Since the Sn in the alloys not only

Since the Sn in the alloys not only can forms the thermal stable Mg2Sn phase, but also the Mg2Sn can acts as the nucleating agent for MgZn2 to inspire the nucleation of MgZn2. The mechanical properties would be enhanced because these massive formed second phases are effective obstacle for the grain boundaries, and the dislocation tangles also be found around the granular particles, thus the dislocation loops would be left when dislocations moves around since both Mg2Sn and MgZn2 are not easily deformed. In this way Mg-Sn-Zn alloys would exhibit great applicability in industries because both Mg2Sn and MgZn2 are contributive to the mechanical properties. Meanwhile, as the Y added in, the effect of Y on grain refinement is significant, and fine MgSnY particles also can be found in the alloys which contains Y less than 0.5 wt%, but MgSnY would aggregate into clusters when Y addition exceed 0.5 wt%, the performance of alloys could be influenced a lot by these phases.