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This paper presents a finding of producing nanoparticle dispersed bulk glassy alloys in a Cr-modified Pd-Cu-Ni-P (PCNP) system by using a copper-mold casting technique. The PCNP alloys with the compositions near Pd 40 Cu 30 Ni 10 P 20 possess high glass-forming ability (GFA) resulting from their exceptionally small nucleation rate. Cr additions in Pd 40 Cu 30-x Ni 10 P 20 Cr x (x = 1-5 at%) alloys result in homogenous nucleation of Ni 33 Cr 33 P 34 when these Alloys are solidified from liquid state. The composition of the remaining liquid changed to that near Pd 40 Cu 30 Ni 10 P 20 by the precipitation of Ni 3 Cr 33 P 34 and the matrix can be easily solidified to a glassy phase, leading to the formation of a mixed structure consisting of nanoscale Ni 33 Cr 33 P 34 particles embedded in a glassy phase. The particle size is significantly affected by alloy composition and cooling rate.

Bulk Glassy Pd-Cu-Ni-Cr-P Alloys Containing Dispersed Nanoparticles Prepared by Copper-Mold Casting