Transport and Surface Properties of Molten Cd-Zn Alloys

Simple statistical theory has been used to report the thermo-physical properties of mixing in liquid Cd-Zn alloys. The energetic of mixing in liquid alloys has been analyzed through the study of surface properties (surface tension, surface concentration) and transport properties (diffusivity, viscosity). Negative deviation from Raoultian behaviour has been observed in the computed mixing parameters (viscosity, surface tension) of the alloys. The computed results support a weak phase-separation tendency in molten Cd-Zn system.Journal of Institute of Science and Technology, 2014, 19(1): 14-18

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Effects of surface coordination of atoms on the surface properties of Cd-X (X= Ga, Zn) liquid alloys

Himalayan Journal of Science and Technology ◽

10.3126/hijost.v2i0.25851 ◽

2018 ◽

Vol 2 ◽

pp. 90-95

Author(s):

Ishwar Koirala

Keyword(s):

Surface Tension ◽

Statistical Mechanics ◽

Surface Properties ◽

Order Parameter ◽

Surface Concentration ◽

Concentration Fluctuations ◽

Liquid Alloys ◽

Model Surface ◽

Mechanics Model ◽

Effect Of Surface

We have investigated the effect of surface coordination of atoms on the surface properties of Cd-Ga and Cd-Zn liquid alloys by varying their surface coordination fractions using statistical mechanics model. Surface tension and surface concentration did not have significant effect on the calculation of both surface tension and surface concentration of two alloys. The computation of the concentration fluctuations at the surface revealed that it was sensitive to the surface coordination fractions of both segregating systems. In those alloys we found that the computation of the Warren-Cowley short rang order parameter was influenced by the surface coordination fractions.

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Surface Properties of Ag-Cu-Zr Liquid Alloys in Relation to the Wettability of Boride Ceramics

Materials Science Forum ◽

10.4028/www.scientific.net/msf.512.211 ◽

2006 ◽

Vol 512 ◽

pp. 211-216 ◽

Cited By ~ 1

Author(s):

R. Novakovic ◽

Maria Luigia Muolo ◽

E. Ricci ◽

E. Ferrera ◽

D. Giuranno ◽

...

Keyword(s):

Surface Tension ◽

Surface Properties ◽

Surface Composition ◽

Point Of View ◽

Ceramic Substrate ◽

Work Of Adhesion ◽

Experimental Point ◽

Liquid Alloys ◽

Wetting Phenomena ◽

Angle Data

The wetting phenomena and adhesion between Ag-Cu-Zr molten alloys (where Zr is an active brazing element) and ZrB2-ceramic substrate have been investigated from theoretical and experimental point of view. The wetting phenomena of molten alloy/ceramic substrate depend on the bonding characteristics of liquid alloys and ceramics as well as the magnitude of interactive forces at the interface. Accordingly, the first step of this investigation is to determine the surface properties of Ag-Cu, Ag-Zr and Cu-Zr liquid alloys. The energetics of the bulk and the surface of liquid alloys have been analysed in the framework of statistical mechanical theory in conjunction with Quasi-Lattice Theory (QLT), through the study of the concentration dependence of various properties such as surface tension, surface composition, concentration fluctuations in the long wavelength limit and Warren-Cowley chemical short-range order parameter. Combining the Young and the Dupré equations, the obtained values of surface tension together with contact angle data have been used to calculate the work of adhesion.

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Microscopic and Surface Properties of K-Na Liquid Alloys

Himalayan Physics ◽

10.3126/hj.v4i0.9426 ◽

2013 ◽

Vol 4 ◽

pp. 40-45

Author(s):

I. Koirala ◽

B. P. Singh ◽

I. S. Jha

Keyword(s):

Surface Properties ◽

Order Parameter ◽

Short Range ◽

Short Range Order ◽

Energy Parameter ◽

Surface Concentration ◽

Liquid Alloys ◽

Range Order Parameter ◽

Temperature Dependent ◽

Long Wavelength

The deviation from ideal mixture behavior and concentration dependent symmetry in the microscopic and surface properties of K-Na liquid alloy is investigated within a simple statistical model. The concentration dependent of microscopic functions(concentration fluctuation in the long wavelength limit, Warren-Cowley short range order parameter) and surface properties(surface concentration and surface tension) has got special attention to show a tendency of like atom pairing in the mixture. The theoretical analysis reveals that energy parameter is temperature dependent, K-Na alloys is of weakly interacting system and K-atoms segregates on the surface of K-Na liquid alloys at bulk concentration of Na.The Himalayan Physics Vol. 4, No. 4, 2013 Page: 40-45 Uploaded date: 12/23/2013

