Effect of Y2O3 content in the pack on microstructure and hot corrosion resistance of Y–Co-modified aluminide coating
Effect of Y2O3 content in the pack on microstructure and hot corrosion resistance of Y–Co-modified aluminide coating
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DOI：
10.1016/j.corsci.2014.05.018
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发表时间：
2014-09
影响因子：
8.3
通讯作者：
Xiongsheng Zhao;Chungen Zhou
中科院分区：
文献类型：
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作者：
Xiongsheng Zhao;Chungen Zhou
采用粉末包埋法在镍基高温合金表面制备了钇钴改性铝化物涂层。研究了Y2 O3含量对涂层组织和抗热腐蚀性能的影响。结果表明，随着Y2 O3含量的增加，涂层中Co的含量增加。Y_2O_3添加量分别为1、2和3 wt.%时，涂层的增重在1173 K下热腐蚀100 h后的平均腐蚀速率分别为0.6、0.55和0.42 mg/cm 2。Y2 O3的加入促进了Co的扩散，从而提高了涂层的抗热腐蚀性能。
Y–Co-modified aluminide coatings on nickel base superalloys were prepared by pack cementation method. Effect of Y2O3content in the pack mixture on microstructure and hot corrosion resistance of the coatings was investigated. The results show that with the increase in Y2O3content, the content of Co in the coatings increases. The mass gain of the coatings with Y2O3addition of 1, 2 and 3 wt.% is 0.6, 0.55 and 0.42 mg/cm2after hot corrosion at 1173 K for 100 h, respectively. Y2O3addition accelerates the diffusion of Co and thus increases the hot corrosion resistance of the coating.