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Heterogeneous nucleation mechanism in Al-Fe-Si amorphous alloys

journal contribution
posted on 2001-05-31, 00:00 authored by P Schumacher, Pavel CizekPavel Cizek
Al 70 Fe 13 Si 17 alloys were melt-spun with commercial grain refiner additions containing TiB 2 and Al 3 Ti particles. X-ray diffraction. calorimetry and transmission electron microscopy revealed incomplete vitrification. The size and number density of Al crystals increased with decreasing quench rate. Full crystallisation led to formation of β-Al 9 FeSi 2 and Al. In as-quenched samples nucleation events on TiB 2 particles were surrounded by nanocrystalline α-Al particles embedded in amorphous phase. Boride particles were covered in a thin Ti-containing layer and surrounded by a featureless zone reminiscent of a peritectic reaction and they exhibited an orientation relationship to next neighbour Al particles.

History

Journal

Materials science and engineering: A

Volume

304-306

Pagination

215-219

Location

Amsterdam, The Netherlands

ISSN

0921-5093

Language

eng

Publication classification

C1.1 Refereed article in a scholarly journal

Copyright notice

2001, Elsevier Science

Issue

1-2

Publisher

Elsevier

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