Thermodynamic analysis of the clustering in the Al_(90)Fe_7Nb_3 alloy

摘要

The devitrification of the rapidly quenched Al_(90)Fe_7Nb_3 alloy was studied by the use of the differential scanning calorimeter, differential thermal analyzer, X-ray difractometer and the transmission electron microscope. The heat capacity of the ribbon was related to that of its master alloy and to the capacities of the Al, Al_3Fe and Al_3Nb components. The results were interpreted by the two-type cluster model of the alloy structure. The dominant Al-Fe bond is preserved up to 1770 K.