Paper Titles
Modelling of the Gettering by Mechanical Damage of the Metallic Impurities in Silicon
p.27
Deep Trap Concentrations from Three-Dimensional Carrier Concentration Profiles in Hydride Vapor Pressure Epitaxially-Grown GaN
p.35
Slow Positron Studies of Defects in Si-Doped GaAs
p.51
Six-Jump-Cycle Mechanism for Collective Correlations in Nonstoichiometric Intermetallic Compounds
p.59
Vacancy-Wind Factors and Collective Correlation Factors in Nonstoichiometric B2 Intermetallic Compounds
p.69
Defect Densities Using the Positron Annihilation Doppler Broadening Technique in Wrought Alloys 3003 and 3005
p.79
Phenomenological Model for Creep Behaviour in Cu-8.5at%Al Alloy
p.89
Surface Microstructural Evolution up to Creep Rupture under the Power-Law Regime in Cu-8.5at%Al Alloy at Intermediate Temperatures
p.97
Effect of γ-Irradiation on the Mechanical Properties of Al-Cu Alloy
p.105

Vacancy-Wind Factors and Collective Correlation Factors in Nonstoichiometric B2 Intermetallic Compounds

Article Preview

Abstract:

The six-jump-cycle (6JC) diffusion mechanism is used to analyze the behavior of vacancy-wind factors and collective correlation factors in partially ordered B2 intermetallic compounds at stoichiometric and near- stoichiometric compositions. Expressions for the vacancywind factors are obtained in the framework of the four-frequency model where the two sublattices exist a priori. The phenomenological coefficients on the two sublattices that remain hitherto independent in 6JC mechanism are connected through a microscopic detailed balance condition. The present results for collective correlation factors when compared with our earlier calculation based on taking the harmonic mean of the sublattice correlation factors show much better agreement with Monte Carlo simulation results. The collective correlation factors and tracer correlation factors are used to calculate the vacancy-wind factors. Our results for vacancy-wind factors agree qualitatively with the simulation data when the frequency ratio ( α ) of structural and antistructural atoms jumps decreases up to the order of unity.

You might also be interested in these eBooks
Defects and Diffusion Ceramics Abstracts View Preview

Info:

Periodical:

Defect and Diffusion Forum (Volumes 251-252)

Pages:

69-78

DOI:

https://doi.org/10.4028/www.scientific.net/DDF.251-252.69

Citation:

Cite this paper

Online since:

March 2006

Authors:

K.L. Gosain, D.K. Chaturvedi, Irina V. Belova, Graeme E. Murch

Keywords:

Chemical Diffusion, Correlation Factors, Intermetallic, Ordered Alloys, Six-Jump-Cycle, Tracer Diffusion, Vacancy Wind

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

© 2006 Trans Tech Publications Ltd. All Rights Reserved

Share:

Citation:

References

[1] J.R. Manning, Diffusion Kinetics for Atoms in Crystals (Van Nostrand, Princeton NJ 1968).

Google Scholar

[2] G. E. Murch and Z. Qin, Defect and Diffusion Forum, 109-110 (1994), p.1.

Google Scholar

[3] G. E. Murch, in Diffusion in Crystalline Solids, edited by G. E. Murch and A. S. Nowick, Academic Press, Orlando Florida (1984), p.379.

Google Scholar

[4] G. E. Murch, in Phase Transformations in Solids, Material Science and Technology, Vol. 5, Chapter 2, edited by P. Haasen, VCH, Weinheim (1991), p.75.

Google Scholar

[5] I.V. Belova and G.E. Murch, Defect and Diffusion Forum, 213-215 (2003), p.95.

Google Scholar

[6] I.V. Belova and G.E. Murch, Defect and Diffusion Forum, 237-240 (2005), p.291.

Google Scholar

[7] I.V. Belova and G.E. Murch, Phil. Mag. A, 81 (2001), p.83.

Google Scholar

[8] I.V. Belova and G.E. Murch, Defect and Diffusion Forum, 179-180 (2000), p.1.

Google Scholar

[9] I.V. Belova and G.E. Murch, Phil. Mag. A, 82 (2002), p.285.

Google Scholar

[10] I.V. Belova and G.E. Murch, J. Phys. Condensed Matter, 14 (2002), p.9563.

Google Scholar

[11] K. L. Gosain, D. K. Chaturvedi, I.V. Belova and G.E. Murch, Defect and Diffusion Forum, 247-248 (2005), p.9.

DOI: 10.4028/www.scientific.net/ddf.247-248.9

Google Scholar

[12] K. L. Gosain, D. K. Chaturvedi, I.V. Belova and G.E. Murch, Defect and Diffusion Forum, in press.

Google Scholar

[13] I.V. Belova and G.E. Murch, Phil. Mag. A, 73 (1996), p.117.

Google Scholar

[14] H. Bakker, Phil. Mag. A, 40 (1979), p.525.

Google Scholar

[15] I.V. Belova and G.E. Murch, Defect and Diffusion Forum, 194-199 (2001), p.547.

Google Scholar

[16] M. Arita, M. Koiwa and S. Ishioka, Acta Metall., 37 (1989), p.1363.

Google Scholar

[17] R. Drautz and M. Fahnle, Acta Mater, 47 (1999), p.2437.

Google Scholar

[18] A.R. Allnatt and A.B. Lidiard, Atomic Transport in Solids (Cambridge University Press, London 1993).

Google Scholar

[19] G.E. Murch and I.V. Belova, Defect and Diffusion Forum, 194-199 (2001), p.533.

Google Scholar