Abstract
Diffusion induced grain boundary migration (DIGM) has been investigated in more than 35 systems, however, the nature of the driving force, kinetic behavior and mechanism is still unclear. In the present study, the Ni(Cu) system was chosen to investigate the kinetic behavior of DIGM since many results concerning DIGM in this system have been reported and the thermodynamic data for Ni-Cu alloys are widely available. Some differences with respect to the DIGM kinetic behavior in previous work can be directly compared. These experimental results showed that the GB migration by DIGM exhibits various transition stages, involving nucleation, nonlinear and linear migration stages. On the basis of these findings, some of the problems related to quantification of DIGM in the literature can be reasonably interpreted and solved.
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