AI Article Synopsis
- The study explores a method called pulse current thermoplastic forming that uses joule heating to revitalize the atomic structure of a specific bulk metallic glass (BMG) composed of LaAlAgNiCo.
- The technique results in a sample with enhanced β-relaxation due to increased free volume, contrasting with sub-annealing which diminishes β-relaxation and separates it from α-relaxation.
- Overall, the findings suggest this method can effectively rejuvenate BMGs and contribute to understanding the connection between structural relaxations and the crystallization process.
Article Abstract
We use the pulse current thermoplastic forming technique based on joule heating to rejuvenate the atomic structure of a LaAlAgNiCo bulk metallic glass (BMG). The pulse-formed sample exhibits more pronounced β-relaxation than the as-cast one due to the increased free volume. Instead, the sub- annealing clearly weakens the β-relaxation and also makes it more isolated from the α-relaxation, showing contributions from free volume and preferred structure. However, both treatments exhibit little influence on the following α-relaxation and high temperature crystallization kinetics. Our results open an effective way to rejuvenate the structure of BMGs and provide an in-depth understanding of the relationship between structural relaxations and crystallization kinetics of BMGs.
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| http://dx.doi.org/10.1021/acs.jpcb.0c09848 | DOI Listing |
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