Title

Al2(Mg,Ca) Phases In Mg-Al-Ca Ternary System: First-Principles Prediction And Experimental Identification

Keywords

First-principles calculation; Laves phase; Mg alloy; Phase identification

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. © 2006 Acta Materialia Inc.

Publication Date

9-1-2006

Publication Title

Scripta Materialia

Volume

55

Issue

6

Number of Pages

573-576

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1016/j.scriptamat.2006.03.068

Socpus ID

33745684801 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/33745684801

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