Valence electron structure analysis of refining mechanism of Sc and Ti additions on aluminum

The mechanism of the difference of refining effect between Sc and Ti adding to aluminum can not be explained substantially with traditional theory. Valence electron structures of Al-Ti and Al-Sc alloys have been studied by using the empirical electron theory of solids and molecules （EET）. The covale...

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Bibliographic Details
Published in:Chinese science bulletin 2009-03, Vol.54 (5), p.836-841
Main Authors: Li, PieJie, Ye, YiCong, He, LiangJu
Format: Article
Language:English
Subjects:
Al3Sc
Al3Ti
Articles/Metal Material
Chemistry/Food Science
Earth Sciences
Engineering
Humanities and Social Sciences
Life Sciences
multidisciplinary
Physics
Science
Science (multidisciplinary)
价电子结构
细化机制
经验电子理论
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Summary:The mechanism of the difference of refining effect between Sc and Ti adding to aluminum can not be explained substantially with traditional theory. Valence electron structures of Al-Ti and Al-Sc alloys have been studied by using the empirical electron theory of solids and molecules （EET）. The covalent bond electron numbers and interfacial electron density differences are calculated. The conclusion is that, in the two alloys, different covalent bond electron numbers of nucleation particles, and different electron densities on the interface between the second phase particles and the matrix, fundamentally lead to the difference of refining effect between Sc and Ti adding to aluminum.
ISSN:1001-6538
2095-9273
1861-9541
2095-9281
DOI:10.1007/s11434-008-0514-z