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Author(s): |
Chang-yin Zhu, college of materials and metallurgy, Guizhou University, Guizhou, China
Quan Xie, College of science, Guizhou University, Guizhou, China
Ting-hong Gao, College of science, Guizhou University, Guizhou, China |
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Abstract: |
A molecular dynamics simulation has been performed on the solidification process of liquid metal Ge by adopting the Stillinger-Weber potentials at three different cooling rates. Through the pair correlation function，bond-type index method, self-diffusion coefficient D(T), the microstructures have been analyzed during rapid solidification processes. It is found that random network amorphous solids are formed at the cooling rate of 1×1012K/s, 1×1013K/s and 1×1014K/s. The influence of cooling rate on the system is only shown under 1000K. At lower cooling rate, the bond angle, coordination number and bond type are more close to the crystal structure of Ge, and crystallization occurs more obvious.
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