Electrical resistance based on quantum phase changes applied to al-zn alloy, in its pre- precipitation stage

Abstract

A scheme based on the method of quantum phase changes is proposed to find the electrical resistivity of an AlZn alloy, considering the participation of the different dispersion centers as these structural changes are occurring. The state density for the different configurations was calculated using the MATERIALS STUDIO software, while the alloy was simulated considering an aluminum supercell to which solute atoms are substitutionally incorporated. Under this calculation scheme, the resistivity associated to Zn clusters forming GP zones showed an anomalous behavior, which is consistent with the data reported in the literature. This anomaly is a consequence of the variation of quan tum phases changes in the Fermi level, product of the appearance of crystalline forms or clusters that change the density of states according to the particular size of the considered cluster.