Nanocrystallization characteristics of amorphous (Fe0.99Mo0.01)(78)B13Si9 and Fe78B13Si9 alloys treated by shock wave

It is found that these amorphous alloys have been transformed into crystall ine phase with grain size of 20-40 min after annealing at temperature from 450 (.) 550 degreesC for 30 min. Some new phases such as Fe3Si are observed and the lattice constant of alpha -Fe is shortened. These can not be expla ined by the previous theory about process of diffusion, nucleation and grow th of the crystals. Instead, we explain the experimental results by the mod el of free volume and shearing deposition. If properly applied, shock wave treatment of amorphous alloys would be a promising method for synthesizing new crystalline phases of multicomponent systems.