In order to explore the methods to prepare high-strength quasicrystal-reinforced mag- nesium alloys,the flakes of rapidly solidified Mg-6.4Zn-1.1 Y magnesium alloy with a thickness of 50-60μm were obtained by a melt spinning single-roller device,and the flakes were then processed into rods by reciprocating extrusion and direct extrusion. The microstructure of the alloy was analyzed by optical microscope and SEM,and the constituent phases were identified by XRD.Phase transformation and its onset temperature were determined by differential thermal analyzer(DTA).The analysis result shows that rapid solidification for Mg-6.4Zn-1.1Y alloy can inhibit the eutec- tic reactions,broaden the solid solubility of Zn inα-Mg solute solution,and impede the formation of Mg_3 Y_2Zn_3 and MgZn_2 compounds,and thus help the icosahedral Mg_3 YZn_6 quasicrystal formed directly from the melt.The microstructure of the flakes consists of theα-Mg solid solution and icosahedral Mg_3 YZn_6 quasicrystal.Dense rods can be made from the flakes by two-pass reciprocating extrusion and direct extrusion. The interfaces between flakes in the rods can be welded and jointed perfectly.During the reciprocating extrusion and direct extrusion process,more Mg_3 YZn_6 compounds are precipitated and distributed uniformly,whereas the rods possess fine microstruc- turcs inherited from rapidly solidified flakes.The rods contain only two phases:α- magnesium solid solution as matrix and fine icosahedral Mg_3 YZn_6 quasicrystal which disperses uniformly in the matrix. In order to explore the methods to prepare high-strength quasicrystal-reinforced mag nesium alloys, the flakes of rapidly solidified Mg-6.4Zn-1.1Y magnesium alloy with a thickness of 50-60 μm were obtained by a melt spinning single-roller device , and the flakes were then processed into rods by reciprocating extrusion and direct extrusion. The microstructure of the alloy was analyzed by optical microscope and SEM, and the constituent phases were identified by XRD. Phase transformation and its onset temperature were determined by differential thermal analyzer (DTA). The analysis result shows that rapid solidification for Mg-6.4Zn-1.1Y alloy can inhibit the eutec- tic reactions, broaden the solid solubility of Zn inα-Mg solute solution, and impede the formation of Mg_3 Y_2Zn_3 and MgZn_2 compounds , and thus help the icosahedral Mg_3 YZn_6 quasicrystal formed directly from the melt. The microstructure of the flakes consists of the α-Mg solid solution and icosahedral Mg_3 YZn_6 quasicrystal. Dense The interfaces between flakes in the rods can be welded and joined perfectly. Drawing the reciprocating extrusion and direct extrusion process, more Mg_3 YZn_6 compounds are precipitated and distributed uniformly, while the rods possess fine microstruc- turcs inherited from rapidly solidified flakes. The rods contain only two phases: α- magnesium solid solution as matrix and fine icosahedral Mg_3 YZn_6 quasicrystal which disperses uniformly in the matrix.