离心压力对AZ91镁合金组织及腐蚀行为的影响  

Effect of Centrifugal Pressure on Microstructure and Corrosion Resistance of Magnesium Alloys

作　　者：赵磊[1] 马幼平[1] 杨蕾[1] 张平安[1] 邹龙龙 邵煜波 张宝林[1] 

机构地区：[1]西安建筑科技大学冶金工程学院,西安710005

出　　处：《材料导报（纳米与新材料专辑）》2016年第1期487-489,共3页

基　　金：陕西省工业攻关项目(2014K08-1);陕西省教育厅重点实验室科研计划项目(14JS054)

摘　　要：探讨了不同离心压力条件下得到的AZ91镁合金的凝固组织及在3.5%NaCl腐蚀介质中的耐腐蚀性能,利用光学显微镜以及XRD研究了凝固组织的变化,通过析氢集气法对其腐蚀性能进行测定。研究结果表明:通过离心加压可以改变AZ91中第二相的分布形态,随着离心压力的增大,AZ91镁合金中第二相由断续的蠕虫状变为连续网状,在一定程度上对基体形成保护,提高了材料的耐腐蚀性能。The AZ91 magnesium alloy solidification structure under different conditions and the corrosion resistance in 3.5% NaCl corrosive media under centrifugal pressure were discussed,the changes in the solidification structure was studied by the optical microscope and XRD,hydrogen gas gathering method by analyzing their corrosion.The results showed that：AZ91can be changed by centrifugal pressure in the second phase of distribution patterns,with increasing centrifugal pressure.AZ91 magnesium alloy in the second phase by the intermittent wormlike becomes continuous network.To some extent,to the substrate to form a protective,improved corrosion resistance of the material.

关 键 词：压力 AZ91镁合金 组织 耐腐蚀性能 

分 类 号：TG146.2[一般工业技术—材料科学与工程]