Solid-Phase Interaction in Powder Mixtures of Nickel with Aluminum

The characteristics of solid-phase interaction of 3Al + Ni and 3Ni + Al powder mixtures under annealing conditions at a temperature T = 693 K were studied by experimental and theoretical methods. The isothermal annealing time was varied from 1 to 400 h. The influence of initial porosity on the growth kinetics of the Ni2Al3 phase and on the volumetric changes in the 3Al + Ni powder mixture was studied. The constants that characterize the phase nucleation and growth kinetics in a dispersed powder mixture of nickel and aluminum were determined by the inverse problem method.