| 超音速颗粒轰击处理对MCrAlY涂层TGO生长的影响 |
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| 引用本文： | 王志平,逄颖,冯日宝,丁坤英.超音速颗粒轰击处理对MCrAlY涂层TGO生长的影响[J].焊接学报,2008,29(6):25-28. |
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| 作者姓名： | 王志平 逄颖 冯日宝 丁坤英 |
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| 作者单位： | 1. 中国民航大学,理学院,天津,300300
2. 中国民航大学,安全科学与工程学院,天津,300300 |
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| 摘 要： | 采用超音速火焰喷涂方法在镍基高温合金(GH99)上制备了MCrAlY涂层,并进行超音速颗粒轰击处理,研究了超音速颗粒轰击工艺对MCrAlY涂层显微结构和热生长氧化物(TGO)的影响.结果表明,通过表面轰击处理,增加了涂层中Al元素的扩散通道;高温氧化过程中MCrAlY涂层表面很快形成连续致密的Al2O3膜,保护了Ni,Cr等元素避免被氧化,从而避免了Ni(Cr,Al)2O4,NiO等大颗粒氧化物的生成;这样减少了涂层中的裂纹产生和扩展的可能性,从而提高涂层抗高温氧化性能.
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| 关 键 词： | 热障涂层 超音速颗粒轰击 热生长氧化物 |
| 收稿时间： | 2007/11/22 0:00:00 |
Effect of surface nanocrystallization of MCrAlY coating on TGO |
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| WANG Zhiping,PANG Ying,FENG Ribao and DING Kunying.Effect of surface nanocrystallization of MCrAlY coating on TGO[J].Transactions of The China Welding Institution,2008,29(6):25-28. |
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| Authors: | WANG Zhiping PANG Ying FENG Ribao and DING Kunying |
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| Affiliation: | College of Sciences, Civil Aviation University of China, Tianjin 300300, China,College of Safety, Civil Aviation University of China, Tianjin 300300, China,College of Sciences, Civil Aviation University of China, Tianjin 300300, China and College of Sciences, Civil Aviation University of China, Tianjin 300300, China |
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| Abstract: | Thermal barrier coating, obtained by high velocity oxygen furel thermal spraying (HOVF) on GH99 high-temperature alloy was treated by supersonic fine particles bombarding, and its influence on microstructure and thermally grown oxide (TGO) of MCrAlY bond coating was studied.The experimental results show that the diffusision access of Al-element increased with supersonic treating, then Al2O3 formed quickly onMCrAlY surface, and Ni, Cr were prevented from oxidizing.For this reason, Ni(Cr,Al)2O4, NiO avoided forming, and flaw decreased, so that the high temperature oxidation resistance of coating con be improved. |
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| Keywords: | thermal barrier coating supersonic fine particles bombarding thermally grown oxide |
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