The structure and high temperature corrosion performance of medium-thickness aluminide coatings on nickel-based superalloy GTD-111
The structure and high temperature corrosion performance of medium-thickness aluminide coatings on nickel-based superalloy GTD-111
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DOI：
10.1016/j.corsci.2010.06.026
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发表时间：
2010-11
影响因子：
8.3
通讯作者：
A. Firouzi;K. Shirvani
中科院分区：
文献类型：
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作者：
A. Firouzi;K. Shirvani
用浆料法在GTD-111高温合金上制备了中厚（40-60μm）的简单铝化物涂层和硅改性铝化物涂层。通过在780°C下暴露于Na 2SO 4 - 40%wt NaVO 3 -10%wt NaCl的熔融膜中和在1100°C下在空气中循环氧化1h，研究了涂层和未涂层高温合金的热腐蚀和循环氧化性能。铝化物结构中硅的存在使抗氧化性增加了1.7倍。此外，含硅涂层表面形成的含SiO2氧化皮在热腐蚀试验过程中保持稳定。
Simple and Si-modified aluminide coatings having medium-thickness (40–60μm) have been applied on the superalloy GTD-111 by a slurry technique. Hot corrosion and cyclic oxidation performance of the uncoated and the coated superalloy were investigated by exposing samples to a molten film of Na2SO4-40 %wt NaVO3-10%wt NaCl at 780°C and 1h cyclic oxidation at 1100°C in air, respectively. The presence of silicon in the aluminide structure increased the oxidation resistance by a factor of 1.7 times. In addition, a SiO2-containing scale, which formed on the Si-containing coating surface, was stable during of the hot corrosion testing.