Influence of thermal treatment on microstructure of Fe75Ni2Si8B13C2 amorphous alloy

0385504 - ÚFM 2013 RIV GB eng J - Článek v odborném periodiku
Minić, Dušan M. - Blagojević, V. - David, Bohumil - Pizúrová, Naděžda - Žák, Tomáš - Minić, Dragica M.
Influence of thermal treatment on microstructure of Fe75Ni2Si8B13C2 amorphous alloy.
Intermetallics. Roč. 25, č. 1 (2012), s. 75-79. ISSN 0966-9795. E-ISSN 1879-0216
Grant CEP: GA MŠMT 1M0512
Institucionální podpora: RVO:68081723
Klíčová slova: Glasses, metallic * Microstructure * Diffraction * Microscopy
Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
Impakt faktor: 1.857, rok: 2012

DSC and thermomagnetic measurements of Fe75Ni2Si8B13C2 amorphous alloy investigated in 298e973 K temperature range show that alloy remains amorphous up to around 773 K. As thermomagnetic measurements provided more complete information, the alloy ribbon was successively annealed at temperatures chosen on the basis of these measurements and its microstructure was investigated after each annealing cycle using X-ray diffraction and SEM. Two stable, a-Fe(Si) and Fe2B, and one metastable, Fe3B, crystalline phases were identified after annealing. Microstructural analysis showed that Fe3B probably acts as an intermediate in the formation of Fe2B, which formed later than the other two phases. Si and B in the alloy show a tendency to separate into different phases. Analysis of microstructure, combined with chemical composition, showed that after the final annealing at 973 K, alloy ribbon is composed of interdispersed nanocrystals of alpha-Fe(Si) and Fe2B less than 90 nm in size, with no observable larger domains of either phase.
Trvalý link: http://hdl.handle.net/11104/0215219