Structure of molten Al–Si alloys |
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Affiliation: | 1. LSG2M, CNRS-UMR7584, Ecole des Mines, 54042 Nancy cedex, France;2. Ames Laboratory, Iowa State University, Ames IA 50014, USA;3. Institute Laue-Langevin, 6 rue Jules Horowitz, 38042 Grenoble, France;4. Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge, TN 37831-6115, USA |
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Abstract: | 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). |
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