Study on crystallization kinetics of binary alloys through model colloidal mixtures
Study on crystallization kinetics of binary alloys through model colloidal mixtures
复制标题
通过模型胶体混合物研究二元合金的结晶动力学
DOI：
10.1016/j.jallcom.2010.02.151
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发表时间：
2010-08
影响因子：
6.2
通讯作者：
Dai, Guoliang
中科院分区：
文献类型：
--
作者：
Lan, Ding;Duan, Li;Jiang, Heng;Hu, Yanping;Wei, BingChen;Dai, Guoliang
自非晶态合金被发现以来，非晶态合金的形成机制一直受到人们的广泛关注。对其内在机制的结构研究在直接结构表征方面遇到了挑战。结果表明，分散在溶剂中的胶体的相行为与原子和小分子的相行为在热力学上是等价的，但由于胶体的尺寸较大，可以用光学显微镜进行研究。在这项工作中，我们使用一个与已报道的二元大块金属玻璃的粒度比与原子比相当的二元胶体模型体系来研究拓扑对二元金属合金(铜-Hf和铜-锆系)晶化和非晶形成能力的影响。通过实时光学检测和光散射技术研究了该胶体体系的结晶动力学和结构。结果表明，胶体体系在混合比(组分)范围内存在两个限制区域，提高了玻璃形成能力，抑制了析晶动力学。模型系统的计算结果与二元大块非晶形成的实验数据相吻合，表明纯拓扑因素在决定非晶形成能力中起着重要作用。
Since the discovery of amorphous alloys, extensive attentions have been paid to understand the mechanism of glass-forming. The structural studies on its underlying mechanism have met challenge on direct structural characterization. It has been shown that the phase behavior of colloids dispersed in a solvent is thermodynamically equivalent to that of atoms and small molecules, however, colloids can be studied with optical microscopy due to their relatively large size. In this work, we use a binary colloidal model system with the particle size ratio comparable to atomic ratio of reported binary bulk metallic glasses to study the topological effect on crystallization and glass-forming ability of binary metallic alloys (Cu–Hf and Cu–Zr systems). The crystallization kinetics and structure of the colloid system were studied by real-time optical examination and light scattering technique. The results exhibit that there are two confined regions in the mixing ratio (composition) range in the colloid system with an enhanced glass-forming ability and retarded crystallization kinetics. The agreement between results of the model system and the experimental data on the binary bulk metallic glass formation suggests that purely topological factor plays an important role in determining the glass-forming ability.
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影响因子：
1.2
作者：
Inoue, A;Zhang, W
通讯作者：
Zhang, W
影响因子：
6
作者：
Y. M. Wang;C. Shek;J. Qiang;C. Wong;Weirong Chen;C. Dong
通讯作者：
Y. M. Wang;C. Shek;J. Qiang;C. Wong;Weirong Chen;C. Dong
影响因子：
64.8
作者：
PUSEY, PN;VANMEGEN, W
通讯作者：
VANMEGEN, W
影响因子：
5
作者：
Busch, R.;Schroers, J.;Wang, W. H.
通讯作者：
Wang, W. H.
影响因子：
5
作者：
Miracle, Daniel B.;Egami, Takeshi;Kelton, Kenneth F.
通讯作者：
Kelton, Kenneth F.