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HomeDefect and Diffusion ForumDefect and Diffusion Forum Vol. 354An Overview of the Interdiffusion Studies in Mo-Si...

An Overview of the Interdiffusion Studies in Mo-Si and W-Si Systems

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Abstract:

The growth of phases by reactive diffusion in Mo-Si and W-Si systems are compared. The crystal structures of MSi₂ and M₅Si₃ phases (M = Mo, W) are similar in these two systems. However, the diffusion rates of the components change systematically with a change in the atomic number. Integrated diffusion coefficients in both phases increase with an increasing atomic number of refractory elements i.e. from Mo to W. On the other hand, the ratio of diffusivities of the components decreases. This indicates a relative increase in the diffusion rates of the metal components with increasing atomic number and a difference in defects concentrations in these two systems.

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Periodical:

Defect and Diffusion Forum (Volume 354)

Pages:

79-83

DOI:

https://doi.org/10.4028/www.scientific.net/DDF.354.79

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Online since:

June 2014

Authors:

Soumitra Roy*, Soma Prasad, Aloke Paul

Keywords:

Defect, Reactive Diffusion, Silicides

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