Inhomogeneous structure and glass-forming ability in Zr-based bulk metallic glasses

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dc.contributor.authorSun, YLen_AU
dc.contributor.authorQu, DDen_AU
dc.contributor.authorSun, YJen_AU
dc.contributor.authorLiss, KDen_AU
dc.contributor.authorShen, Jen_AU
dc.date.accessioned2010-03-23en_AU
dc.date.accessioned2010-04-30T05:03:43Zen_AU
dc.date.available2010-03-23en_AU
dc.date.available2010-04-30T05:03:43Zen_AU
dc.date.issued2010-01-01en_AU
dc.date.statistics2010-01-01en_AU
dc.description.abstractRecently, a series of quaternary Zr-based bulk metallic glasses (BMGs), i.e., Zr53Cu18.7Ni12Al16.3, Zr51.9Cu23.3Ni10.5Al14.3 and Zr50.7Cu28Ni9Al12.3, have been developed and their glass-forming ability (GFA) increases with Cu concentration. In this work, atomic structures of the three BMGs were rebuilt by reverse Monte Carlo simulations based on the reduced pair distribution functions measured by high energy X-ray diffraction. The results show that a certain amount of substitution of short Zr-Cu, Cu-Cu pairs with long Zr-Zr and Zr-Al pairs enhances the local denser packing of Kasper polyhedral centered by Zr and Al atoms. A cell sub-divided method is proposed to describe the fluctuation of local number density which is found to follow the normal distribution function. The largest possible free volume in the three alloys is found to approaches to 3.8 angstrom. For the three alloys, the enhancement of GFA with increasing Cu content is due to the increase in the fluctuation degree of local density instead of the dense packing. © 2010, Elsevier Ltd.en_AU
dc.identifier.citationSun, Y. L., Qu, D. D., Sun, Y. J., Liss, K. D., & Shen, J. Inhomogeneous structure and glass-forming ability in Zr-based bulk metallic glasses. Journal of Non-Crystalline Solids, 356(1), 39-45. doi:10.1016/j.jnoncrysol.2009.09.021en_AU
dc.identifier.govdoc1241en_AU
dc.identifier.issn0022-3093en_AU
dc.identifier.issue1en_AU
dc.identifier.journaltitleJournal of Non-Crystalline Solidsen_AU
dc.identifier.pagination39-45en_AU
dc.identifier.urihttp://dx.doi.org/10.1016/j.jnoncrysol.2009.09.021en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/2993en_AU
dc.identifier.volume356en_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectMonte Carlo Methoden_AU
dc.subjectMetallic glassesen_AU
dc.subjectAmorphous stateen_AU
dc.subjectZirconiumen_AU
dc.subjectCopperen_AU
dc.subjectAluminiumen_AU
dc.titleInhomogeneous structure and glass-forming ability in Zr-based bulk metallic glassesen_AU
dc.typeJournal Articleen_AU
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