Structural Transitions of Amorphous Alloys under High Pressure

An attempt is made in this paper to cover the results of the recent experimental investigations on the effects of high pressure on the crystallization of amorphous Fe-17at.% B, Nb-19at.% Si and Pd-20at.% Si alloys. Pressure is shown to raise appreciably the onset temperature of crystallization and change the structural sequence of crystalline phases forming in the alloys. The phases preferentially forming are the DO_e-type Fe_3B, Al5-type Nb_3Si and bct Si-rich phase. The structural characteristics of these transformations are discussed in the light of the knowledge of atomic structure of the amorphous alloys