Ball milling nanocrystallization of arc-melted and melt-spun Fe78Co5Nb3Zr3B5Ge5Cu1 alloy: Microstructure and magnetic properties

Javier Sebastián Blázquez (1) , Victorino Franco (2) , Alejandro Conde (2) , Stefan Roth (3)

1 Física de la Materia Condensada
2 Física de la Materia Condensada
3 IMW

The viability of developing a nanocrystalline microstructure for the Fe78Co5Nb3Zr3B5Ge5Cu1 composition using a planetary ball mill was studied. Two starting samples were chosen: an arc-melted ingot and a partially crystallized melt-spun ribbon. The α-Fe phase was detected in both initial samples, although different intermetallic phases were detected in each of them. Milling at 150 rpm, these intermetallics disappeared after 5 h for the melt-spun alloy (RQ) and did not disappear even after 70 h for the arc-melted sample (AM). However, the α-Fe phase became nanosized in both cases. A good thermal stability was found for the RQ alloy after 10 hours of milling, although the nanocrystal size increased from ~8 to ~20 nm after heating up to 973 K. The AM samples exhibited a lower coercivity and a higher magnetization than RQ samples.

Mots clés: Physical Sciences

Javier Sebastián Blázquez, Victorino Franco, Alejandro Conde, Stefan Roth. Ball milling nanocrystallization of arc-melted and melt-spun Fe78Co5Nb3Zr3B5Ge5Cu1 alloy: Microstructure and magnetic properties. Philosophical Magazine, 2006, 86 (15), pp.2275-2287. ⟨10.1080/14786430500300074⟩. ⟨hal-00513599⟩