Title: The kinetics of hydrogen-induced diffusive phase transformations in Sm₂Fe₁₇ alloys

Authors: Victor A. Goltsov, Elena A. Dodonova, Sergey B. Rybalka, Konstantin P. Skokov, Yury G. Pastushenkov

Addresses: Physics Department, Donetsk National Technical University, 83000, 58, Artem Str., Donetsk, Ukraine. ' Physics Department, Donetsk National Technical University, 83000, 58, Artem Str., Donetsk, Ukraine. ' Physics Department, Donetsk National Technical University, 83000, 58, Artem Str., Donetsk, Ukraine. ' Magnetism Department, Tver State University, 170000, 33, Zhelyabova Str., Tver, Russia. ' Magnetism Department, Tver State University, 170000, 33, Zhelyabova Str., Tver, Russia

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.

Keywords: kinetics; hydrogen; hydrogen induced phase transformations; SM2Fe17 alloys.

DOI: 10.1504/IJNHPA.2009.023826

International Journal of Nuclear Hydrogen Production and Applications, 2009 Vol.2 No.1, pp.42 - 54

Published online: 13 Mar 2009 *

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