Journal
SCRIPTA MATERIALIA
Volume 59, Issue 8, Pages 866-869Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2008.06.033
Keywords
magnesium alloys; microstructure; precipitation; interface structure; facet
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Funding
- National Natural Science Foundation of China [50671051]
- National Basic Research Program of China (973 Program) [2007CB613704]
- National Center for Nano Science and Technology of China
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The morphology and orientation of polygonal Mg2Sn precipitates in a Mg-Sn-Mn-Si alloy were characterized using transmission electron microscopy. The precipitates exhibit four pairs of facets. While three pairs of them are not parallel to any low-indexed plane, each facet is normal to particular Delta g's. Based on a detailed constrained coincidence site lattice and mismatch analysis of the structures in the interfaces, the orientations of these facets can be explained in terms of a relatively high density of near-coincident site lattice points. (c) 2008 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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