Effect of rare earth element Nd addition on glass transition and crystallization of liquid Mg100-xNdx alloys
Source abstract
Abstract
Molecular dynamics simulations were conducted to examine the impact of composition on the phase transition of liquid Mg 100-xNd x alloys (Nd content x = 5∼80) during rapid solidification. The findings indicate a predominant role of topologically close-packed (TCP) structures over icosahedral structures in stabilizing the undercooled liquid. The increasing Nd content initially raised the glass transition temperature ( T g), which then stabilized at approximately 700 K until x ≥ 70, and then crystallization happens. This effect was attributed to the enhanced formation of TCP structures by Nd until x > 25, accompanied by a concurrent retardation in the dynamics of the system with increasing Nd addition. This dual action maintained the T g or facilitated crystallization. Consequently, the highest glass-forming ability of the system was observed at x = 25 due to the interplay of structural and dynamic factors. These results provide valuable insights into the underlying micro-mechanisms of the impact of rare earth element addition on the phase transition behaviors of liquid alloys.
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Research context
OpenAlex topics: Metallic Glasses and Amorphous Alloys · Quasicrystal Structures and Properties · Material Science and Thermodynamics
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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