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材料工程  2018, Vol. 46 Issue (1): 44-52    DOI: 10.11868/j.issn.1001-4381.2016.000617
  研究论文 本期目录 | 过刊浏览 | 高级检索 |
微弧氧化及包埋渗铝法制备的复合涂层高温抗蚀性能
黄祖江1, 蒋智秋1, 董婉冰1, 童庆1, 李伟洲1,2
1. 广西大学 材料科学与工程学院, 南宁 530004;
2. 广西生态型铝产业协同创新中心, 南宁 530004
High-temperature Corrosion Resistance of Composite Coating Prepared by Micro-arc Oxidation Combined with Pack Cementation Aluminizing
HUANG Zu-jiang1, JIANG Zhi-qiu1, DONG Wan-bing1, TONG Qing1, LI Wei-zhou1,2
1. School of Materials Science and Engineering, Guangxi University, Nanning 530004, China;
2. Center of Ecological Collaborative Innovation for Aluminum Industry in Guangxi, Nanning 530004, China
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摘要 采用包埋渗铝技术在C103铌合金基体上制备Al/C103,通过微弧氧化(MAO)处理获得Al2O3陶瓷膜外层。利用X射线衍射仪(XRD)和配有能谱仪(EDS)的扫描电镜(SEM),分析复合涂层高温腐蚀前后的成分和组织结构,并研究其高温氧化和热腐蚀行为与机理。结果表明:包埋渗铝处理的Al/C103经1000℃氧化10h后增重为6.98mg/cm2,微弧氧化结合包埋渗铝制备的MAO/Al/C103增重为2.89mg/cm2;氧化20h后,MAO/Al/C103增重为57.52mg/cm2,高于Al/C103的28.08mg/cm2。在900℃熔融混合盐(75% Na2SO4和25% NaCl,质量分数)中腐蚀50h后,Al/C103和MAO/Al/C103的增重分别为70.54,55.71mg/cm2,表面生成了Al2O3和钙钛矿结构NaNbO3相;部分NaNbO3堵塞MAO微孔,阻碍熔盐向内扩散,MAO/Al/C103试样表现出较优的抗热腐蚀性。
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黄祖江
蒋智秋
董婉冰
童庆
李伟洲
关键词 微弧氧化包埋渗铝高温氧化热腐蚀铌合金    
Abstract:Al2O3 ceramic film was obtained by micro-arc oxidation (MAO) process on Al/C103 specimen, which was prepared by pack cementation aluminizing technology on C103 niobium alloy. With the aid of XRD and SEM equipped with EDS, chemical compositions and microstructures of the composite coatings before and after high-temperature corrosion were analyzed. The behavior and mechanism of the composite coatings in high-temperature oxidation and hot corrosion were also investigated. The results indicate that oxidation mass gain at 1000℃ for 10h of the Al/C103 specimen is 6.98mg/cm2, and it is 2.89mg/cm2 of the MAO/Al/C103 specimen. However, the mass gain of MAO/Al/C103 specimen (57.52mg/cm2) is higher than that of Al/C103 specimen (28.08mg/cm2) after oxidation 20h. After hot corrosion in 75%Na2SO4 and 25%NaCl at 900℃ for 50h, the mass gain of Al/C103 and MAO/Al/C103 specimens are 70.54mg/cm2 and 55.71mg/cm2 respectively, Al2O3 and perovskite NaNbO3 phases are formed on the surface; the diffusion of molten salt is suppressed, due to part of NaNbO3 accumulated in the MAO micropores. Therefore, MAO/Al/C103 specimen exhibits better hot corrosion resistance.
Key wordsmicro-arc oxidation    pack cementation aluminizing    high-temperature oxidation    hot corrosion    niobium alloy
收稿日期: 2016-05-20      出版日期: 2018-01-18
中图分类号:  TG174.4  
通讯作者: 李伟洲(1975-),男,博士,研究员,主要从事航空及工业用金属材料的表面处理及防护,联系地址:广西壮族自治区南宁市广西大学材料科学与工程学院(530004),E-mail:liwz2008@hotmail.com     E-mail: liwz2008@hotmail.com
引用本文:   
黄祖江, 蒋智秋, 董婉冰, 童庆, 李伟洲. 微弧氧化及包埋渗铝法制备的复合涂层高温抗蚀性能[J]. 材料工程, 2018, 46(1): 44-52.
HUANG Zu-jiang, JIANG Zhi-qiu, DONG Wan-bing, TONG Qing, LI Wei-zhou. High-temperature Corrosion Resistance of Composite Coating Prepared by Micro-arc Oxidation Combined with Pack Cementation Aluminizing. Journal of Materials Engineering, 2018, 46(1): 44-52.
链接本文:  
http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2016.000617      或      http://jme.biam.ac.cn/CN/Y2018/V46/I1/44
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