AN INITIATIVE OF CRAFT REVIVAL TRUST.  Since 1999
Diffusion

Metal

Diffusion

Diffusion

The movement of one type of element through another without reaction. Many of the important processes in metallurgy are controlled by diffusion. During solidification, the rate of diffusion of the elements in liquid ahead of a freezing front control whether the solid grows in planar, cellular or dendritic manner. In the solid state, many phase formation, and growth processes are controlled by diffusion. These diffusion controlled processes can be suppressed by rapid-cooling (quenching).