Strontium modification and formation of cubic primary Mg2Si crystals in Mg2Si/Al composite

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 40mum. The extracted re...

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Veröffentlicht in:	Journal of alloys and compounds 2008-04, Vol.454 (1-2), p.142-146
Hauptverfasser:	QIN, Q. D, ZHAO, Y. G, LIU, C, CONG, P. J, ZHOU, W
Format:	Artikel
Sprache:	eng
Schlagworte:	Applied sciences Exact sciences and technology Metals. Metallurgy Powder metallurgy. Composite materials Production techniques
Online-Zugang:	Volltext
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Zusammenfassung:	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 40mum. The extracted results indicated that, the unmodified Mg2Si is an assembly of octahedral with a common orientation. However, after 0.1-0.15wt.% 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.
ISSN:	0925-8388 1873-4669
DOI:	10.1016/j.jallcom.2006.12.074