Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1503513 | Scripta Materialia | 2006 | 4 Pages |
Abstract
First-principles calculations of three Laves phase structures at Al2Ca and Al2Mg compositions predict the existence of Al2(Mg,Ca) Laves phase. To validate this prediction, a diffusion couple between Mg–30 wt.%Ca alloy and pure Al was assembled and heat-treated at 688 K for 2 weeks. From the cross section of the diffusion couple, backscatter electron microscopy coupled with electron probe microanalysis indicated the existence of Al2(Mg,Ca). Two Laves phases, i.e. C36-Al2(Mg,Ca) and C14-Al2(Mg,Ca), were identified by indexing the electron backscatter diffraction pattern with predicted lattice parameters by first-principles calculations and by diffraction analysis using transmission electron microscopy independently.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Yu Zhong, Jing Liu, Ron A. Witt, Yong-ho Sohn, Zi-Kui Liu,