| Autor: |
Kristensen, W. Damgaard, Jensen, E. J., Cotterill, R. M. J. |
| Zdroj: |
Philosophical Magazine; August 1974, Vol. 30 Issue: 2 p229-243, 15p |
| Abstrakt: |
The dislocation theory of melting has been investigated by means of a pseudostatic computational model, employed previously to demonstrate the connection between dislocation density and the pair distribution function. The model has been used to investigate the changes in certain thermodynamic functions across the melting transition. Random dislocations were generated in an otherwise perfect f.c.c. model, according to the elastic equations, and the atoms in the core regions were subsequently permitted to relax. From atomic configurations representing crystals saturated with perfect dislocations, values for the latent heat of fusion, the entropy of fusion, and the melting temperature were obtained and found to be in reasonable agreement with experimental results for the noble gases. It is found that this agreement could be even better if the saturation was caused by partial dislocations of the Shockley type. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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