On equilibrium vacancy concentration in iron-hydrogen alloys

The authors developed a statistic theory of solid iron-hydrogen alloys considering interaction of hydrogen with the vacancies for improving A. A. Smirnov’s theory. The authors estimated the energy of formation of the complexes with different number of hydrogen atoms “from the first principles”. They gave the quantitative evaluation of concentration of such complexes depending on the temperature and influence of mutual interaction of the vacancies with hydrogen on their equilibrium concentration.