| 阳极氧化和预氧化提高渗铝TiAl合金的热腐蚀性能 |
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| 引用本文： | 胡远涛,郑磊,严豪杰,伍廉奎,林向军,曹发和,蒋梅燕. 阳极氧化和预氧化提高渗铝TiAl合金的热腐蚀性能[J]. 中国有色金属学会会刊, 2021, 31(1): 193-206. DOI: 10.1016/S1003-6326(20)65487-5 |
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| 作者姓名： | 胡远涛 郑磊 严豪杰 伍廉奎 林向军 曹发和 蒋梅燕 |
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| 作者单位： | 中山大学材料科学与工程学院;浙江工业大学材料科学与工程学院;中国人民解放军军事科学院国防工程研究院 |
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| 基金项目： | The authors are grateful for the financial supports from the National Natural Science Foundation of China(51971205);Shenzhen Science and Technology Innovation Program,China(JCYJ20190807154005593);the Fundamental Research Funds for the Central Universities,China(19lgpy20). |
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| 摘 要： | 为提高TiAl合金的抗热腐蚀性能,采用渗铝、阳极氧化和预氧化技术在TiAl合金表面制备致密的防护涂层.研究700°C下涂层保护的TiAl合金在75％Na2SO4+25％NaCl(质量分数)熔盐环境中的热腐蚀行为.结果表明,阳极氧化和预氧化可促进Al2O3防护层的形成,有效阻止热腐蚀环境下熔融盐和氧气向基体的扩散.在热腐...
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| 关 键 词： | 热腐蚀 TiAl合金 包埋法 阳极氧化 卤素效应 |
| 收稿时间： | 2020-03-03 |
Improving hot corrosion resistance of aluminized TiAl alloy by anodization and pre-oxidation |
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| Yuan-tao HU,Lei ZHENG,Hao-jie YAN,Lian-kui WU,Xiang-jun LIN,Fa-he CAO,Mei-yan JIANG. Improving hot corrosion resistance of aluminized TiAl alloy by anodization and pre-oxidation[J]. Transactions of Nonferrous Metals Society of China, 2021, 31(1): 193-206. DOI: 10.1016/S1003-6326(20)65487-5 |
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| Authors: | Yuan-tao HU Lei ZHENG Hao-jie YAN Lian-kui WU Xiang-jun LIN Fa-he CAO Mei-yan JIANG |
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| Affiliation: | 1. School of Materials Science and Engineering, Sun Yat-sen University, Guangzhou 510275, China;2. College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou 310014, China;3. Institute of Defense Engineering, AMS, PLA, Beijing 100850, China |
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| Abstract: | To shield TiAl alloy from hot corrosion attack, a compact protective coating was fabricated by the combination of aluminizing, anodization and pre-oxidation. The hot corrosion behavior of the coated-TiAl specimen was investigated in the mixture salt consisting of 75 wt.% Na2SO4 and 25 wt.% NaCl at 700 °C. Results indicated that the anodization and pre-oxidation were beneficial to the generation of Al2O3 layer, which could act as a diffusion barrier to prevent the molten salts and oxygen from diffusing into the alloy during exposure to a hot corrosion environment while the aluminizing coating could provide sufficient aluminum source to support the continuous formation of Al2O3 layer. Moreover, the internal stress of the coating was reduced due to the formation of a gradient coating consisting of TiAl3 and TiAl2. |
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| Keywords: | hot corrosion TiAl alloy pack cementation anodization halogen effect |
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