Adeitivity and isokinetic behavior in relation to particle dissolution

摘要

Additivity and isokinetic behavior in relation to particle dissolution have been examined. As a starting point, the analytical time dependent solutions for dissolution of plate-like and spherical precipitates in an infinite matrix have been manipulated and rewritten in a state variable form. The validity of these solutions during continuous heating and cooling is then checked against more exact numerical calculations based on the control volume approach. It is concluded that the state variable formulation, which represents an extension of the isokinetic concept, provides an adequate description of the dissolution process under conditions where there solutions are valid, except in cases where back diffusion leads to transient particle growth.