Silicon morphology in sodium modified AlSi eutectic alloys

Optical and scanning electron microscopy of laboratory samples of sodium modified AlSi alloy of commerical purity has revealed that the modified eutectic structure grows as spherulites. The spherulites consist of aligned branched silicon fibres radiating from the spherulitic center. All the iron im...

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Bibliographic Details
Published in:Materials research bulletin 1970-06, Vol.5 (6), p.431-436
Main Authors: Powell, G.L.F., Colligan, G.A.
Format: Article
Language:English
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Summary:Optical and scanning electron microscopy of laboratory samples of sodium modified AlSi alloy of commerical purity has revealed that the modified eutectic structure grows as spherulites. The spherulites consist of aligned branched silicon fibres radiating from the spherulitic center. All the iron impurity was concentrated in the spherulite boundaries as AlFeSi compound. Nearly all the AlFeSi was in the form of β needles.
ISSN:0025-5408
1873-4227
DOI:10.1016/0025-5408(70)90082-6