中文摘要：

改进镁合金的力量，坚韧，热抵抗和 deformability ，微观结构和 Mg-Zn-Nd 球形的伪水晶加强的 ZK60 合金的机械性质分阶段执行(我阶段)粒子是除了 -Mg,MgZn 阶段的 investigated.Mg40Zn55Nd5 (i阶段)粒子， MgZn2 阶段能在由包含试验性的结果显示出的 Mg-Zn-Nd 主人 alloy.The 的伪水晶的增加扔状况的正常下面在 基于ZK60 的 composites 被获得介绍

英文摘要：

To improve the strength, toughness, heat-resistance and deformability of magnesium alloy, the microstructure and mechanical properties of ZK60 alloy strengthened by Mg-Zn-Nd spherical quasi-crystal phase （I-phase） particles were investigated. Mg40Zn55Nd5 （I-phase） particles in addition to α-Mg, MgZn phase and MgZn2 phases can be obtained in ZK60-based composites under normal casting condition by the addition of quasi-crystal containing Mg-Zn-Nd master alloy. The experimental results show that the introduction of Mg-Zn-Nd spherical quasicrystal phase into Z.K60 alloy makes a great contribution to the refinement of the matrix microstructures and the improvement of mechanical properties. While adding Mg-Zn-Nd spherical quasi-crystal master alloy of 4.0wt.%, the ultimate tensile strength and yield strength of ZK60-based composite at ambient temperature reach their peak values of 256.7 MPa and 150.4 MPa, which were about 17.8% and 24.1% higher respectively than those of the ZK60 alloy. The improved mechanical properties are mainly attributed to the pinning effect of the quasi-crystal particles （I-phase） at the grain boundaries. This research results provide a new way for strengthening and toughening of magnesium alloys as well as a new application of Mg-based spherical quasi-crystals.