Spark plasma synthesis and sintering of superconducting MgB2-based Materials

Prikhna, T; Noudem, J; Gawalek, W; Mamalis, A; Soldatov, A; Savchuk, Y; Moshchil, V; Eisterer, M; Weber, HW; Dub, S; Habisreuther, T; Dellith, J; You, S; Schmidt, C; Karau, F; Dittrich, U; Vajda, I; Sergienko, N; Sokolovsky, V; Litzkendorf, D; Chaud, X; Sverdun, V; Kuznietsov, R

dc.contributor.author	Prikhna, T	en
dc.contributor.author	Noudem, J	en
dc.contributor.author	Gawalek, W	en
dc.contributor.author	Mamalis, A	en
dc.contributor.author	Soldatov, A	en
dc.contributor.author	Savchuk, Y	en
dc.contributor.author	Moshchil, V	en
dc.contributor.author	Eisterer, M	en
dc.contributor.author	Weber, HW	en
dc.contributor.author	Dub, S	en
dc.contributor.author	Habisreuther, T	en
dc.contributor.author	Dellith, J	en
dc.contributor.author	You, S	en
dc.contributor.author	Schmidt, C	en
dc.contributor.author	Karau, F	en
dc.contributor.author	Dittrich, U	en
dc.contributor.author	Vajda, I	en
dc.contributor.author	Sergienko, N	en
dc.contributor.author	Sokolovsky, V	en
dc.contributor.author	Litzkendorf, D	en
dc.contributor.author	Chaud, X	en
dc.contributor.author	Sverdun, V	en
dc.contributor.author	Kuznietsov, R	en
dc.date.accessioned	2014-03-01T02:54:01Z
dc.date.available	2014-03-01T02:54:01Z
dc.date.issued	2012	en
dc.identifier.issn	02555476	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/36539
dc.subject	Critical current density	en
dc.subject	Mechanical properties	en
dc.subject	MgB2-based superconductive nanostructural materials	en
dc.subject	Raman spectroscopy	en
dc.subject	Spark plasma synthesis and sintering	en
dc.subject.other	Ex situ	en
dc.subject.other	Material density	en
dc.subject.other	Nanostructural materials	en
dc.subject.other	Pinning center	en
dc.subject.other	Pressure variations	en
dc.subject.other	Situ MgB	en
dc.subject.other	Spark plasma	en
dc.subject.other	Spark plasma synthesis	en
dc.subject.other	Upper critical fields	en
dc.subject.other	Zero magnetic fields	en
dc.subject.other	Borides	en
dc.subject.other	Critical current density (superconductivity)	en
dc.subject.other	Density (specific gravity)	en
dc.subject.other	Electric fault currents	en
dc.subject.other	Electric sparks	en
dc.subject.other	Electromagnetism	en
dc.subject.other	Magnetic bearings	en
dc.subject.other	Magnetic materials	en
dc.subject.other	Mechanical properties	en
dc.subject.other	Plasmas	en
dc.subject.other	Raman scattering	en
dc.subject.other	Raman spectroscopy	en
dc.subject.other	Sintering	en
dc.subject.other	Superconductivity	en
dc.subject.other	Superconducting materials	en
dc.title	Spark plasma synthesis and sintering of superconducting MgB2-based Materials	en
heal.type	conferenceItem	en
heal.identifier.primary	10.4028/www.scientific.net/MSF.721.3	en
heal.identifier.secondary	http://dx.doi.org/10.4028/www.scientific.net/MSF.721.3	en
heal.publicationDate	2012	en
heal.abstract	Superconducting (SC) and mechanical properties of spark plasma (or SPS) produced MgB2 -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/cm3, critical current density, jc = 7.1·105 A/cm2 at 10 K , 5.4·105 A/cm2 at 20 K, and 9·104 A/cm2 at 35 K in zero magnetic field; at 20 K its field of irreversibility Birr(20)=7 T and upper critical field Bc2(20)=11 T; microhardness HV=10.5 GPa and fracture toughness K1C =1.7 MPa·m1/2 at 4.9 N-load. SPS-manufactured in- situ MgB2- based materials usually have somewhat higher jc than sintered ex-situ. The pressure variations from 16 to 96 MPa during the SPS-process did not affect material SC characteristics significantly; the jc 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 MgB2 material contains Mg-B-O inclusions and inclusions of higher borides (of compositions near MgB4, MgB7, MgB12, MgB17, MgB20), which can be pinning centers. The presence of higher borides in the MgB2 structure can be revealed by the SEM and Raman spectroscopy. © (2012) Trans Tech Publications.	en
heal.journalName	Materials Science Forum	en
dc.identifier.doi	10.4028/www.scientific.net/MSF.721.3	en
dc.identifier.volume	721	en
dc.identifier.spage	3	en
dc.identifier.epage	8	en