Applications of Diffusion

Being such a broad topic, it's rather hard to approach the subject of applications of diffusion; as diffusion is not often used as a tool, but rather it is a phenomenon which has to be dealt with. A few of the topics listed below deal directly with materials processing applications, and a few may be surprising.

Carborization

Diffusion Bonding

Diffusion in Geology

Diffusion in Vegetables

Heat treatment of metals

Helium Diffusion in Stars

Sintering

The Human Body