Abstract

The influence of the hydrostatic pressure on the mean time of stay of interstitial carbon atoms in α-iron was determined by measuring the time decrease of permeability. This influence was found to be very small at temperatures from 239°K up to 253°K. The corresponding activation volume is negligible. It is concluded that Keyes' semi-empirical relationship between activation energy and activation volume does not hold for this case, no more than for solid solutions of nitrogen in α-iron.

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