| 李艳明1 ，李中生 2 ，刘欢1 ，卜嘉利 1 ，张开阔 1 ，韩振宇 1.镍基高温合金表面Co-Al涂层抗高温氧化性能研究[J].航空发动机,2023,49(1):169-174 |
| 镍基高温合金表面Co-Al涂层抗高温氧化性能研究 |
| Research on High Temperature Oxidation Resistance of Co-Al Coatings on Ni-based Superalloy |
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| DOI： |
| 中文关键词: 镍基高温合金 Co-Al涂层 高温氧化 Al 2 O 3 保护膜 航空发动机 |
| 英文关键词:Ni-based superalloy Co-Al coatings high temperature oxidation Al 2 O 3 protective film aeroengine |
| 基金项目:航空动力基础研究项目资助 |
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| 中文摘要: |
| 为了研究镍基高温合金表面Co-Al涂层抗高温氧化性，对该Co-Al涂层在800、900和1000 ℃下进行200 h高温氧化试
验，利用扫描电子显微镜（SEM）、能谱仪（EDS）和X射线衍射仪（XRD）等进行高温氧化行为分析。结果表明：合金氧化动力学曲线
均基本符合抛物线规律，氧化激活能为78185 kJ/mol，质量增大速度较缓慢，平均氧化速度也较慢；合金表面生成氧化物结构完整、
致密，主要以Al 2 O 3 为主；表面生成连续致密的Al 2 O 3 保护膜有效地阻止了Al向涂层与空气界面的外扩散和氧向涂层与基体界面的
内扩散，在3种温度下Co-Al涂层均表现出优异的抗高温氧化性能。 |
| 英文摘要: |
| In order to study the high temperature oxidation resistance of Co-Al coating on the surface of Ni-based superalloy，high
temperature oxidation tests were carried out at 800，900 and 1000 ℃ for 200 hours，and their oxidation behavior were analyzed metallo?
graphically by scanning electron microscopy (SEM)，energy disperse spectroscopy (EDS) and X-ray diffraction (XRD). The results show that
the oxidation kinetics curves of the Co-Al coatings basically obey the parabolic law and the oxidation activation energy was 78185 kJ/mol.
The mass addition of Co-Al coating was relatively slow as well as the average oxidation rate. Uniform and dense film of oxidation products,
which were mainly composed of Al 2 O 3 ，was formed on the surface of the specimen. The continuous and dense protective film effectively pre?
vents the outward diffusion of Al to the coating-air interface and the inward diffusion of O to the coating-substrate interface, the Co-Al
coating exhibits excellent high temperature oxidation resistance at three temperatures. |
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