EFFECT OF COOLING RATE ON THE ATOMIC STRUCTURE OF Al75Co25 METALLIC GLASS
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- TITLE: EFFECT OF COOLING RATE ON THE ATOMIC STRUCTURE OF Al75Co25 METALLIC GLASS
- ABSTRACT: In the present study, the effect of cooling rate on the atomic structure and glass formation process of Al 75Co25 metallic glass was investigated with a series of classical molecular dynamics simulations based on the embedded atom method. The effects of the cooling rate on the atomic structure of the system were discussed in detail using various analysis methods. It has been observed that the cooling rate has a significant effect on the volume and energy of the system, as well as the glass transition temperature is lower in the slower cooled system. We observed a splitting in the second peak of the simulated total (or partial) pair distribution functions, which is a characteristic behavior for metallic glasses. According to the results of the pair analysis method, 1431 and 1541 bonded pairs were the most dominant pairs at high temperatures, and a significant increase was observed in 1551 bonded pairs around the glass transition region with decreasing temperature. We observed that the fraction of them increased when the system was cooled more slowly, indicating that the cooling rate has a significant effect on the formation of the icosahedral order.
- PAGES: 76-
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