Precipitation During Ion Bombardment of Metals
During the ion implantation of a metal, two fundamental changes occur. First, the gradual addition of impurity atoms results in a gradual change in chemical composition; and second, atomic collision results in radiation damage. The final physical state of the metal then depends on the interplay between these two processes.
This paper reviews the physical mechanisms which influence the stability of precipitates under irradiation. A simple theoretical treatment will be outlined to describe the equilibrium conditions which are expected to exist during irradiation. The model will be applied to the case of alloy formation during ion implantation and the predictions illustrated by a number of experimental observations using the electron microscope.
KeywordsDislocation Density Solute Atom Irradiation Temperature Damage Rate Free Interstitial
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