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Surface Properties of Al–Fe–Si Liquid Alloy Using Thermodynamic Database

Journal of Nepal Physical Society ◽

10.3126/jnphyssoc.v6i2.34849 ◽

2020 ◽

Vol 6 (2) ◽

pp. 10-19

Author(s):

U. Mehta ◽

S. K. Yadav ◽

I. Koirala ◽

D. Adhikari

Keyword(s):

Surface Tension ◽

Ternary Alloy ◽

Binary Systems ◽

Excess Free Energy ◽

Surface Concentration ◽

Liquid Alloys ◽

Free Energies ◽

Temperature Dependent ◽

Excess Surface ◽

Good Agreement

Temperature-dependent interaction parameters for excess free energies of mixing of sub-binary systems of Al-Fe-Si ternary liquid alloys were optimised using the experiment data in the frame of Redlich-Kister (R-K) polynomials. These optimised parameters were then used to compute the partial excess free energy of sub-binary and ternary liquid alloys. The surface tension and surface concentration of sub-binary and the ternary liquid alloys were computed using Butler equation. The temperature dependent coefficients of R-K polynomials for excess surface tensions of the sub-binary systems were optimised which were then used to estimate the surface tension of ternary alloy using Chou, Kohler and Toop modelling equations at temperatures 1773, 1873, 1973 and 2073 K. The surface tension of the ternary alloy obtained using aforementioned models were found to be in good agreement from Fe and Al corners but some deviations were observed from Si corner.

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Thermo-physical properties of molten Cd-Ga alloys

BIBECHANA ◽

10.3126/bibechana.v10i0.9079 ◽

2013 ◽

Vol 10 ◽

pp. 9-19

Author(s):

RP Koirala ◽

BP Singh ◽

D Adhikari

Keyword(s):

Physical Properties ◽

Surface Properties ◽

Individual Component ◽

Surface Concentration ◽

Molten State ◽

Chemical Approach ◽

The Individual ◽

Thermo Physical Properties

We report thermodynamic, microscopic and surface properties of Cd-Ga alloys in molten state at 700 K. We use quasi-chemical approximation for the computation of thermodynamic and microscopic properties. For the computation of surface we use Butler’s approach and quas-chemical approach. We also calculate the surface concentration of the individual component. DOI: http://dx.doi.org/10.3126/bibechana.v10i0.9079 BIBECHANA 10 (2014) 9-19

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Increasing Storage Modulus, Contact Angle and Surface Tension of Airway Mucus Increases Clearance by Simulated Cough Through a Model Trachea

ASME 2010 Summer Bioengineering Conference, Parts A and B ◽

10.1115/sbc2010-19703 ◽

2010 ◽

Author(s):

Anpalaki J. Ragavan ◽

Cahit A. Evrensel ◽

Peter Krumpe

Keyword(s):

Surface Tension ◽

Contact Angle ◽

Storage Modulus ◽

Surface Properties ◽

Respiratory Diseases ◽

Interactive Effects ◽

Altered Surface ◽

Human Trachea ◽

Tension Increase ◽

And Storage

Altered surface and viscoelastic material properties of mucus during respiratory diseases have a strong influence on its clearance by cilia and cough. Combined effects of the surface properties (contact angle and surface tension) and storage modulus with relatively unchanged viscosity on displacement of the simulated mucus aliquot during simulated cough through a model adult human trachea is investigated. For the mucus simulants used in this study contact angle and surface tension increase significantly as storage modulus increase while viscosity remains practically unchanged. Displacement of mucus simulant aliquots increased significantly with increasing storage modulus (and contact angle) at a given cough velocity in the range between 5 meters/second (m/s) and 30 m/s with duration 0.3 s. Results suggest that the interactive effects of elasticity and surface properties may help facilitate mucus displacement at low cough velocities.

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