| Original Articles |
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Different Cooling Rate Dependences of Different Microstructure Units in Aluminium Glass by Molecular Dynamics Simulation
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| LIU Chang-Song;ZHU Zhen-Gang;XIA Jun-Chao;SUN De-Yan |
| Laboratory of Internal Friction and Defects in Solids, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031 |
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| Cite this article: |
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LIU Chang-Song, ZHU Zhen-Gang, XIA Jun-Chao et al 2000 Chin. Phys. Lett. 17 34-36 |
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Abstract Constant-pressure molecular dynamics simulation and the pair analysis technique have been performed to study the microstructural evolution of aluminium during rapid solidification. The microstructure characteristics of icosahedral ordering increase with decrease of the cooling rate, whereas the microstructure unit characteristics of hcp crystalline structure decrease. There are two kinds of microstructure units which are similar to those in the fcc crystal containing interstitialcies. These two kinds of microscopic units are nearly independent of the cooling rate. The microscopic structural unit characteristics of fcc crystalline structure do not depend on the cooling rate either. These results may help us understand the microstructure of glass and its stability.
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| Keywords:
61.43.Bn
61.72.Hh
81.05.Kf
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Published: 01 January 2000
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| PACS: |
61.43.Bn
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(Structural modeling: serial-addition models, computer simulation)
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61.72.Hh
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(Indirect evidence of dislocations and other defects (resistivity, slip, creep, strains, internal friction, EPR, NMR, etc.))
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81.05.Kf
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(Glasses (including metallic glasses))
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