Structure of molten Al-Si alloys

TitleStructure of molten Al-Si alloys
Publication TypeJournal Article
Year of Publication2007
AuthorsDahlborg U, Besser M, Calvo-Dahlborg M, Cuello G, Dewhurst CD, Kramer MJ, Morris JR, Sordelet DJ
Journal TitleJournal of Non-Crystalline Solids
Date PublishedOct
Type of ArticleProceedings Paper
ISBN Number0022-3093
Accession NumberISI:000250235200009
KeywordsINTERACTING, liquid alloys and liquid metals, medium-range order, microstructure, MOLECULAR-DYNAMICS SIMULATION, neutron diffraction/scattering, particles, short-range order, small-angle scattering, structure, TRANSFORMATION

The temperature variation of the structure and microstructure of molten eutectic Al1-xSix alloys (x = 0.122 and 0.20) have been studied by neutron diffraction and small-angle neutron scattering (SANS), as well as measurements performed on pure liquid Al. All measurements have been performed at five temperatures in a heating-cooling loop. The SANS results unambiguously show that for the eutectic alloy (x = 0, 122) the microstructure changes with increasing temperature in a partly reversible way while for the hypereutectic (x = 0.20) alloy the change is almost completely irreversible. This change in microstructure also manifests itself in the shape of the static structure factor S(Q). (c) 2007 Elsevier B.V. All rights reserved.

Alternate JournalJ. Non-Cryst. Solids