Modeling of Eutectic Formation in Al-Si Alloy Using A Phase-Field Method

Structure of molten Al and eutectic Al–Si alloy studied by neutron diffraction

Au±Si eutectic alloy formation by Si implantation in polycrystalline Au

Di€erent doses of high-energy Si (0.2±4.5 MeV) were implanted in polycrystalline Au foils (35 lm thick) to form a low melting point Au±Si alloy which can be used for gold soldering. A Au±Si eutectic structure has been observed in the implanted Au foils after annealing at 400°C for 1 h. The Au±Si liquid phase was di€used in the polycrystalline Au foil along the grain boundaries which were ̄atten...

Influence of Modifying Mixtures on Si Crystal Formation in Al-7%Si Alloy

Using scanning and transmission electron microscopy, we studied silicon particles formed during the solidification of Al-7%Si alloy when different modifying mixtures were introduced into the melt: (1) a mixture of ultrafine powders Na3AlF6 + K2ZrF6 + TiO2 + ZrO2; (2) K2ZrF6; and (3) the flux Arsal. By differential scanning calorimetry, it was established that modifying mixtures significantly in...

Crystalline surface phases of the liquid Au-Si eutectic alloy

Oleg G. Shpyrko,1,2,* Reinhard Streitel,1 Venkatachalapathy S. K. Balagurusamy,1 Alexei Yu. Grigoriev,1 Moshe Deutsch,3 Benjamin M. Ocko,4 Mati Meron,5 Binhua Lin,5 and Peter S. Pershan1 1Department of Physics and School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, USA 2Center for Nanoscale Materials, Argonne National Laboratory, Argonne, Illinois 604...

“ Microstructural and mechanical properties of eutectic Al – Si alloy with grain refined and modified using gravity - die and sand casting ”

This paper attempts to investigate the influence of the microstructure and mechanical property changes on sand casting and permanent die casting alloys by grain refinement, modification combined action of both (Al– 3Ti–1B + Al–10Sr) and without grain refinement and modification effect. The microstructures of the castings are studied by optical microscopes. The microstructure and mechanical prop...