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In this study, a new Al–P–Ti–TiC–Y modifier has been successfully designed to modify primary silicon in hypereutectic Al–20wt.%Si and Al–29wt.%Si alloys. The results show that the morphologies of primary silicon crystals are drastically changed from irregular morphologies, such as starlike (fivefold) and coarse platelet to regular morphologies. Statistical analysis shows that primary silicon sizes...
A ternary Al-8Si-5.1Cu (in wt.%) alloy was rapidly quenched from the melt at cooling rates between 10 6 and 10 7 K/s using the melt-spinning technique. The resulting ribbons were characterized using optical microscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD) and microhardness techniques. On the basis of the Al peak shifts...
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