期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 454, 期 1-2, 页码 142-146出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2006.12.074
关键词
modification; magnesium silicide; composites; microstructure; cubic crystals
The effect of Sr content on microstructure of Mg2Si/Al composite was investigated by XRD, SEM and extracted technology. The results showed that, with the increase of Sr content, primary Mg2Si morphology changes from dendritic to polygonal and then to quadrangle with a size of similar to 40 mu m. The extracted results indicated that, the unmodified Mg2Si is an assembly of octahedral with a common orientation. However, after 0.1-0.15 wt.% Sr addition, the particle morphology is cubic. Furthermore, there exist some twin crystals and fine crystals. The formation mechanism of cubic Mg2Si particle was discussed. (c) 2006 Elsevier B.V. All rights reserved.
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