Abstract
(a)PhysicsDepartmentoftheUniversityofCoimbra,P-3000Coimbra,Portugal(b)LSG2M,UMRCNRS7584,EcoledesMines,F-54042NancyCedex,France(ReceivedApril3,2000;inrevisedformSeptember20,2000;acceptedSeptember21,2000)Subjectclassification:64.70.Nd;S1.1;S1.2The solubility of tin is significantly extended by mechanical alloying in near equiatomic Fe–Cralloys. The influences of Sn concentration and of grain size on the kinetics of formation of thes-phase have been studied using different techniques. The s-phase formation is much faster foras-milled alloys than it is for conventional alloys. The s-phase formation rate decreases with theincrease of Sn concentration in alloys with nanometer-sized grains as it does in coarse-grainedalloys.Themechanismswhichareresponsiblefortheslowing-downofthea–s transformationaredifferentinbothkindsofalloys.
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