Results 221 to 230 of about 162,544 (259)

Rigidity, Connectivity, and Glass‐Forming Ability

Journal of the American Ceramic Society, 1993
Following the ideas of Zachariasen and of Cooper, it is argued that the glass‐forming ability of a system can be rationalized in terms of the degrees of freedom available to form an infinitely large topologically disordered network composed of rigid structural units connected at vertices, edges, or faces.
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Correlation between fragility and glass-forming ability/plasticity in metallic glass-forming alloys

Applied Physics Letters, 2007
In the present study, the authors draw attention to the relationship among fragility index (m), glass-forming ability (GFA), and plasticity in various metallic glass-forming alloys (MGAs), and show that the m value is closely related to both characteristics.
E. S. Park, J. H. Na, D. H. Kim
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METALLIC GLASS FORMING ABILITY

1985
The present knowledge of thermodynamic and kinetic factors influencing the metallic glass forming ability GFA are discussed essentially from a thermodynamic point of view. The different attempts to calculate the free energy difference between the undercooled liquid and the crystalline phase at the glass temperature T g are presented.
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Analysis of thermodynamic behaviour of bulk metallic glass forming melts and glass forming ability

Journal of Thermal Analysis and Calorimetry, 2009
The thermodynamic behaviour of bulk metallic glass (BMG) forming melts have been studied by analyzing the temperature dependence of the Gibbs free energy difference (∆G), entropy difference (∆S) and enthalpy difference (∆H)between the undercooled melt and the corresponding equilibrium solid phases.
P. K. Singh, K. S. Dubey
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Reduced glass transition temperature and glass forming ability of bulk glass forming alloys

Journal of Non-Crystalline Solids, 2000
Abstract Onset temperature (solidus) T m and offset temperature (liquidus) T l of melting of a series of bulk glass forming alloys based on Zr, La, Mg, Pd and rare-earth elements have been measured by studying systematically the melting behaviour of these alloys using DTA or DSC. Bulk metallic glass formation has been found to be most effective
Lu, Z.P., Li, Y., Ng, S.C.
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Glass forming ability of materials: A thermodynamic approach

Journal of Non-Crystalline Solids, 2009
Abstract The glass forming ability of materials has been studied on the basis of the critical cooling rate (Rc) for the glass formation. The study is made by obtaining an analytical expression for the nose temperature (Tn) of the time–temperature–transformation (T–T–T) diagram using the expressions for the thermodynamic quantities Gibbs free energy ...
Rajesh K. Mishra, K.S. Dubey
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Identify the best glass forming ability criterion

Intermetallics, 2010
Understanding glass formation and predicting glass forming ability (GFA) are vitally important and they are long-standing challenges in the metallic glasses community. Recently, a number of criteria have been developed to evaluate GFA, based mainly on fitting the experimental data of the critical cooling rate for glass forming.
Sheng Guo, Z.P. Lu, C.T. Liu
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On the parameters to assess the glass forming ability of liquids

Journal of Non-Crystalline Solids, 2005
Abstract A new parameter has been proposed to assess the glass forming ability of liquids and its effectiveness is compared with the existing parameters. The new parameter ( α  =  T x / T l ), which incorporates both the factors of stability of the liquid (a low T l ) and the thermal stability of glass (a high T x ), has good correlation with ...
K. Mondal, B.S. Murty
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A critical analysis of the glass-forming ability of alloys

Journal of Non-Crystalline Solids, 2009
Several empirical rules have been proposed during the past few years to synthesize bulk metallic glasses. But, the real reasons for the improved glass-forming ability of these alloys are still not clear and the ability to design alloy compositions to enable synthesis of larger diameter rods has not improved.
C. Suryanarayana, I. Seki, A. Inoue
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Correlation between volumetric change and glass-forming ability of metallic glass-forming alloys

Applied Physics Letters, 2008
We draw attention to the relationship between volumetric change and glass-forming ability (GFA) in various metallic glass-forming alloys. The critical cooling rate can be expressed as Rc=2.5×10−5exp(5.0×102Vlg), where Vlg is defined as (Vl-Vg)∕Vl.
E. S. Park, D. H. Kim
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