The precipitation process for a concentration of CoTi of super-saturated solutions of Cu-0.50 at.% Co-0.45 at.% Ti (Cu-1 at.%
CoTi) was studied through differential scanning calorimetry (DSC) and microhardness measurements. The analysis of the calorimetric
curves between the environmental temperature and 900 K shows the presence of only one exothermic reaction attributed to the
formation of CoTi particles in the matrix of copper. The energy of activation estimated by using the modified Kissinger method
came out much lower than the corresponding to the diffusion of the cobalt and titanium in copper. We may attribute this fact
to the strong contribution of the vacancies introduced by quenching.
We used the formalism of Johnson-Mehl-Avrami (JMA) to assess the kinetic parameters. The energetic and kinetic evaluations
and the molar heats of precipitation obtained from the isochor of van’t Hoff allow us to infer that the reaction corresponds
to the formation of CoTi precipitates. The isothermal kinetics of precipitation reaction could be represented satisfactory
by an overall kinetic function based in a macroscopic parameter (Vickers hardness). The kinetic parameters obtained from microhardness
model are in agreements with those obtained from DSC traces.