| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5357723 | Applied Surface Science | 2015 | 7 Pages |
Abstract
A Si modified aluminide (Al-Si) coating was prepared on a Ni3Al based single crystal superalloy with high Mo content by high-activity pack cementation. Cyclic oxidation test at 1150 °C was carried out and the microstructure evolution of the coating was investigated. The results show that the oxidation resistance of the substrate was greatly increased by applying an Al-Si coating. During oxidation, outward diffusion of Mo was effectively blocked due to its high affinity with Si. Besides, a layered structure was formed as a result of the elements inter-diffusion. An obvious degradation of the Al-Si coating was observed after 100 h oxidation. Possible mechanisms related to the oxidation and elements inter-diffusion behaviours were also discussed.
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Authors
Xiaolu Tu, Hui Peng, Lei Zheng, Wenyan Qi, Jian He, Hongbo Guo, Shengkai Gong,