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Effects of high pressure on the physical properties of MgB2
- Publication Year :
- 2010
-
Abstract
- 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 \cdot 106 A/cm2 in the self field and 103 A/cm2 in a magnetic field of 8 T at 20 K, 5-3 \cdot 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 \cdot \kappa), the Vickers hardness Hv=10.12+/-0.2 GPa under a load of 148.8 N and the fracture toughness K1C = 7.6+/-2.0 MPa m0.5 under the same load, the Young modulus E=213 GPa. Estimation of quenching current and AC losses allowed the conclusion that highpressure-prepared materials are promising for application in transformer-type fault current limiters working at 20-30 K.<br />Comment: International Conference on Superconductivity and Magnetism 25-30 April 2010,Antalya, Turkey, in print Journal of Superconductivity and Novel Magnetism
- Subjects :
- Superconductivity
Materials science
Magnesium
Condensed Matter - Superconductivity
Evaporation
chemistry.chemical_element
FOS: Physical sciences
Young's modulus
Condensed Matter Physics
Microstructure
Electronic, Optical and Magnetic Materials
Superconductivity (cond-mat.supr-con)
symbols.namesake
Fracture toughness
Thermal conductivity
chemistry
Vickers hardness test
symbols
Composite material
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....1cb43fa4f462962fa26c8cfe73ec1510