Results 261 to 270 of about 216,525 (294)

Exceptionally high glass-forming ability of an FeCoCrMoCBY alloy

Applied Physics Letters, 2005
It has been well documented that the maximum thickness of as-cast glassy samples attainable through conventional metallurgical routes is the decisive criteria for measuring the glass-forming ability (GFA) of bulk metallic glasses (BMGs). Here we report the exceptionally high GFA of an FeCoCrMoCBY alloy which can be fabricated in the form of glassy rods
J. Shen, Q. J. Chen, J. F. Sun, H. B. Fan, G. Wang   +4 more
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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
openaire   +1 more source

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.
openaire   +1 more source

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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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
openaire   +1 more source

Prediction of glass-forming ability for metallic systems

Journal of Non-Crystalline Solids, 1978
Abstract The relative glass-forming ability (GFA) of metallic alloys is considered in terms of a parameter ΔT ∗ = (T liq mix − T liq )/T liq mix , which represents the departure of the alloy liquids temperature, Tliq, from that of the simple rule of mixtures liquids temperature, Tliqmix. For values of
I.W. Donald, H.A. Davies
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Glass Forming Ability Criterion

Materials Science Forum, 1987
Mohammed Saad, Marcel Poulain
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