图2为铸态合金的显微组织的SEM形貌，表2给出了0Zn与1.5Zn合金

FIG 2 is a SEM micrograph of the microstructure of the cast alloy, Table 2 shows the 0Zn 1.5Zn alloy with typical results of spectrum analysis. As can be seen from the figure, the cast alloy except α-Mg-based in vitro (labeled A), there are mainly three typical organization, respectively labeled B, C and D, where B is a eutectic structure, C is massive, D matrix phase is acicular. Figure 3 is a X-ray diffraction of the cast alloy. There are a 0Zn alloy XRD pattern of the diffraction peak with the α-Mg matrix and Mg5 (GdYZn), binding energy results of scanning electron microscope, the two diffraction peaks respectively scanning the topography of A and B correspond, i.e., matrix phase and a eutectic phase. There are 0.7Zn the XRD pattern of α-Mg alloy matrix, Mg5 (GdYZn) phase and Mg12Zn) YGd) phase, and Mg5 (GdYZn) diffraction peak 0Zn significantly reduced as compared to the alloy, the Zn content increases with , Mg5 (GdYZn) presented a diffraction peak intensity is further reduced, Mg12Zn (YGd) diffraction peak intensity was significantly increased phase, which corresponds with the SEM D. 3.3Zn the XRD pattern mainly α-Mg alloy matrix and Mg12Zn (YGd) phase, Mg5 (GdYZn) diffraction peaks to disappear, which is consistent with the results of the scan morphology.

Figure 2 is the SEM morphology of the microstructure of the cast alloy, and Table 2 gives the typical energy spectrometry analysis results of the 0Zn and 1.5Zn alloys. As can be seen from the figure, in addition to the alpha-Mg base body (marked As A), there are three typical tissues, marked as B, C and D respectively, of which B is cocrystalline tissue, C is a block phase, and D is a needle-like phase in the substrate. Figure 3 is the result of X-ray diffraction of cast alloys. The 0Zn alloy XRD map mainly has the diffraction peak of the alpha-Mg substrate and Mg5 (GdYZn) phase, combined with the energy spectrum result of the scanning electron mirror, the two diffraction peaks correspond to A and B in the scanning profile, i.e. the base phase and the cocrystalline. The 0.7Zn alloy XRD map is mainly composed of alpha-Mg substrate, Mg5 (GdYZn) phase and Mg12Zn YGd phase, while Mg5 (GdYZn) diffraction peak is significantly reduced compared to 0Zn alloy, and mg5 (GdYZn) is significantly reduced with the increase of Zn content The diffraction peak strength of the Mg12Zn (YGd) phase is further reduced, which corresponds to the D in the scanning mirror. The XRD map of the 3.3Zn alloy consists mainly of alpha-Mg substrate and Mg12Zn (YGd), and the diffraction peak of the Mg5 (GdYZn) phase disappears, which is basically consistent with the scanning profile observation.

Figure 2 shows the SEM morphology of the as cast alloy microstructure, and table 2 shows the typical energy spectrum analysis results of 0zn and 1.5zn alloy. It can be seen from the figure that in addition to α - Mg base (marked as a), there are three typical structures in as cast alloy, namely, B, C and D, in which B is eutectic structure, C is block phase and D is needle phase in matrix. Figure 3 shows the X-ray diffraction results of as cast alloy. There are mainly diffraction peaks of α - Mg matrix and MG5 (gdyzn) phase in the XRD pattern of 0zn alloy. Combined with the energy spectrum results of SEM, these two peaks correspond to a and B in the scanning morphology, i.e. matrix phase and eutectic phase. The XRD patterns of 0.7zn alloy mainly consist of α - Mg matrix, MG5 (gdyzn) phase and mg12zn) YGd phase, while the diffraction peak of MG5 (gdyzn) is significantly reduced compared with 0zn alloy, while with the increase of Zn content, the diffraction peak intensity of MG5 (gdyzn) is further reduced, and the diffraction peak intensity of mg12zn (YGd) phase is significantly increased, which corresponds to the D phase in SEM. The XRD pattern of 3.3zn alloy mainly consists of α - Mg matrix and mg12zn (YGd) phase, and the diffraction peak of MG5 (gdyzn) phase disappears, which is basically consistent with the observation of scanning morphology.<br>