What question did this study set out to answer?

Investigate how systematic variations in aluminum concentration influence the structural and dynamical properties of aluminum-magnesium melts across different temperatures.

November 1, 2024Transactions of Nonferrous Metals Society of ChinaOpen Access

Structure-controlled slow dynamics in Al-Mg melts

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Investigate how systematic variations in aluminum concentration influence the structural and dynamical properties of aluminum-magnesium melts across different temperatures.
Employed molecular dynamics simulations to evaluate the composition-dependent transport properties of aluminum-magnesium alloys across systematic aluminum variations.
Analyzed atomic arrangements, nearest-neighbor bonding preferences, partial static structure factors, and icosahedral cluster populations across varying temperatures.
Viscosity of Al67Mg33 abnormally surpassed that of Al85Mg15 below 550 K, reversing the behavior observed at higher temperatures.
Structural analyses revealed preferential Al-Mg bonding in first neighbor shells and mutual repulsion in second neighbor shells, producing prepeaks in partial static structure factors.
Icosahedral cluster formation accounted for the dynamic slowdown but was suppressed in Al-rich compositions due to an insufficient number of Mg atoms required to geometrically stabilize the clusters.

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Implication

Molecular dynamics simulation reveals anomalous low-temperature viscosity crossover in aluminum-magnesium melts, highlighting geometric and chemical drivers of icosahedral ordering.

Cite This Study

Huang et al. (2024) studied this question.

synapsesocial.com/papers/6aad0b688af625b841dc0803 https://doi.org/10.1016/s1003-6326(24)66620-3

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Implication

Molecular dynamics simulation reveals anomalous low-temperature viscosity crossover in aluminum-magnesium melts, highlighting geometric and chemical drivers of icosahedral ordering.

Structure-controlled slow dynamics in Al-Mg melts

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Implication

Cite This Study

Structure-controlled slow dynamics in Al-Mg melts

Key Points

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Implication

Cite This Study

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