Abstract
Sulphur solubility in copper single crystals was studied by means of H 2-H 2S mixtures and S 35 tracers, from 600 to 960°C. The copper-sulphur solid solution characteristics were determined: sulphur atoms are distributed at random, the solubility enthalpy is −7.5 kcal/mole, the excess partial entropy of sulphur in solid solution is high ( S ̄ s v/R = 12.7 ) and leads to suggest that sulphur atoms are substitution atoms. These results are consistent with some sulphur segregation in dislocations. Our results are in good agreement with our previous results about sulphur diffusion in copper.
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