Interface enhanced glass forming ability under ion mixing/solid-state reaction in an immiscible Hf-Ta system

Hf-Ta multilayered films were designed to consist of a total of six layers which added enough interfacial free energy to elevate the initial energetic level of the films to surpass that of the amorphous state. In these multilayered films, amorphization was indeed achieved by room-temperature 200 keV xenon ion irradiation, as well as by room-temperature aging, in a broad composition range from Hf26Ta74 to Hf90Ta10, showing a significant enhancement of the glass forming ability by the interfaces. Moreover, an Hf26Ta74 amorphous alloy was also obtained by thermal annealing of the multilayered films at 315 deg. C for 3 h. (author). Letter-to-the-editor