The kinetics of hydrogen-induced diffusive phase transformations in Sm<sub align=right>2Fe<sub align=right>17 alloys

Abstract

The kinetics of hydrogen-induced direct and reverse phase transformations in Sm2Fe17 alloys have been investigated. It is shown that a decrease in temperature leads to a significant slowdown of the direct and reverse phase transformations' evolution. It has been specified that these phase transformations proceed by the mechanism of nucleation and growth. Isothermal kinetic diagrams of both direct and reverse phase transformations have been plotted and the activation energy values for these hydrogen-induced phase transformations have been defined. It is shown that phase transformation kinetics in the interval of the temperatures under study is controlled by a mutual diffusion of the alloy's components.