张帅杰,黄诗琦,孙潇,张磊

• 1:南昌航空大学航空制造工程学院

摘要(Abstract)：

采用重力铸造方法制备了4种Mg_(100-3x)Y_(2x)Cu_x(x=0.5,1,1.5和2 at%)合金,借助扫描电镜观察了合金的铸态组织,采用浸泡试验和电化学试验研究了合金的耐蚀性。结果表明:随着Y、Cu含量的增加,合金中LPSO相的体积分数显著增加,其形貌也由不连续网状和孤岛状共存转变为连续网状分布。LPSO相对合金的腐蚀具有双重作用。Mg_(98.5)Y_1Cu_(0.5)合金的耐腐蚀性能最佳,Mg_(97)Y_2Cu_1合金的耐蚀性能最差,4种合金按照耐腐蚀性能由高到低排序为:Mg_(98.5)Y_1Cu_(0.5)>Mg_(95.5)Y_3Cu_(1.5)>Mg_(94)Y_4Cu_2>Mg_(97)Y_2Cu_1。

关键词(KeyWords)： Mg-Y-Cu合金;长周期堆垛有序相;组织;腐蚀行为

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51401102);; 南昌航空大学研究生创新专项(YC2020019);; 江西省重点研发计划(20192BBE50001)

作者(Author): 张帅杰,黄诗琦,孙潇,张磊

DOI: 10.13289/j.issn.1009-6264.2021-0170

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