Abstract
An Au42In42Yb16 alloy has been studied by transmission electron microscopy in as-cast and melt-spun conditions. The as-cast alloy was found to contain a cubic 2/1 approximant phase (along with another crystalline phase) with lattice parameter 2.46 nm and space group P a over(3, ̄). Electron diffraction features of this phase have been described. An icosahedral quasicrystal formed on melt-spinning. Differential thermal analysis indicates that the quasicrystalline phase is stable above 525 °C, until melting. Annealing at temperature 550 °C improves the quality of the quasicrystal, while annealing at 450 °C shows transformation to a microcrystalline state. At both temperatures, a 1/1 cubic approximant phase separates out.
Original language | English |
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Pages (from-to) | 991-994 |
Number of pages | 4 |
Journal | Materials Science and Engineering A |
Volume | 448-451 |
DOIs | |
Publication status | Published - 2007 Mar 25 |
Keywords
- Interfaces
- Melting
- Nanoparticles
- Orientation relationship
- Quasicrystal
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering