Electron irradiation induced nano-crystallization in fe 77Nd 4.5B 18.5 metallic glass

Abstract

Phase transformation behavior in Fe 77Nd 4.5B 18.5 metallic glass during electron irradiation and thermal annealing was investigated. Crystallization from glassy phase during thermal annealing occurred in multi-stages forming α-Fe and several intermetallic compounds. Electron irradiation induced crystallization occurred at 298 K and nanostructure composed of α-Fe, Nd 2Fe 14B and Fe 17B 2 precipitates embedded in amorphous matrix was formed. The electron irradiation induced crystallization behavior was discussed by atomic displacement due to electron knock-on effect and atomic diffusion via free volume in amorphous phase. © 2005 The Japan Institute of Metals.