Amorphization of Zr/Ni Bilayers by Ion-Beam-Mixing

The amorphization process induced by ion-beam-mixing was studied for the Zr/Ni bilayer system by means of the RBS/channelling and CEMS techniques. The number of atoms mixed per one incident atom was found to be the same for ~100 K and 300 K irradiations, whereas it was increased by the factor of 2.5 for 500 K irradiation what indicates, that the change in the mixing mechanism occurred above room temperature. The results show that amorphization of the Zr/Ni system is controlled by the number of mixed atoms and depends on the irradiation temperature. A change in CEMS spectra was observed at ~770 K what suggests that recrystallization of the amorphous phase occurs at this temperature.