作　　者： ; ; ; ; (孙明体）;

机构地区： 广州有色金属研究院

出　　处： 《轻合金加工技术》 2016年第5期55-62,共8页

摘　　要： 利用固相合成法将ZK60镁合金碎屑与Si C陶瓷颗粒通过等温挤压制备Si Cp/ZK60镁基复合材料,进行微观组织观察和力学性能测试。结果表明,Si C颗粒能显著提高Si Cp/ZK60复合材料的室温抗拉强度和屈服强度,但对塑性不利。Si C颗粒在Si Cp/ZK60复合材料中呈流线形沿挤压方向富集分布;Si C颗粒能使Si Cp/ZK60复合材料晶粒尺寸发生不同程度的细化。利用腐蚀失重和电化学测试方法进行试验表明,挤压变形后的Si Cp/ZK60复合材料的主要腐蚀方式为局部腐蚀,有较深的点蚀坑且分布无方向性;腐蚀速率随Si C颗粒体积分数的增加而增大。 With solid phase synthesis, SiCp/ZK60 Mg composites were prepared by isothermal extrusion of ZK60 Mg-alloy chips and SiC particles, observed on the mierostructure and investigated on mechanical properties. The results indicate that the room temperature tensile strength and yield strength of SiCp/ZK60 increase with SiC particles increasing, while the SiC particles are disadvantageous to the ductility. SiC particles are rich and aligned in the extrusion direction and promote grain refinement. The results of the mass loss method and electrochemical measurements indicate that the main corrosion pattern of SiCp/ZK60 after extrusion is local corrosion with the deep pitting corrosion pit and non-directional distribution; the corrosion rate of the SiCp/ZK60 increases with the increasing volume fraction of micron-sized SiC.

关 键 词： 复合材料 力学性能 微观组织 腐蚀性能

领　　域： [金属学及工艺] [一般工业技术] [金属学及工艺] [金属学及工艺]