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Author(s): |
Ting-hong Gao, College of Science, Guizhou University, Guiyan, China
Quan Xie, College of Science, Guizhou University, Guiyan, China
Chang-yin Zhu, College of Science, Guizhou University, Guiyan, China
Rang-su Liu, School of Physics and Microelectronics Science, Hunan University, Changsha, China
Li-li Zhou, School of Physics and Microelectronics Science, Hunan University, Changsha, China |
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Abstract: |
A simulation study has been performed for the solidification of liquid Ca7Mg3 alloy at different cooling rates by molecular dynamics method. The pair distribution function g(r) curves and the cluster-type index method were used to analyze the changes of cluster structures during rapid solidification processes. The results show that Ca7Mg3 has very good glass forming ability, and amorphous structures are formed mainly with the basic cluster (12 0 12 0) at the cooling rate of 1×1011K/s, 1×1012K/s, 1×1013K/s and 1×1014K/s. The effects of cooling rate on the structure during solidification process of liquid Ca7Mg3 alloy is mainly reflected by changes in the number of the (12 0 12 0) basic clusters. The basic cluster (12 0 12 0) plays a key role in forming amorphous structure during rapid solidification processes. At lower cooling rate, more number of the (12 0 12 0) basic clusters are formed, which make the amorphous structure more stable.
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