Interatomic repulsion softness directly controls the fragility of supercooled metallic melts
Abstract
Bulk metallic glasses are the most promising materials in many technological applications thanks to their mechanical properties. The stability and thermoelasticity of supercooled liquid metals is encoded in the temperature dependence of the viscosity at the glass transition: the fragility. Although with colloidal glasses it has been possible to explain the fragility in terms of the softness (or its inverse, the steepness) of the microscopic interparticle potential, the same could not be done with metals due to the complex interatomic interaction. Here we solve this problem and propose a new methodology which provides the missing analytical link between fragility and interatomic potential in metals. Our results show that the same scenario found earlier with colloidal glasses applies to metals too.
- Publication:
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Proceedings of the National Academy of Science
- Pub Date:
- November 2015
- DOI:
- arXiv:
- arXiv:1510.08117
- Bibcode:
- 2015PNAS..11213762K
- Keywords:
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- Condensed Matter - Soft Condensed Matter;
- Condensed Matter - Disordered Systems and Neural Networks;
- Condensed Matter - Materials Science
- E-Print:
- available at http://www.pnas.org/content/early/2015/10/23/1503741112