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2种不同体积分数的SiCp被选作为增强体,利用半固态结合超声处理法制备了Mg-Zn-Ca-Mn复合材料,然后在350℃用15:1的挤压比进行了热挤压。利用OM、SEM和TEM对材料的微观结构进行了检测。热挤压后的微观结构显示SiC颗粒的分布较为均匀且在1vol%SiCp/Mg-Zn-Ca-Mn和3vol%SiCp/Mg-Zn-Ca-Mn复合材料中晶粒被显著细化。SiCp的引入可以改善屈服强度和抗拉强度。屈服强度和抗拉强度是随着颗粒含量的增加而增加。
Two different volume fractions of SiCp were selected as reinforcements. The Mg-Zn-Ca-Mn composites were prepared by semi-solid combined sonication and then hot-pressed at 350 ℃ with a 15: 1 extrusion ratio. The microstructure of the material was examined by OM, SEM and TEM. The microstructures after hot extrusion showed that the distribution of SiC particles was more uniform and the grains were significantly refined in 1vol% SiCp / Mg-Zn-Ca-Mn and 3vol% SiCp / Mg-Zn-Ca-Mn composites. The introduction of SiCp can improve the yield strength and tensile strength. Yield strength and tensile strength increase with increasing particle content.