Structural transformations of Fe81B13Si4C2 amorphous alloy induced by heating

0353647 - ÚFM 2011 RIV NL eng J - Journal Article
Minić, Dragica M. - Minić, Dušan M. - Žák, Tomáš - Roupcová, Pavla - David, Bohumil
Structural transformations of Fe81B13Si4C2 amorphous alloy induced by heating.
Journal of Magnetism and Magnetic Materials. Roč. 323, č. 5 (2011), s. 400-404. ISSN 0304-8853. E-ISSN 1873-4766
R&D Projects: GA MŠMT 1M0512
Institutional research plan: CEZ:AV0Z20410507
Keywords : Amorphous material * Metallic glass * Metal and alloy * Phase transition * Thermal analysis * Mössbauer spectrum * X-ray diffraction
Subject RIV: BM - Solid Matter Physics ; Magnetism
Impact factor: 1.780, year: 2011

Thermal stability and crystallization of theFe81B12Si4C2 alloy were investigated in the temperature range 25–700 oC by the XRD and Mössbauer analysis. It was shown that on heating the as-prepared amorphous Fe81B12Si4C2 alloy undergoes thermal stabilization through a series of structural transformations involving the process of stress-relieving (temperature range 200–400 oC), followed by a loss of ferromagnetic properties(Curie temperature at 420 oC) and finally crystallization (temperature range 450–530 oC). The process of crystallization begins by formation of two crystal phases: Fe3B and subsequently Fe2B, as well as a solid solution a-Fe(Si). Within crease in annealing temperature, the completely crystallized alloy involved only two phases,Fe2B and solidsolution a-Fe(Si). XRD patterns established a difference in phase composition and size of the formed crystallites during crystallization depending on the side(fishy or shiny)of the ribbon.
Permanent Link: http://hdl.handle.net/11104/0192827