Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1636601 | Transactions of Nonferrous Metals Society of China | 2013 | 8 Pages |
Abstract
The phase equilibria in Mg-rich corner of Mg-Ca-Gd and Mg-Ca-Nd ternary systems at 400 °C were determined through the equilibrated alloy method by using XRD, SEM, EPMA and DSC. Partial isothermal sections in Mg-rich corner of Mg-Ca-Gd and Mg-Ca-Nd ternary systems at 400 °C were constructed from 13 alloys. A three-phase region of α-Mg, Mg41RE5 and Mg2Ca was determined in both ternary systems. It is formed by a similar ternary eutectic reaction Lâα-Mg+Mg2Ca+Mg41RE5 at 499.6 °C and 505.6 °C, respectively. It is found that the maximum solubility of Ca in Mg5Gd is 3.68% (molar fraction) and 3% of Gd can be dissolved in Mg2Ca in the Mg-Ca-Gd system at 400 °C. While in the Mg-Ca-Nd system the maximum solubility of Ca in Mg41Nd5 is 3.57% and 1.24% of Nd can be dissolved in Mg2Ca at 400 °C. Other three-phase equilibria existing in Mg-rich corner of Mg-Ca-Gd system are α-Mg+Mg5Gd+T and Mg5Gd+Mg2Ca+T and the three-phase equilibrium in Mg-rich corner of Mg-Ca-Nd system is Mg3Nd+Mg2Ca+ Mg41Nd5.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Hou-jun FEI, Guang-long XU, Li-bin LIU, Hong BO, Li-jun ZENG, Cui-ping CHEN,