Nucleation of Al2Ca particles on Al2Nd phase in an Mg-Al-Ca-Nd alloy

被引：4
|
作者：
Liu, Fei [1 ]
Cui, Xiaoming [1 ]
Hou, Xiaohu [1 ]
Zhao, Xueping [1 ]
Bai, Pucun [1 ]
机构：
[1] Inner Mongolia Univ Technol, Coll Mat Sci & Engn, Hohhot 010051, Peoples R China
来源：
MATERIALS LETTERS | 2019年 / 243卷
基金：
中国国家自然科学基金;
关键词：
Mg-Al-Ca-RE alloys; Heterogeneous nucleation; Intermetallic alloys and compounds; Microstructure; MECHANICAL-PROPERTIES; BINARY INTERMETALLICS; TENSILE PROPERTIES; ELASTIC PROPERTIES; MAGNESIUM ALLOYS; MICROSTRUCTURE; 1ST-PRINCIPLES; STABILITY; CALCIUM;
D O I：
10.1016/j.matlet.2019.02.008
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The distribution and structure of second phases in an Mg-12Al-6.5Ca-1Nd alloy prepared by spray deposition technique were studied using scanning electron microscopy (SEM) and high-resolution transmission electron microscopy (HRTEM) combination of energy dispersion spectrum (EDS) mapping. Results show that several Al2Ca particles nucleated on the Al2Nd phase, revealing the initial liquid appearance of Al2Nd which finally led to the formation of heterogeneous nucleation sites. Low interfacial energy between the phases caused by closed lattice parameters is responsible for the heterogeneous nucleation. The crystallization sequence can be explained satisfactorily by the phase stability obtained from first-principles calculations. (C) 2019 Elsevier B.V. All rights reserved.
引用
收藏
页码：140 / 143
页数：4
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