Roy, Soumitra ; Paul, Aloke (2013) Diffusion in tungsten silicides Intermetallics, 37 . pp. 83-87. ISSN 0966-9795
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Official URL: http://doi.org/10.1016/j.intermet.2013.01.014
Related URL: http://dx.doi.org/10.1016/j.intermet.2013.01.014
Abstract
Experiments are conducted in the W-Si system to understand the diffusion mechanism of the species. The activation energies from integrated diffusion coefficients are calculated as 152 ± 7 and 301 ± 40 kJ/mol in the WSi2 and W5Si3 phases, respectively. In both the phases, Si has a much higher diffusion rate compared to W. This is not surprising to find in the WSi2 phase, if we consider the number of nearest neighbors for both the elements in the crystal. The diffusion of W in this phase indicates the presence of W antisites. The faster diffusion rate of Si in the W5Si3 phase indicates the presence of higher concentration of vacancies on the Si sublattice compared to W sublattice.
Item Type: | Article |
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Source: | Copyright of this article belongs to Elsevier Science. |
ID Code: | 121248 |
Deposited On: | 13 Jul 2021 07:12 |
Last Modified: | 13 Jul 2021 07:12 |
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