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.
Bibliographical noteFunding Information:
This work was supported by the Creative Research Initiatives of the Korean Ministry of Science and the Korea Research Foundation Grant funded by the Korean Government (MOEHRD), No. KRF-2006-214-D00066. The author is indebted to Prof. Frans Spaepen, Harvard University for thoughtful advice.
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys