Repeated crystallization in undercooled Zr41Ti14Cu12Ni10Be23 liquids
Repeated crystallization in undercooled Zr41Ti14Cu12Ni10Be23 liquids
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DOI：
10.1063/1.126340
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发表时间：
2000-04-24
影响因子：
4
通讯作者：
Busch, R
中科院分区：
文献类型：
--
作者：
Schroers, J;Johnson, WL;Busch, R
对 Zr41Ti14Cu12Ni10Be23 熔体进行等温结晶研究。在 907、860 和 750 K 下重复进行过冷实验。研究了达到结晶开始的时间分布。在 907 K 下进行的实验结果显示结晶开始时间存在很大的分散性。对于在 860 和 750 K 进行的实验，起始时间的分散要小两个数量级。这些结果表明，在高温下，结晶受统计成核事件的时间尺度控制。在低温下，结晶是通过扩散控制的，从而产生明确的结晶起始时间。 (C) 2000 年美国物理研究所。 [S0003-6951(00)00117-0]。
Isothermal crystallization studies are performed on Zr41Ti14Cu12Ni10Be23 melts. Undercooling experiments are carried out repeatedly at 907, 860, and 750 K. The scattering of the time to reach the onset of crystallization is investigated. Results from experiments performed at 907 K show a large scatter 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 smaller. These results indicate that, at high temperatures, the crystallization is governed by the time scale of the statistical nucleation events. At low temperatures, the crystallization is controlled by diffusion, resulting in a well-defined onset time for crystallization. (C) 2000 American Institute of Physics. [S0003-6951(00)00117-0].