Microstructure Evolution of Zn-9.5Al-3Mg-0.01Ce Alloy
The microstructure and phase composition of Zn-9.5Al-3Mg-0.01Ce alloy were investigated by XRD,SEM and EDS.The results reveal that Zn-9.5Al-3Mg-0.01Ce alloy is composed of primary Al dendrites,Al+ MgZn2 binary eutectic,Al+Zn+Mg2Zn11 ternary eutectic under cold furnace conditions.The primary Al dendrites are non-single phase,and an obvious step-like morphology is observed at the edges of primary Al dendrites.EDS linear scan results indicate that the Al content at the inner of the dendrites are much higher than that at the external,while Zn content is the contrary,which is attributed to the peritectic reaction during solidification.
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