporation of MgB 2 into the coating was characterized by X-ray diffraction, scanning electron microscopy and energy dispersive X-ray spectroscopy. The additions of particles to the electrolyte promoted a voltage decrease, possibly a result of the initiation of a “soft” sparking regime. The transition occurred at earlier times with increase of the MgB 2 concentration and enhanced MgB 2 incorporation into the coating. The coating containing particles was thicker than one in which MgB 2 was absent and had a nodular surface, with MgB 2 accumulations in the valleys between the nodules. A superconducting quantum interference device revealed superconductivity below about 39 K, the critical temperature of MgB 2, and hysteresis in magnetic moment-field curves that typifies a type II superconductor.

Item Type:
Journal Article
Journal or Publication Title:
Surface and Coatings Technology
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3100/3104
Subjects:
ID Code:
138753
Deposited By:
Deposited On:
14 Jul 2020 13:20
Refereed?:
Yes
Published?:
Published
Last Modified:
22 Sep 2020 04:48