Thangaraj, N and Subbanna, GN and Ranganathan, S and Chattopadhyay, K (1987) Electron microscopy and diffraction of icosahedral and decagonal quasicrystals in aluminum-manganese alloys. In: Journal of Microscopy, 146 (3). pp. 287-302.
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Electron microscopy observations on the morphol. of icosahedral and decagonal quasicrystals in Al-Mn alloys were interpreted in favor of a heterogenous nucleation mode. The transition of icosahedral quasicrystals from nonfacetted dendrites to facetted particles occurs as a function of compn. While the variety of electron diffraction patterns expected from icosahedral quasicrystals was demonstrated for a no. of alloys, subtle intensity differences exist among analogous patterns from Al-Mn, Al-Cr, Al-Mn-Si, and Mg-Al-Zn-Cu alloys. Electron diffraction patterns from decagonal quasicrystals are understood on the basis of an edge-centered icosahedral as opposed to a vertex-centered icosahedron for icosahedral quasicrystals. Truncation from 2-dimensional quasicrystals is discussed.
| Item Type: | Journal Article |
|---|---|
| Publication: | Journal of Microscopy |
| Publisher: | John Wiley & Sons |
| Additional Information: | Copyright of this article belongs to John Wiley & Sons. |
| Department/Centre: | Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy) |
| Date Deposited: | 01 Jul 2008 |
| Last Modified: | 27 Aug 2008 13:29 |
| URI: | http://eprints.iisc.ac.in/id/eprint/14493 |
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