New Stable Icosahedral Al-Cu-Ru and Al-Cu-Os Alloys
- 1 September 1988
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 27 (9A) , L1587
- https://doi.org/10.1143/jjap.27.l1587
Abstract
A thermodynamically stable quasi-crystalline single phase with an icosahedral structure was found to be formed at atomic compositions of Al65Cu20Ru15 and Al65Cu20Os15 in conventionally solidified and fully annealed states as well as in a rapidly solidified state. The quasi-crystalline nature determined by X-ray diffractometry is the highest for the fully annealed ingot, indicating the existence of a truly equilibrium icosahedral structure. The stable quasi-crystals appear to have a growth morphology of pentagonal dodecahedron with an average size of 0.03 mm in a fully annealed state.Keywords
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