Lei de Crescimento em Função da Posição para Ligas do Sistema Monotético

Monotectic alloys show promising applications in wear-resistant automotive components. Much research has been devoted in order to better comprehend monotectic reactions. Some researches assume that the interphase spacing evolution in monotectic alloys follows the classical relationship used for eutectics or the dendritic growth relationship. However, some studies reported that the aforementioned growth laws seem not to be valid for some cases.  In the present study, the results of directional unsteady-state solidification experiments with hypomonotectic Al-0.9wt%Pb and Al-5.5wt%In, monotectic Al-1.2wt%Pb and hypermonotectic Al-5.0wt%Bi, Al-7.0wt%Bi and Al- 2.1wt%Pb alloys, under different heat extracting configurations ( upward and downward) were taken into account to propose a new and exclusive growth law for monotectic systems. It was possible to establish a single monotectic growth law as a function of position from the metal/mold interface