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- Title
Effects of High Pressure on the Physical Properties of MgB.
- Authors
Prikhna, T.; Gawalek, W.; Savchuk, Y.; Soldatov, A.; Sokolovsky, V.; Eisterer, M.; 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, S.
- Abstract
The synthesis of MgB-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 1.8-1.0×10 A/cm in the self-field and 10 A/cm in a magnetic field of 8 T at 20 K, 5-3×10 A/cm in self-field at 30 K, the corresponding critical fields being H=15 T at 22 K and irreversible fields H=13 T at 20 K, and H=3.5 T at 30 K, thermal conduction of 53±2 W/(m⋅K), the Vickers hardness H=10.12±0.2 GPa under a load of 148.8 N and the fracture toughness K=7.6±2.0 MPa⋅m 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.
- Subjects
HIGH pressure (Science); THERMAL properties of superconductors; MAGNESIUM diboride; THERMAL conductivity; STOICHIOMETRY
- Publication
Journal of Superconductivity & Novel Magnetism, 2011, Vol 24, Issue 1/2, p137
- ISSN
1557-1939
- Publication type
Article
- DOI
10.1007/s10948-010-0909-3