Analysis of thermodynamic parameters of glass forming metallic melts

1997 ◽  
Vol 50 (5-6) ◽  
pp. 843-856 ◽  
Author(s):  
R. K. Mishra ◽  
K. S. Dubey
Keyword(s):  
Thermodynamic Parameters ◽  
Glass Forming ◽  
Metallic Melts

Effect of component substitution on the atomic dynamics in glass-forming binary metallic melts

2017 ◽  
Vol 96 (5) ◽  
Author(s):  
B. Nowak ◽  
D. Holland-Moritz ◽  
F. Yang ◽  
Th. Voigtmann ◽  
Z. Evenson ◽  
...  
Keyword(s):  
Glass Forming ◽  
Metallic Melts ◽  
Component Substitution

scholarly journals Calculating glass-forming ability in absence of key kinetic and thermodynamic parameters

2010 ◽  
Vol 97 (2) ◽  
pp. 024102 ◽  
Author(s):  
Donghua Xu ◽  
Brian D. Wirth ◽  
Jan Schroers ◽  
William L. Johnson
Keyword(s):  
Thermodynamic Parameters ◽  
Glass Forming Ability ◽  
Kinetic And Thermodynamic Parameters ◽  
Glass Forming

The Effect of Solute on the homogeneous Crystal Nucleation Frequency in Metallic Melts

1981 ◽  
Vol 9 ◽  
Author(s):  
C.V. Thompson ◽  
F. Spaepen
Keyword(s):  
Regular Solution Model ◽  
Solute Concentration ◽  
Crystal Nucleation ◽  
Qualitative Comparison ◽  
Glass Forming ◽  
Nucleation Frequency ◽  
Homogeneous Crystal ◽  
Complete Calculation ◽  
Metallic Melts ◽  
Approximate Expressions

ABSTRACTWe have made a complete calculation that extends the classical theory for crystal nucleation in pure melts to binary alloys. Using a regular solution model, we have developed approximate expressions for the free energy change upon crystallization as a function of solute concentration. They are used, together with model-based estimates of the interfacial tension, to calculate the nucleation frequency. The predictions of the theory for the maximum attainable undercooling are compared with existing experimental results for non-glass forming alloys. The theory is also applied to several easy glass-forming alloys (Pd-Si, Au-Si, Fe-B) for qualitative comparison with the present experimental experience on the ease of glass formation, and for assessment of the potential for formation of the glass in bulk.

Evaluation of Glass-Forming Ability for Metallic Melts by Phase Field Approach

2012 ◽  
Vol 490-495 ◽  
pp. 3129-3133 ◽  
Author(s):  
Gang Wang ◽  
De Chang Zeng ◽  
Zhong Wu Liu
Keyword(s):  
Phase Field ◽  
Amorphous Alloys ◽  
Solid Phase ◽  
Glass Forming Ability ◽  
Transformation Kinetics ◽  
Field Approach ◽  
Glass Forming ◽  
Temperature Transformation ◽  
Metallic Melts ◽  
Solid Phase Transition

Evaluation of glass-forming ability (GFA) is important in the development of amorphous alloys. Based on phase field theory, the kinetic model of liquid-to-solid phase transition is build, and the time-temperature-transformation (TTT) diagram is plotted according to the phase field simulations of isothermal phase transformation kinetics for a model system. Furthermore, the critical cooling rate for glass formation is calculated on the basis of the TTT curve and is taken as the intrinsic criteria of reflecting the GFA for metallic melts.

Sm-based Sm–Al–Ni ternary bulk metallic glasses

2007 ◽  
Vol 22 (3) ◽  
pp. 573-577 ◽  
Author(s):  
J. Wu ◽  
Q. Wang ◽  
J.B. Qiang ◽  
F. Chen ◽  
C. Dong ◽  
...  
Keyword(s):  
Heating Rate ◽  
Thermodynamic Parameters ◽  
Metallic Glasses ◽  
Bulk Metallic Glasses ◽  
Intersection Point ◽  
Trigonal Prism ◽  
Constant Composition ◽  
Suction Casting ◽  
Glass Forming

The Sm-based Sm–Al–Ni glass-forming system was investigated using our e/a- and cluster-related criteria. Three bulk metallic glasses (BMGs) Sm54Al23Ni23, Sm56Al22Ni22, and Sm58Al21Ni21 were obtained by suction casting into rods with a diameter of 3 mm. All of them shared a constant e/a = 1.5 and fell along the e/a-constant composition line in the ternary composition chart. The Sm54Al23Ni23 BMG exhibiting the largest Trg was located at the intersection point of the e/a-constant line and the Sm7Ni3-Al cluster line, with thermodynamic parameters of Tg = 548 K at a heating rate of 20 K/min, Tg/Tm = 0.634, and Tg/Tl = 0.615. The Sm7Ni3 cluster was a capped trigonal prism derived from the SmNi phase.

scholarly journals Microscopic insight into the origin of enhanced glass-forming ability of metallic melts on micro-alloying

2015 ◽  
Vol 107 (13) ◽  
pp. 131901 ◽  
Author(s):  
C. J. Chen ◽  
A. Podlesnyak ◽  
E. Mamontov ◽  
W. H. Wang ◽  
S. M. Chathoth
Keyword(s):  
Glass Forming Ability ◽  
Glass Forming ◽  
Metallic Melts ◽  
Insight Into

Thermodynamics and kinetics of stable and metastable phases in the Ni–Zr system

1994 ◽  
Vol 9 (3) ◽  
pp. 598-616 ◽  
Author(s):  
G. Ghosh
Keyword(s):  
Thermodynamic Parameters ◽  
Physical Property ◽  
Rapid Quenching ◽  
Growth Theory ◽  
First Order ◽  
Glass Forming ◽  
Crystal Transformation ◽  
Kinetics Of ◽  
Good Agreement ◽  
Stable And Metastable Phases

The thermodynamic parameters of all stable phases in the Ni-Zr system are reported in this paper. The available experimental data are taken into account in deriving the interaction parameters of various phases. The Ni7Zr2, Ni21Zr8, Ni11Zr9, NiZr, and NiZr2 phases are treated as stoichiometric. The solid solubility of the Ni5Zr, Ni3Zr, and Ni10Zr7 phases are described using a two sublattice model. The calculated thermodynamic properties and the phase diagram are in good agreement with the experimental ones. The thermodynamic parameters, along with the classical nucleation and crystal growth theory, have been used to explain the formation of metastable noncrystalline and crystalline phases upon rapid quenching of the liquid alloys. It has been demonstrated that even without any prior knowledge of the physical property, such as glass transition or crystallization temperature and thermodynamic property, such as the enthalpy of amorphous → crystal transformation of the amorphous alloy, it is possible to make a reasonably good “first order prediction” of the glass-forming range in a binary system. The experimentally determined glass-forming range in the Ni-Zr system is found to be in good agreement with the predicted one.

A slow atomic diffusion process in high-entropy glass-forming metallic melts

2018 ◽  
Vol 51 (14) ◽  
pp. 145301 ◽  
Author(s):  
Changjiu Chen ◽  
Kaikin Wong ◽  
Rithin P Krishnan ◽  
Jan P Embs ◽  
Suresh M Chathoth
Keyword(s):  
Diffusion Process ◽  
Atomic Diffusion ◽  
High Entropy ◽  
Glass Forming ◽  
Metallic Melts
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