Thermally Activated Motion of Diffuse Interfaces by Self-Diffusion

4 Thermally Activated Motion of Diffuse Interfaces by Self-Diffusion 

Diffuse interfaces of certain types can move by means of self-diffusion. One example is the motion of diffuse antiphase boundaries which separate two ordered regions arranged on different sublattices (see Fig. 18.7). Self-diffusion in ordered alloys allows the different types of atoms in the system to jump from one sublattice to the other in order to change the degree of local order as the interface advances. This mechanism is presented in Chapter 18. 

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