陈籽佚,李全安,陈晓亚,朱宏喜

• 1:河南科技大学材料科学与工程学院
• 2:有色金属新材料与先进加工技术省部共建协同创新中心

摘要(Abstract)：

采用静态质量损失法和电化学测试实验等研究了Al元素添加对时效态Mg-12Gd-3Y-1Sm合金耐蚀性的影响。采用光学显微镜、扫描电镜和X射线衍射仪对合金的微观组织及腐蚀产物的物相和形貌进行了观察分析。结果表明:Mg-12Gd-3Y-1Sm时效态合金组织由α-Mg基体和Mg_5Gd、 Mg_(24)Y_5和Mg_(41)Sm_5相组成,添加Al元素后,合金中出现了Al_2RE相。随着Al元素添加量的增加,时效态合金的晶粒先减小后增大,当Al添加量为0.8%时,合金晶粒最细小,第二相最均匀。Al的添加能显著提高合金的耐蚀性,但当Al添加量超过0.8%时合金耐蚀性又开始略有降低,添加0.8%Al的合金具有最佳的耐蚀性,这与电化学测试分析结果相一致,合金腐蚀产物主要为Mg(OH)_2和少量的Al_2RE。

关键词(KeyWords)： Mg-Gd-Y-Sm合金;Al;显微组织;耐蚀性

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51571084)

作者(Author): 陈籽佚,李全安,陈晓亚,朱宏喜

DOI: 10.13289/j.issn.1009-6264.2020-0435

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