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Structure of MgB2 Ceramics Synthesized with Excess of Magnesium after Cold Deformation and Annealing

Structure of MgB2 Ceramics Synthesized with Excess of Magnesium after Cold Deformation and Annealing

Authors :
M. V. Degtyarev
Yu. V. Blinova
T. P. Krinitsina
E. I. Kuznetsova
Source :
Physics of Metals and Metallography. 120:867-873
Publication Year :
2019
Publisher :
Pleiades Publishing Ltd, 2019.

Abstract

—In a bulk MgB2 compound synthesized with an excess of magnesium, a structure that could provide high critical currents has been obtained as a result of deformation by upsetting and subsequent annealing at 650°C for 7 h. The investigation of this structure using X-ray diffraction and scanning and transmission electron microscopy methods has shown that a dense nanosized matrix MgB2 phase with good intergrain bonding is formed in the obtained material. In the matrix phase, there are uniformly distributed dispersed inclusions of MgO, which could serve as pinning centers.

Details

ISSN :
15556190 and 0031918X
Volume :
120
Database :
OpenAIRE
Journal :
Physics of Metals and Metallography
Accession number :
edsair.doi...........ae573abac2cb2bff570c0c8ea07e53a8
Full Text :
https://doi.org/10.1134/s0031918x19090060