Abstract
In this work, (Zr55Cu30Al10Ni5)100−xScx (x = 0, 0.5, 1.0, and 1.5) amorphous alloys were fabricated through steel die casting. The effects of scandium on the properties of zirconium-based amorphous alloys have been studied. The results show that the glass-forming ability of amorphous alloys increases at first and then decreases with the increase of Sc content. The highest glass-forming ability is obtained when the atomic fraction of Sc is 0.5%, which enables the production of 2-mm-thick amorphous alloy ingots. Meanwhile, the thermal stability and mechanical properties of the alloy are optimised with the atomic fraction of Sc of 1.0%. In addition, by adding an appropriate amount of Sc, the corrosion resistance of Zr–Cu–Al–Ni alloys is enhanced, particularly in the acid solution. The lowest average corrosion rate for samples in acid solution is obtained with the alloy containing atomic fraction of Sc of 1.0%. Therefore, results of this study indicate that the Zr-based amorphous alloy containing scandium has the potential for manufacturing fracture internal fixation or surgical devices.
CHARACTERIZATION OF AMORPHOUS ALLOY Co87Nb46B15
