The effect of Be addition on the formation of quasicrystalline phases in Al-rich Al-Mn(-Be) alloys has been investigated. A metastable icosahedral quasicrystalline phase was found to form in a 93.5Al-5Mn-1.5Be (in wt%) alloy prepared by a conventional casting technique, indicating that the addition of Be to Al-Mn alloys improves the quasicrystal forming ability. The icosahedral phase in conventionally cast Al-Mn-Be alloys forms in the undercooled melt with the equilibrium growth morphology of the pentagonal dodecahedron. Heat treatment at 540 °C for 100 h results in the precipitation of small platelets of a two-dimensional quasiperiodic phase in the α-Al matrix. These precipitates have an orientation relationship with the α-Al matrix.
|Number of pages||5|
|Journal||Journal of Non-Crystalline Solids|
|Publication status||Published - 2004 Mar 15|
|Event||8th International Conference on Quasicrystals - Bangalore, India|
Duration: 2002 Sept 8 → 2002 Sept 13
Bibliographical noteFunding Information:
The authors are grateful for the financial support by the Creative Research initiatives of the Korean Ministry of Science and Technology.
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Ceramics and Composites
- Condensed Matter Physics
- Materials Chemistry