Nanocrystallization of amorphous Fe73.5Cu1Nb3Si13.5B9 irradiated by laser

The surface nano crystallization of amorphous Fe73.5Cu1Nb3Si13.5B9 radiated by CO2 lager was studied by means of Mossbauer spectroscopy, transmission electron microscope and X ray diffraction. The result shows that under certain technical conditions, nanocrystalline is formed on the surface of amorphous Fe73.5Cu1Nb3Si13.5B9 radiated by laser; the crystallization phase is alpha-Fe(Si) crystalline, and its size is about 10-20 nm; the nanocrystalline is uniformly distributed on amorphous base to keep the amorphous and crystallized phase in balance; the amount of crystallization reaches 23% when the laser power is 300 W, the diameter of light spot is 20 mm, and the radiation speed is 20 mm/s. The phase balance can be controlled by adjusting the laser technology parameter. Laser radiation on the amorphous Fe73.5Cu1Nb3Si13.5B9 alloy is an important technique for surface nanocrystallization of the amorphous alloys.