Crystallization of amorphous Zr_(70)Cu_(30-x)Ni_x alloys

摘要

X－ray diffraction (XRD)and differential scanning calorimetry(DSC) were employed to investigate the influence of Ni content on the crystallization of amorphous Zr70Cu30-xNix(atom fration in%) alloys,Experimental results show that with the Ni content increasing the activation energies for crystallization of amorphous Zr70Cu30-xNix alloys increase correspondingly,indicating that the thermal stability is greatly improved.All the DSC traces of amorphous Zr70Cu30-xNix alloys exhibit two exothermic peaks,suggesting that the crystallization process via a double-stage ticles,while the second one corresponds to the precipitaion of nano-scale Zr2Ni phase and crystallization of residual amporphous phase,The mechanism on the crystallization of amorphous Zr70Cu30-xNix alloys was discussed.