The analysis of casting conditions of amorphous alloys

Abstract

Processing conditions of Fe40Ni40B20 amorphous ribbon, 10 mm in width, have been investigated by employing a single roll-casting method. To explore the conditions, the temperature of the melt, the angular velocity of the roll, and the ejection pressure of the melt were varied in turn while holding the other quenching parameters constant. The thickness of the as-quenched glassy ribbon increases monotonically with increase of ejection pressure and decreases monotonically with increase in roll speed. A mathematical treatment of the conditions for obtaining good-quality glassy ribbon has been attempted, and shows a good accord with the present experimental data.