DSM11镍基高温合金表面三种涂层高温性能

李艳明; 迟庆新; 刘欢; 佟文伟; 赵世炜; 高志坤

doi:10.13224/j.cnki.jasp.20200448

DSM11镍基高温合金表面三种涂层高温性能

doi: 10.13224/j.cnki.jasp.20200448

中国航空发动机集团有限公司沈阳发动机研究所, 沈阳 110015

详细信息

作者简介:
李艳明(1990-),男,工程师,硕士,主要从事航空发动机及燃气轮机材料应用研究。

中图分类号: V232.4;TG136.1
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- 文章访问数: 610
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- 被引次数: 0
出版历程
- 收稿日期: 2020-10-24
- 刊出日期: 2021-07-28

High temperature behaviors of three coatings on nickel-based superalloy DSM11

Shenyang Engine Research Institute, Aero Engine Corporation of China, Shenyang 110015, China

摘要

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。
- Al-Si涂层 /
- Al涂层 /
- Co-Al涂层 /
- 热腐蚀 /
- 疲劳
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.
- Al-Si coating /
- Al coating /
- Co-Al coating /
- hot corrosion /
- fatigue

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