FORMATION OF INTERMEDIATE ORDERED STATES
ON SPINODAL DECOMPOSITION OF ALLOYS

I. K. Razumov

UDC 669.112:53.091

A model of diffusion phase transformations in alloys with 
a tendency toward ordering is suggested. It accounts for the vacancy 
mechanism of diffusion and the possible competition of the processes 
of ordering and decomposition. It is shown that the spinodal decomposition 
into components A and B from a homogeneous initial state may pass 
through the stage of formation of isolations of the ordered phase, 
with their stability being qualitatively increased in the region of 
low temperatures. The growth of colonies on decomposition of a metastable 
ordered state has been investigated.

Institute of Quantum Material Science, 62-26 Chelyuskintsev 
Str., Ekaterinburg, 620107, Russia; email: iraz@k66.ru. Translated 
from Inzhenerno-Fizicheskii Zhurnal, Vol. 81, No. 4, pp. 789-795, 
July-August, 2008. Original article submitted December 12, 2006; 
revision submitted January 15, 2008.