Flaky amorphous powders in Fe-, Co- and Al-based systems prepared by a two-stage quenching technique

Abstract

Al 84Ni 10Mm 6, Co 70.5Fe 4.5Si 10B 15 and Fe 69Cr 8P 13C 10 amorphous powders were produced by the two-stage quenching technique consisting of high-pressure gas atomization followed by centrifugal spinning. These amorphous powders have a flaky morphology with a disk or ellipsoidal shape and small thicknesses of about 0.5 to 4 μm and large aspect ratios of about 20 to 300. The flaky amorphous powders possess an enhanced engineering potentiality, because of the unique morphology as well as the useful properties inherent to their amorphous phase.