Deformation behavior of Ni-based bulk metallic glass synthesized by spark plasma sintering

Abstract

We report the deformation behavior of the Ni-based bulk metallic glass (BMG) by spark plasma sintering of amorphous powders, which have been prepared by a gas atomization. By spark plasma sintering of amorphous powders in the supercooled liquid region, a fully Ni-based BMG was successfully synthesized. Full densification was achieved by the viscous flow of the amorphous powders in the supercooled liquid region during consolidation process. The strength of about 2.4 GPa was obtained in the consolidated BMG, which is comparable to that of the as-cast BMG (2.6 GPa). The consolidated Ni-based BMG shows similar super-plastic behavior to the as-cast BMG, indicating that possibility of deformation in the supercooled liquid region. (c) 2006 Elsevier B.V. All rights reserved.