Formation of ferromagnetic bulk amorphous Fe40Ni40P14B6 alloys

TL;DR

This paper reports the successful preparation of ferromagnetic bulk amorphous Fe40Ni40P14B6 alloys with varying diameters using rapid quenching and fluxing techniques, and estimates the critical cooling rate for glass formation.

Contribution

It demonstrates the fabrication of larger diameter amorphous ferromagnetic alloys and estimates the critical cooling rate needed for their formation.

Findings

Amorphous rods up to 2.5 mm diameter were synthesized.

Fluxing technique enables larger amorphous samples.

Critical cooling rate estimated at approximately 100 K/s.

Abstract

Ferromagnetic bulk amorphous Fe40Ni40P14B6 alloy rods with a diameter of 1.2 mm can be prepared by means of a rapid quenching technique. If a fluxing technique is also used, amorphous rods with a diameter as large as 2.5 mm can be synthesized. The critical cooling rate Rc for the glass formation Fe40Ni40P14B6 is estimated to be on the order of 100 K.s-1