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采用水冷铜模法和水淬法制备得到Mg65+x(Cu0.66Y0.34)30-xZn5(x=5,10,15)非晶及其复合材料。并通过XRD、SEM对材料结构进行表征,研究Mg含量和冷却速度对样品微观结构的影响。结果表明:由水冷铜模法得到的x=5样品为单一非晶,x=10和15样品是由非晶相与Mg固溶体相组成的非晶复合材料。而利用冷速较低的水淬法得到的样品为非晶复合材料,其主要由Mg,Mg2Cu,MgZnY和非晶相组成。通过研究合金在NaCl中性溶液中的腐蚀行为,发现随着Mg含量的增加,样品的耐腐蚀性能有所下降。并且对于同成分的合金,由冷速较快的水冷铜模法得到的样品耐蚀性相对较好。
Mg65 + x (Cu0.66Y0.34) 30-xZn5 (x = 5,10,15) amorphous and their composites were prepared by water-cooled copper mold method and water quenching method. The structure of the material was characterized by XRD and SEM. The influence of Mg content and cooling rate on the microstructure of the sample was investigated. The results show that the x = 5 samples obtained by the water-cooled copper mold are single amorphous and x = 10 and 15 samples are amorphous composites composed of amorphous phase and Mg solid solution phase. The samples obtained by the water quenching method with lower cooling rate are amorphous composites, which mainly consist of Mg, Mg2Cu, MgZnY and amorphous phases. By studying the corrosion behavior of alloy in NaCl neutral solution, it is found that the corrosion resistance of the sample decreases with the increase of Mg content. And for the same composition of the alloy, by the faster cooling rate of water-cooled copper mold samples obtained corrosion resistance is relatively good.