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Effects of high pressure on the physical properties of MgB2
Institute for Superhard Materials, National Academy of Sciences of Ukraine.
Institut für Photonische Technologien, Jena.
Institute for Superhard Materials, National Academy of Sciences of Ukraine.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.ORCID iD: 0000-0002-5145-1560
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Number of Authors: 302011 (English)In: Journal of Superconductivity and Novel Magnetism, ISSN 1557-1939, E-ISSN 1557-1947, Vol. 24, no 5, p. 137-150Article in journal (Refereed) Published
Abstract [en]

The synthesis of MgB2-based materials under high pressure gave the possibility to suppress the evaporation of magnesium and to obtain near theoretically dense nanograined structures with high superconducting, thermal conducting, and mechanical characteristics: critical current densities of 1.8-1.0×106 A/cm2 in the self-field and 103 A/cm2 in a magnetic field of 8 T at 20 K, 5-3×105 A/cm2 in self-field at 30 K, the corresponding critical fields being Hc2=15 T at 22 K and irreversible fields Hirr=13 T at 20 K, and Hirr=3.5 T at 30 K, thermal conduction of 53±2 W/(m{dot operator}K), the Vickers hardness HV=10.12±0.2 GPa under a load of 148.8 N and the fracture toughness K1 C=7.6±2.0 MPa{dot operator}m0.5 under the same load, the Young modulus E=213 GPa. Estimation of quenching current and AC losses allowed the conclusion that high-pressure-prepared materials are promising for application in transformer-type fault current limiters working at 20-30 K.

Place, publisher, year, edition, pages
2011. Vol. 24, no 5, p. 137-150
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Other Physics Topics
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Fysik
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URN: urn:nbn:se:ltu:diva-2417DOI: 10.1007/s10948-010-0909-3ISI: 000289855700020Scopus ID: 2-s2.0-80052153798Local ID: 0098fe20-d77b-11df-8b36-000ea68e967bOAI: oai:DiVA.org:ltu-2417DiVA, id: diva2:975269
Note

Validerad; 2011; 20101014 (andbra)

Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Soldatov, AlexanderYou, Shujie

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