INVESTIGATION OF GLASS-FORMATION IN MODEL BINARY-SYSTEMS WITH DIFFERENT STATE DIAGRAMS

The glass formation in model binary melts with different types of phas e diagrams has been considered. Calculations of both the nucleation fr equency and relative quantity of a crystalline phase have been made wi thin the framework of a modified theory of homogeneous nucleation in b inary melts. The proposed theory takes into account the work associate d with fluctuations of component concentrations in the microvolume of alloy. Detailed computations give good predictions of an amorphyzation ability of alloys with concentrations near eutectics and absence of t his ability for alloys with the cigar-like state diagram at quenching rates of T = 10(6) K/s.