Diffusion in Evaporated Films of Magnesium-Aluminium

Vaccum deposition can easily produce metal films of uniform thickness. When two such metal films are deposited, one over the other, and the resulted double layer film is annealed, diffusion will occur at the
common interface, resulting in the formation of either
a solid solution, or intermetallic compounds or both.
The presence of the diffusion layers can be confirmed
by electron-diffraction, or X-ray diffrection or deduced from othe measurements, such as electrical resistance or adhesion.