Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1601403 | Intermetallics | 2009 | 8 Pages |
Abstract
Electron-probe microanalysis (EPMA) and X-ray diffraction (XRD) studies conducted on Mg–38 wt%Ce and Mg–66 wt%Ce alloys demonstrated the existence of two distinct intermetallic phases, Mg3.6Ce, Mg3Ce, with the compositions Mg3.6–3.7Ce, Mg3.0–3.2Ce, respectively. XRD indicates that Mg3.6Ce is likely a defect-vacancy structure of Mg3Ce. The μ-Mg3Ce phase, with the Mg3.0–3.3Ce composition and a possible orthorhombic structure, has also been discovered, which is considered a metastable high-temperature form of the Mg3Ce phase. Based on these results a version of the phase diagram is suggested for the Mg–Ce system in the composition range of 38–70 wt%Ce which correlates well with the solidification microstructures and phases of the two alloys.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
X. Zhang, D. Kevorkov, M.O. Pekguleryuz,