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Equations of Order–Disorder Kinetics in Alloys with B. C. C. and F. C. C. Lattices. Tetrahedron Approximation
Author(s) -
Bakai A. S.,
Fateev M. P.
Publication year - 1990
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221580107
Subject(s) - tetrahedron , superposition principle , atom (system on chip) , vacancy defect , kinetic energy , cluster (spacecraft) , order (exchange) , kinetics , physics , thermodynamics , quantum mechanics , crystallography , condensed matter physics , chemistry , computer science , programming language , embedded system , finance , economics
The kinetic equations describing the order‐disorder in alloys with b. c. c. and f. c. c. lattices are derived taking into account atom correlation. The consideration is based on the master equation using a superposition approximation. It is supposed that atom movements are controlled by a vacancy mechanism. For the first time, the closed kinetic equations describing the kinetics of ordered alloys with b. c. c. and f. c. c. lattices in four‐particle tetrahedron approximation are obtained. As clusters the tetrahedron atom configuration is chosen. For the system in a stationary state the equations obtained give the same results as a variation cluster method.