Phase transitions in Co78Si9B13 and Fe78Si9B13 metallic glasses induced by isochronal annealing

• Autorzy: Jakubczyk E.
• Konferencja: 8th International Conference on Intermolecular and Magnetic Interaction in Matter, Nałeczów 8-10 September 2005
• Języki publikacji: EN

Abstrakty

EN

The crystallization process of Co78Si9B13 and Fe72Si9B13 metallic glasses was stimulated by isochronal annealing at various temperatures (573-823 K). By the DSC, X-ray diffraction, Hall and electrical resistivity measurements it was found that the crystallization proceeds through two main stages. At the first stage, alfa-Co and alfa-Fe phases are formed and at the second stage Co2B and Fe2B phases are crystallized. During the crystallization, the ferromagnetic ordering of both alloys is still conserved. Fe78Si 9B13 alloy has a much wider range of structural stability. The activation energy determined from DSC measurements and the total energy of the created phases obtained by quantum chemistry method confirmed the sequence and the type of the created phases. The creation of crystalline phases from the amorphous matrix was related to a distinct decrease of the electrical and Hall resistivities and the spontaneous Hall coefficient.

Słowa kluczowe

EN

metallic glass; crystallization; phase transition; activation energy; Hall effect

PL

szkło metaliczne; krystalizacja; przejścia fazowe; energia aktywacji; efekt Halla

• Wydawca: De Gruyter
• Czasopismo: Materials Science Poland
• Rocznik: 2006
• Tom: Vol. 24, No. 4
• Strony: 1027--1036
• Opis fizyczny: Bibliogr. 17 poz.

Twórcy

autor

Jakubczyk E.

• Institute of Physics, Jan Długosz University, al. Armii Krajowej 13/15, 42-201 Częstochowa,

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