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Roles of alloying additions on local structure and glass-forming ability of Cu–Zr metallic glasses.
- Source :
- Journal of Materials Science; Jan2014, Vol. 49 Issue 2, p496-503, 8p, 4 Charts, 5 Graphs
- Publication Year :
- 2014
-
Abstract
- To identify the structural role of alloying element M (M = Ti, Ga, Co, Fe) on the glass-forming ability (GFA) of Cu <subscript>50</subscript>Zr <subscript>50</subscript> base alloy, the atomic structures of the binary and ternary metallic glasses were examined by extended X-ray absorption fine structure (EXAFS) spectroscopy. The EXAFS curve-fitting analysis indicates that the main structural difference among the metallic glasses is in the atomic packing density of Cu-centered clusters. The relative shortening of the Cu–M distance is closely related to the heat of mixing between Cu and M: the more negative the heat of mixing, the larger is the shortening of the Cu–M distance. Based on a systematic analysis of the component properties and GFA data for Cu–Zr based alloys, it is suggested that alloying elements that bring a more uniform distribution of atomic size and possess strong chemical interactions with the main components should be selected in developing large-size bulk metallic glasses. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00222461
- Volume :
- 49
- Issue :
- 2
- Database :
- Complementary Index
- Journal :
- Journal of Materials Science
- Publication Type :
- Academic Journal
- Accession number :
- 92866157
- Full Text :
- https://doi.org/10.1007/s10853-013-7725-7