Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第13卷    第6期    总第57期    2003年12月

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文章编号:1004-0609(2003)06-1451-05
Ni3Al基合金IC6及MCrAlY包覆涂层的抗腐蚀性能
李树索, 韩雅芳1,2, 肖程波, 宋尽霞

(1. 北京航空航天大学 材料科学与工程学院, 北京 100083; 
2. 北京航空材料研究院, 北京 100095
)

摘 要: 采用离子电弧镀的方法在Ni↓3Al基合金IC6上涂覆了NiCrAlY, NiCoCrAlY及NiCoCrAlYHf 3种MCrAlX涂层, 测试了IC6合金及其涂层900℃时的抗热腐蚀性能。利用电子探针、 SEM、 X射线等手段观察了腐蚀试样的微观结构, 分析了腐蚀产物的组成, 探讨了IC6合金及其涂层的腐蚀机理。 结果表明: 3种涂层均使IC6合金的抗热腐蚀性能有明显改善, NiCoCrAlY Hf涂层的效果最为显著, 表面氧化膜的酸性溶解是造成热腐蚀的主要原因。

 

关键字: IC6合金; MCrAlY涂层; 热腐蚀

Corrosion resistances of 
Ni3Al based alloy IC6 and MCrAlY overlay coatings
LI Shu-suo1, HAN Ya-fang1, 2, XIAO Cheng-bo2, SONG Jin-xia2

1. School of Materials Science and Engineering,
Beijing University of Aeronautics and Astronautics, 
Beijing 100083, China; 
2. Beijing Institute of Aeronautical Materials, 
Beijing 100095, China

Abstract:NiCrAlY, NiCoCrAlY and NiCoCrAlYHf overlay coatings were deposited on Ni3Al based alloy IC6 by arc PVD method, and the corrosion resistance of the coating and uncoated alloy IC6 at 900℃ were tested. The microstructures of the samples after hot corrosion for 100h were observed by EPMA, SEM and XRD, as well the corrosive was analyzed. The results show that all the three MCrAlY coatings make the corrosion resistance of alloy IC6 improved, and the effect of NiCoCrAlYHf coating is rather better. The main factor of hot corrosion is that the scales in the surface are dissolved by acid melt salt.

 

Key words: alloy IC6; MCrAlY overlay coating; hot corrosion

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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