About: Preparation and properties of Mg-Fe and Mg-Ni-Fe nanocomposites.

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	We prepared Mg-Fe and Mg-Fe-Ni nanocomposites using spark synthesis of pure Mg, and Fe or permalloy (Ni3Fe) electrodes. The magnetic separation and sedimentation treatments were used for separation of nanocrystaline parts from the as-prepared powders. In the Mg-Fe sample, a-Fe, Fe in Mg, and FeO phases were determined using the Mössbauer phase analysis, and Mg, MgO, and a-Fe by the x-ray diffraction measurements. The Fe in Mg phase with approx. 8at.% Fe is a new metastable phase not described in equilibrium phase diagram handbooks until now. Its temperature dependence of magnetization showed spin-glass like behaviour of the sample. An annealing in vacuum (10-3 Pa) or in the protective atmosphere (H2) caused transformation of the Fe in Mg phase into a-Fe. With increasing a-Fe content an increase of the FeO was observed. The Mg-Fe-Ni nanocomposite exhibits similar behaviour and phase composition but the Ni3Fe phase was replaced the a-Fe and different features of the Fe(Ni) in Mg phase were observed. B We prepared Mg-Fe and Mg-Fe-Ni nanocomposites using spark synthesis of pure Mg, and Fe or permalloy (Ni3Fe) electrodes. The magnetic separation and sedimentation treatments were used for separation of nanocrystaline parts from the as-prepared powders. In the Mg-Fe sample, a-Fe, Fe in Mg, and FeO phases were determined using the Mössbauer phase analysis, and Mg, MgO, and a-Fe by the x-ray diffraction measurements. The Fe in Mg phase with approx. 8at.% Fe is a new metastable phase not described in equilibrium phase diagram handbooks until now. Its temperature dependence of magnetization showed spin-glass like behaviour of the sample. An annealing in vacuum (10-3 Pa) or in the protective atmosphere (H2) caused transformation of the Fe in Mg phase into a-Fe. With increasing a-Fe content an increase of the FeO was observed. The Mg-Fe-Ni nanocomposite exhibits similar behaviour and phase composition but the Ni3Fe phase was replaced the a-Fe and different features of the Fe(Ni) in Mg phase were observed. B (en)
Title	Preparation and properties of Mg-Fe and Mg-Ni-Fe nanocomposites. Preparation and properties of Mg-Fe and Mg-Ni-Fe nanocomposites. (en)
skos:prefLabel	Preparation and properties of Mg-Fe and Mg-Ni-Fe nanocomposites. Preparation and properties of Mg-Fe and Mg-Ni-Fe nanocomposites. (en)
skos:notation	RIV/68081723:_____/01:07013270!RIV/2003/AV0/A07003/N
http://linked.open.../vavai/riv/strany	55
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(GA106/99/0183), P(GA202/01/0668), P(ME 209), Z(AV0Z1010914), Z(AV0Z2041904)
http://linked.open...vai/riv/dodaniDat	2003
http://linked.open...aciTvurceVysledku	Schneeweiss, Oldřich Jirásková, Yvonna
http://linked.open.../riv/druhVysledku	D - Článek ve sborníku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Ústav fyziky materiálů AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	692528
http://linked.open...ai/riv/idVysledku	RIV/68081723:_____/01:07013270
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	nanocrystals; magnetism; Mössbauer spectroscopy (en)
http://linked.open.../riv/klicoveSlovo	Mössbauer spectroscopy nanocrystals magnetism
http://linked.open...ontrolniKodProRIV	[E4A04E294F75]
http://linked.open...v/mistoKonaniAkce	Košice [SK]
http://linked.open...i/riv/mistoVydani	Košice
http://linked.open...i/riv/nazevZdroje	11th Czech and Slovak Conference on Magnetism CSMAG'01 - Programme & Abstracts.
http://linked.open...in/vavai/riv/obor	BM
http://linked.open...ichTvurcuVysledku	2 (xsd:int)
http://linked.open...cetTvurcuVysledku	5 (xsd:int)
http://linked.open...ocetUcastnikuAkce	0 (xsd:int)
http://linked.open...nichUcastnikuAkce	0 (xsd:int)
http://linked.open...vavai/riv/projekt	Metallic materials with pronounced magnetotransport, magnetocaloric and magnetoelastic effects Relation between structure, electric and magnetic parameters of nanocrystalline and gradient materials and their diffusibility and solubility for gases http://linked.opendata.cz/resource/domain/vavai/projekt/ME%20209
http://linked.open...UplatneniVysledku	2001
http://linked.open...iv/tvurceVysledku	Schneeweiss, Oldřich Šebek, Josef Jirásková, Yvonna Lin, S. Yao, X.
http://linked.open...vavai/riv/typAkce	WRD - Světová
http://linked.open.../riv/zahajeniAkce	2001-08-20 (xsd:date)
http://linked.open...n/vavai/riv/zamer	Experimentální a teoretický výzkum kondenzovaných systémů s význačnými fyzikálními vlastnostmi Behavior and properties of metallic and non-metallic materials in relation to their structure, research on processes leading to degradation of material quality
number of pages	1 (xsd:int)
http://purl.org/ne...btex#hasPublisher	Šafarik University Košice

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