Structure-forming principles for amorphous metals

Miracle, D.B.; Senkov, O.N.; Sanders, W.S.; Kendig, K.L.

doi:10.1016/j.msea.2003.10.130

Cited by 34 publications

(26 citation statements)

References 36 publications

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“…[2][3][4] However, it has been realzed that ''purely'' amorphous materials rarely exist in nature, with atomic interaction, atomic packing efficiency, and structural relaxation playing an important role in the structure and stability of a vitreous solid. [5][6][7][8][9][10] From a historical perspective, Stockdale [11] originally suggested in 1935 that the compositions of eutectic points in binary alloys should correspond to simple whole-number ratios of each atomic species. This notion was supported by Hume-Rothery and Anderson in 1960, [12] who plotted the frequency of occurrence of binary eutectic compositions vs alloy stoichiometry and found clear maxima at compositions corresponding to whole-number ratios.…”

Section: Introductionmentioning

confidence: 99%

Prediction of Glass-Forming Compositions in Metallic Systems: Copper-Based Bulk Metallic Glasses in the Cu-Mg-Ca System

Laws

Shamlaye

Wong

et al. 2010

Metall Mater Trans A

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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 glassforming 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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Section: Introductionmentioning

confidence: 99%

Prediction of Glass-Forming Compositions in Metallic Systems: Copper-Based Bulk Metallic Glasses in the Cu-Mg-Ca System

Laws

Shamlaye

Wong

et al. 2010

Metall Mater Trans A

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show abstract

“…Similar to others topological models 2,[10][11][12] we propose that to obtain BMGs or glassy alloys, or even to pinpoint the best glass-former alloys within a composition range, it is necessary to avoid the topological stability range of competing crystalline compounds, either stable or metastable ones.…”

Section: Methodsmentioning

confidence: 53%

Topological Instability as a Criterion for Design and Selection of Easy Glass-Former Compositions in Cu-Zr Based Systems

et al. 2007

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In the present work we propose a new approach for predicting the best glass-former composition(s) in multi-component metallic glasses. By applying the criterion, a topological instability criterion proposed to predict the crystallisation behaviour of Al-based systems, we show that it is also successfully possible to reproduce compositional ranges where binary and ternary bulk metallic glasses (BMGs) have recently been obtained. Our results indicate that the good glass-former composition(s) lie(s) within fields of mutual and simultaneous topological instability of all the crystalline phases competing with glassy phase.

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“…The two-order parameter model of Tanaka [14], which describes the liquid with locally ordered structure embedded in a normal disordered liquid, suggests that the liquid becomes more stable against crystallization with an increase in the degree of SRO (fraction of the locally favored structure). The latter can be a result of the presence of efficiently packed clusters in the amorphous structure [23,35,36]. Topological studies [23,[35][36][37][38], supported by computer simulations [39], show that a set of preferred solute-to-solvent radius ratios produces efficient atomic packing at both local (nearest-neighbor atomic clusters) and medium-range length scales.…”

Section: Resultsmentioning

confidence: 98%

Thermodynamic analysis of glass-forming ability in a Ca-Mg-Zn ternary alloy system

et al. 2006

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A thermodynamic analysis of the onset driving force for crystallization of super-cooled liquid has been conducted to explain strong composition dependency of the glass forming ability in the CaMg-Zn ternary alloy system observed experimentally. In addition to the onset driving force, other energetic and kinetic factors are discussed to explain the observed glass stabilities. The universality of this method is discussed, thus establishing an analytic approach for determining the most stable glass in a given alloy system.

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Structure-forming principles for amorphous metals

Cited by 34 publications

References 36 publications

Prediction of Glass-Forming Compositions in Metallic Systems: Copper-Based Bulk Metallic Glasses in the Cu-Mg-Ca System

Prediction of Glass-Forming Compositions in Metallic Systems: Copper-Based Bulk Metallic Glasses in the Cu-Mg-Ca System

Topological Instability as a Criterion for Design and Selection of Easy Glass-Former Compositions in Cu-Zr Based Systems

Thermodynamic analysis of glass-forming ability in a Ca-Mg-Zn ternary alloy system

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