Repeated crystallization in undercooled Zr41Ti14Cu12Ni10Be23 liquids

Isothermal crystallization studies are performed on Zr41Ti14Cu12Ni10Be23 me lts. Undercooling experiments are carried out repeatedly at 907, 860, and 7 50 K. The scattering of the time to reach the onset of crystallization is i nvestigated. Results from experiments performed at 907 K show a large scatt er of the onset time of crystallization. For the experiments carried out at 860 and 750 K, scattering of the onset time is two orders of magnitude sma ller. These results indicate that, at high temperatures, the crystallizatio n is governed by the time scale of the statistical nucleation events. At lo w temperatures, the crystallization is controlled by diffusion, resulting i n a well-defined onset time for crystallization. (C) 2000 American Institut e of Physics. [S0003-6951(00)00117-0].