| Abstract: | With the framework of a second order approximation of the Kirkwood, a study has been made of ordering in binary substitution alloys with B2 structure. Interatomic interactions in the first and second coordination spheres have been taken into account. It has been shown that an order—disorder phase transformation can be of the first or second kind, depending on the ratio of the ordering energies in the first and second coordination spheres (w and ) and their composition. The calculated configurational thermal capacity in the region of the Kurnakov point agree well with experimental data for /w=0.25.S. M. Kirov Ural Polytechnical Institute. Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 9, pp. 93–96, September, 1993. |
