Characterization of Mg-rich clusters in the C36 phase of the Mg-5Al-3Ca-0.7Sr-0.2Mn alloy

被引：19

作者：

Rzychon, Tomasz ^{[1
]}

机构：

[1] Silesian Tech Univ, Fac Mat Sci & Met, Dept Mat Sci, PL-40019 Katowice, Poland

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2014年 / 598卷

关键词：

Magnesium alloys; Mg-Al-Ca-Sr alloys; TEM; STEM; XRD; C36; phase; MECHANICAL-PROPERTIES; AS-CAST; MAGNESIUM ALLOY; AL; MICROSTRUCTURE; SOLIDIFICATION; ADDITIONS; EQUILIBRIA; BEHAVIOR; SYSTEM;

D O I：

10.1016/j.jallcom.2014.02.029

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In this paper, characterization of clusters embedded in the C36 eutectic phase using TEM, STEM and XRD methods is presented. Disk-shaped Mg-rich clusters with sizes less than 150 nm were observed in the sand-cast Mg-5Al-3Ca-0.75r-0.2Mn alloy. The composition of the C36 eutectic phase was 24.1Mg-47.2Al-27.8Ca-0.95r and that of the Mg-rich clusters was 53.1Mg-33Al-13.1Ca-0.8Sr in at.%. The lattice parameters of the C36 phase were determined to be a(0) = 5.827 angstrom and c(0) = 18.834 angstrom, whereas for the clusters they were determined to be a(0) = 5.586 angstrom and c(0) = 18.834 angstrom. The chemical compositions of the eutectic phase and clusters, and the decrease of the lattice parameters with increasing magnesium content in the C36 phases suggest that Mg atoms occupy both Al and Ca sites in the C36 phase. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：95 / 105

页数：11

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