ABSTRACT
As shown in Figure 3.7, by determining the fraction transformed over successive times (or temperatures), the standard
"S" -shaped fraction transformed versus time curve can be generated.
Under limiting conditions, the area under a DTA peak, may be considered proportional to the change in enthalpy (constant pressure) or change in internal energy (constant volume) from the latent heat of a transformation. At first, this does not seem intuitive since the integration of !:lT over time or temperature does not yield units of energy. The original experimental configuration by Borchardt and Daniels [3] consisted of reactive and nonreactive fluids as sample and reference, respectively. These were stirred for temperature uniformity, as shown in Figure 3.8.
