TRANSFORMATION OF CRYSTAL MORPHOLOGY OF EUTECTIC COMPOSITE-IN-SITU
共晶自生复合材料的晶形转变

It is clarified by experimental examination and theoretical analysis that the trans- formation of crystal morphology of the eutectic Al-Cu alloy composite-in-situ seems to be judged by not only the constitutional supercooling proposed in previous literatures but also the supercooling due to the effect of curved surfaces at the solidifying front. The greater entropy of fusion and the tendency to faceted face are important features of the non-metallic phase, which may contribute to the leading role of the phase during solidification. It might be the change of leading phase that changes the morphology of crystals.