Temperature and concentrational dependences of the enthalpy and heat capacity of solid Al1-xSix alloys

An adiabatic drop-calorimeter was used to measure changes in the enthalpy H -0(T)-H-0(T-b) of hypoeutectic Al1-xSix alloys (with Si concentrations x = 0, 1.92, 6.26, and 9.22 wt %) and of the commercial cast alloy AL5M (x appr oximate to 5.0 wt %) in a temperature range of 350-1200 K relative to the " basis" temperature T-b = 293.15 K. Based on the experimental data obtained, heat capacities of Al1-xSix alloys in the solid state were calculated.