Abstract
The rate of volume diffusion in
polycrystals of tin, as indicated by the darkening of photographic films, is in
general agreement with the previous measurements of the rate of self-diffusion
in different crystallographic directions. The rate of diffusion along the grain
boundaries is generally considerably higher than that of volume diffusion
except when the boundary is that between twins or between crystals of similar
orientations. These observations are discussed in terms of recent theories of
the grain boundary and the vacancy mechanism of diffusion.
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10 articles.
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