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Effects of high pressure on the physical properties of MgB2
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- Prikhna, T. (author)
- Institute for Superhard Materials, National Academy of Sciences of Ukraine, Kiev, 04074, Ukraine
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- Gawalek, W. (author)
- Institut für Photonische Technologien, Jena, 07745, Germany
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- Savchuk, Y. (author)
- Institute for Superhard Materials, National Academy of Sciences of Ukraine, Kiev, 04074, Ukraine
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- (creator_code:org_t)
- 2010-10-07
- 2011
- English.
- In: Journal of Superconductivity and Novel Magnetism. - : Springer Science and Business Media LLC. - 1557-1939 .- 1557-1947. ; 24:5, s. 137-150
- Journal article (peer-reviewed)
Abstract
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- 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.
Subject headings
- NATURVETENSKAP -- Fysik -- Annan fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Other Physics Topics (hsv//eng)
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- Fysik
- Physics
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- Prikhna, T.
- Gawalek, W.
- Savchuk, Y.
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- Sokolovsky, V.
- Eisterer, M.
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- Weber, H.W.
- Noudem, J.
- Serga, M.
- Turkevich, V.
- Tompsic, M.
- Tkach, V.
- Danilenko, N.
- Goldacker, W.
- Karau, F.
- Fesenko, I.
- Rindfleisch, M.
- Dellith, J.
- Wendt, M.
- You, Shujie
- Meerovich, V.
- Dub, S.
- Moshchil, V.
- Sergienko, N.
- Kozyrev, A.
- Habisreuther, T.
- Schmidt, C.
- Litzkendorf, D.
- Nagorny, P.
- Sverdun, V.
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- Luleå University of Technology
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