Spark plasma synthesis and sintering of superconducting MgB 2-based Materials

Tatiana Prikhna, Jacques Noudem, Wolfgang Gawalek, Athanasios Mamalis, Alexander Soldatov, Yaroslav Savchuk, Viktor Moshchil, Michael Eisterer, Harald W. Weber, Sergey Dub, Tobias Habisreuther, Jan Dellith, Shujie You, Christa Schmidt, Friedrich Karau, Ulrich Dittrich, István Vajda, Nina Sergienko, Vladimir Sokolovsky, Doris LitzkendorfXavier Chaud, Vladimir Sverdun, Roman Kuznietsov

Research output: Chapter in Book/Report/Conference proceedingConference contribution

8 Citations (Scopus)

Abstract

Superconducting (SC) and mechanical properties of spark plasma (or SPS) produced MgB 2 -based materials allow their efficient applications in fault current limiters, superconducting electromotors, pumps, generators, magnetic bearings, etc. The synthesized from Mg and B at 50 MPa, 1050 °C for 30 min material has a density of 2.52 g/cm 3, critical current density, j c = 7.1·10 5 A/cm 2 at 10 K , 5.4·10 5 A/cm 2 at 20 K, and 9·10 4 A/cm 2 at 35 K in zero magnetic field; at 20 K its field of irreversibility B irr(20)=7 T and upper critical field B c2(20)=11 T; microhardness H V=10.5 GPa and fracture toughness K 1C =1.7 MPa·m 1/2 at 4.9 N-load. SPS-manufactured in- situ MgB 2- based materials usually have somewhat higher j c than sintered ex-situ. The pressure variations from 16 to 96 MPa during the SPS-process did not affect material SC characteristics significantly; the j c at 10-20 K was slightly higher and the material density was higher by 11%, when pressures of 50-96 MPa were used. The structure of SPS-produced MgB 2 material contains Mg-B-O inclusions and inclusions of higher borides (of compositions near MgB 4, MgB 7, MgB 12, MgB 17, MgB 20), which can be pinning centers. The presence of higher borides in the MgB 2 structure can be revealed by the SEM and Raman spectroscopy.

Original languageEnglish
Title of host publicationApplied Electromagnetic Engineering for Magnetic, Superconducting and Nano Materials
Pages3-8
Number of pages6
DOIs
Publication statusPublished - Jul 30 2012
Event7th Japanese-Mediterranean and Central European Workshop on Applied Electromagnetic Engineering for Magnetic, Superconducting and Nano Materials, JAPMED'7 - Budapest, Hungary
Duration: Jul 6 2011Jul 9 2011

Publication series

NameMaterials Science Forum
Volume721
ISSN (Print)0255-5476

Other

Other7th Japanese-Mediterranean and Central European Workshop on Applied Electromagnetic Engineering for Magnetic, Superconducting and Nano Materials, JAPMED'7
CountryHungary
CityBudapest
Period7/6/117/9/11

Keywords

  • Critical current density
  • Mechanical properties
  • MgB -based superconductive nanostructural materials
  • Raman spectroscopy
  • Spark plasma synthesis and sintering

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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  • Cite this

    Prikhna, T., Noudem, J., Gawalek, W., Mamalis, A., Soldatov, A., Savchuk, Y., Moshchil, V., Eisterer, M., Weber, H. W., Dub, S., Habisreuther, T., Dellith, J., You, S., Schmidt, C., Karau, F., Dittrich, U., Vajda, I., Sergienko, N., Sokolovsky, V., ... Kuznietsov, R. (2012). Spark plasma synthesis and sintering of superconducting MgB 2-based Materials. In Applied Electromagnetic Engineering for Magnetic, Superconducting and Nano Materials (pp. 3-8). (Materials Science Forum; Vol. 721). https://doi.org/10.4028/www.scientific.net/MSF.721.3