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Crystallization of CoFeSiB metallic glass induced by long-time ball milling |
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| Institution: | a Department of Physics of Condensed Matters, Faculty of Science, P.J. Šafárik University, Park Angelinum 9, 041 54 Košice, Slovakia b Institute of Experimental Physics, Slovak Academy of Sciences, Watsonova 47, 043 53 Košice, Slovakia c IFW Dresden, Institut für Metalische Werkstoffe, Helmholtzstraße 20, 010 69 Dresden, Germany d Department of Solid State Physics, University of ?odz, Pomorska 149/153, 90 236 ?odz, Poland |
| Abstract: | Milling up to 800 h causes amorphous Co70.3Fe4.7Si10B15 alloy, prepared in the form of thin ribbon, to partially crystallize thus forming a powder material consisting of an amorphous phase and fcc-Co nanocrystals with an average grain size of about 10 nm. A gradual increase of the nanocrystalline fcc-Co fraction, produced by ball milling, was detected. Prolonged milling results in destabilization of the fcc-Co phase and oxidation of the powder material (presence of CoO phase after 1500 h of milling). The thermal stability studies of as-quenched and milled Co70.3Fe4.7Si10B15 alloy emphasized a two step crystallization behavior. During the first crystallization event, cobalt rich phases, i.e., fcc-Co and hcp-Co crystallize, whereas after the second crystallization event, Co2B and Co2Si are formed. |
| Keywords: | M190 C290 |
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