Crystalline state transition features of aluminum-based amorphous alloys at thermal and mechanical treatment

Abstract

he influence of obtaining conditions and additional alloying La and Co on features of amorphous alloy Al86Y8Ni6 crystallization was investigated by DSC and DMA techniques. It is defined that partial replacement of yttrium by a lanthanum (50/50) or partial replacement of nickel by cobalt (50/50) contributes to thermal stability promotion of amorphous state due to increasing of the crystallization temperature and magnification of the crystallization activation energy. The defined dependences for properties evolution of amorphous alloys in consequence of thermal treatment modes are explained in the frameworks of the amorphous state polycluster model. Keywords: aluminum alloys, amorphous state, alloying, thermal stability, dynamical mechanical analysis.