Prediction of Glass-Forming Compositions in Metallic Systems: Copper-Based Bulk Metallic Glasses in the Cu-Mg-Ca System |
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Authors: | Kevin J Laws Karl F Shamlaye Kenneth Wong Bulent Gun Michael Ferry |
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Affiliation: | (1) Australian Research Council Centre of Excellence for Design in Light Metals, School of Materials Science and Engineering, University of New South Wales, Sydney, 2052, Australia |
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Abstract: | A novel methodology for predicting specific compositions for glass-forming alloys based on efficiently packed atomic cluster
selection, liquidus lines, and ab initio calculations is presented. This model has shown applicable adaptation to many known metallic and ceramic oxide glass-forming
systems and has led to the discovery of soon to be reported Ag- and Zn-based bulk metallic glasses (BMGs). As a model system,
glass formation in the Cu-Mg-Ca ternary system has been assessed using this alloy design methodology, which has led to the
discovery of a number of Cu-based BMGs with compositions ranging from Cu-33 to 55 at. pct, Mg-18 to 45 at. pct, and Ca-18
to 36 at. pct. Included in this work are the calculated values of associated cluster binding energies and correlations between
physical and thermal properties of these glassy compositions, which show significant physical evidence to support the likely
existence of such clusters. |
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Keywords: | |
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