EAN: 9783960670988

MODELING THE LATTICE PARAMETERS OF SOLID SOLUTI...

In this book  models for the prediction of lattice parameters of substitutional and
interstitial solid solutions as a function of concentration and temperature are presented. For
substitutional solid solutions  the method is based on the hypothesis that the measured lattice
parameter versus concentration is the average of the interatomic spacing within a selected
region of a Bravais lattice. The model is applied on Ni-Cu and Ge-Si solid solutions. For the
interstitial solid solution of the Fe-C system  the method is based on the assumption that the
change in lattice parameter of the pure Fe phase is due to the occupation by carbon atoms to
the octahedral holes in the fcc austenite  and bct martensite. The model of lattice parameter
versus temperature for both substitutional and interstitial solid solutions is based on the
relative change in length and vacancy concentration at lattice sites that are in thermal
equilibrium. Combinations of both models then facilitate the calculation of lattice parameters
as a function of concentration and temperature. The results are discussed accordingly.

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