The Eutectic Reaction in Certain Binary Metallic Systems |
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addition alloys aluminum-copper aluminum-zinc amount appeared areas assumed axis behavior bismuth boat branching cells changes colony boundaries completely composition concentration considered constituent continuous cooling crystallization curved decanted interface decreasing definite dendrites diagram Direct illumination discussed displayed effect entire established etch eutectic eutectic reaction evidence examination exist experimental extensive furnace further grain boundary graphite greater grooves growing grown growth conditions growth direction growth rate heat increase indicated lamellae lamellar structure later liquid materials matrix mechanism melting metallographic metals morphology nature necessary noted nucleation Oblique observed obtained occur orientation parallel particles peaks percent permit phase placed plane polished position possible present primary produced properties reason references region result revealed rods sample shape shown in Figure shows side similar single-phase solid solidification solute specimen specks speed structure supercooling surface surface tension Table temperature gradient tin-zinc usually visible zinc