Abstract
Aluminium-based amorphous powders of A185Ni5Y10 and A188.5Ni8Mm3.5 were produced by high-pressure gas atomization. Since the amorphous A185Ni5Y10 alloy exhibits the glass transition before crystallizaion, the extrusion of the A185Ni5Y10 amorphous powder was performed at temperatures below crystallization temperature(Tx). The resulting extruded bulk consists mainly of an amorphous phase and the compressive strength is as high as 1052MPa. On the other hand, the amorphous A188.5Ni8Mm3.5 powder without glass transition was extruded at temperatures above Tx and the highest tensile strength reached 94OMPa for the extruded bulk with a finely mixed structure of Al11(Ce, La)3 and Al3Ni embedded in an aluminium matrix.
