| DSM11镍基高温合金表面三种涂层高温性能 |
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| 引用本文： | 李艳明,迟庆新,刘欢,佟文伟,赵世炜,高志坤.DSM11镍基高温合金表面三种涂层高温性能[J].航空动力学报,2021,36(7):1499-1508. |
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| 作者姓名： | 李艳明 迟庆新 刘欢 佟文伟 赵世炜 高志坤 |
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| 作者单位： | 中国航空发动机集团有限公司 沈阳发动机研究所, 沈阳 110015 |
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| 摘 要： | DSM11镍基高温合金表面制备Al-Si、Al和Co-Al三种涂层，研究三种涂层在900℃下的涂盐（质量分数为5% NaCl+95% Na2SO4）热腐蚀性能和800℃下的疲劳性能。实验结果表明:在900℃热腐蚀200h后，Al-Si涂层和Co-Al涂层表面腐蚀区均形成了以Al2O3为主的连续且致密的氧化层，抑制热腐蚀反应的进行，具有一定的抗热腐蚀性能；Al涂层表面腐蚀区形成了混合型氧化层，热腐蚀反应会持续进行，抗热腐蚀性能较差。在800℃的疲劳实验后，Al-Si涂层表面生成大量的微裂纹，涂层容易发生开裂，进而引起合金试样快速断裂；Co-Al涂层和Al涂层的合金试样表现较好的抗高温疲劳性能。在高温合金的防护涂层使用中，要充分考虑到涂层的服役环境，对相关性能进行综合评价，选出最适合的防护涂层。
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| 关 键 词： | Al-Si涂层 Al涂层 Co-Al涂层 热腐蚀 疲劳 |
| 收稿时间： | 2020/10/24 0:00:00 |
High temperature behaviors of three coatings on nickel-based superalloy DSM11 |
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| LI Yanming,CHI Qingxin,LIU Huan,TONG Wenwei,ZHAO Shiwei,GAO Zhikun.High temperature behaviors of three coatings on nickel-based superalloy DSM11[J].Journal of Aerospace Power,2021,36(7):1499-1508. |
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| Authors: | LI Yanming CHI Qingxin LIU Huan TONG Wenwei ZHAO Shiwei GAO Zhikun |
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| Affiliation: | Shenyang Engine Research Institute, Aero Engine Corporation of China, Shenyang 110015, China |
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| Abstract: | Three coatings (Al-Si coating, Al coating and Co-Al coating) were prepared on the surface of nickel-based superalloy DSM11. The hot corrosion behaviors in the salt of 5%NaCl+95%Na2SO4 (mass fraction) at 900℃ and the fatigue property at 800℃ were investigated. The coatings after corrosion for 200h at 900℃, Al-Si and Co-Al coatings had excellent hot corrosion resistance to further hot corrosion because of a continuous and dense Al2O3 protective layer on the surface. Al coating had poorer hot corrosion resistance for a mixed oxidation layer in the corrosion area, which could not prevent hot corrosion. After fatigue test of the coatings at 800℃, the alloy samples were prone to rapid fracture that a lot of micro cracks appeared on the surface of Al coating. Co-Al and Al coatings showed better high-temperature fatigue performance. In order to select the most suitable protective coating of nickel-based superalloy, service environment and integrated performance should be fully considered. |
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| Keywords: | Al-Si coating Al coating Co-Al coating hot corrosion fatigue |
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