THE DECOMPOSITION OF SUPERSATURATED AL1-XSIX SOLID-SOLUTIONS

The decomposition kinetics of supersaturated FCC Al1-xSix solid soluti ons has been studied in the wide concentration range x less-than-or-eq ual-to 0.1 by the resistivity relaxation method and the differential s canning microcalorimetry technique. It was established by an original 'set of steps' isothermal annealing procedure that the spinodal bounda ry probably occurs at x congruent-to 0.08 in these substances and the last stages of the decomposition process correspond to coagulation wit h DELTArho approximately t-1/5 behaviour at intermediate temperatures.