Phase separation and improved plasticity by modulated heterogeneity in Cu-(Zr,Hf)-(Gd,Y)-Al metallic glasses

作者：Park E S^*; Kyeong J S; Kim D H

来源：Scripta Materialia, 2007, 57(1): 49-52.

DOI：10.1016/j.scriptamat.2007.03.008

• Cu-(Hf,Zr)-(Gd,Y)-Al alloys
• metallic glass
• heterogeneity
• phase separation
• plasticity

The effect of replacement of Zr/Hf with Gd or Y in Cu46Zr47Al7 and Cu50Hf42.5Al7.5 alloys has been investigated. Phase separation into Cu-Gd-rich (or Cu-Y-rich) and Cu-Zr-rich (or Cu-Hf-rich) amorphous phases occurs during cooling when the Gd (or Y) content is above 15 at.% in Cu-(Zr, Hf)-(Gd, Y)-Al alloys. In particular, it was realized that the plasticity in bulk metallic glass with heterogeneity can be enhanced either by tailoring the combinations of the constituent elements or by controlling the cooling rate.

• 出版日期2007-7