| TiAl合金表面激光重熔热障涂层组织及抗高温氧化性能 |
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| 引用本文： | 王东生,田宗军,沈理达,刘志东,黄因慧.TiAl合金表面激光重熔热障涂层组织及抗高温氧化性能[J].功能材料,2009,40(4). |
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| 作者姓名： | 王东生 田宗军 沈理达 刘志东 黄因慧 |
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| 作者单位： | 1. 南京航空航天大学江苏省精密与微细制造技术重点实验室,江苏南京,210016;南京航空航天大学机电学院,江苏南京,210016
2. 南京航空航天大学机电学院,江苏南京,210016 |
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| 基金项目： | 国家自然科学基金资助项目(59975046,50305010);;江苏省自然科学基金重点资助项目(BK2004005) |
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| 摘 要： | 为了进一步提高TiAl合金表面等离子喷涂ZrO2-7%(质量分数)Y203热障陶瓷涂层的性能,采用激光重熔工艺对涂层进行处理,研究了激光重熔对涂层微观组织和抗高温氧化性能的影响.用扫描电镜(SEM)分析了涂层形貌和微观结构,同时对其抗高温(850℃)氧化性能进行了考察.结果表明,等离子喷涂热障陶瓷涂层呈典型的层状堆积特征,有一定的孔隙且分布有微裂纹;经过激光重熔处理后,陶瓷涂层片层状组织得以消失,致密性提高,获得了基本没有裂纹等缺陷的重熔层;整个重熔层包括界面没有明显特征的平面晶和上部沿热流方向生长的柱状晶组织.等离子喷涂热障涂层具有较好的抗高温氧化性能,经过激光重熔后可进一步提高其抗高温氧化能力.
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| 关 键 词： | 激光重熔 等离子喷涂 热障涂层 组织 TiA1合金 |
Microstructure and high-temperature oxidation resistance of laser-remelted thermal barrier coatings on TiAl alloy surface |
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| WANG Dong-sheng
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TIAN Zong-jun
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SHEN Li-da
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LIU Zhi-dong
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HUANG Yin-hui.Microstructure and high-temperature oxidation resistance of laser-remelted thermal barrier coatings on TiAl alloy surface[J].Journal of Functional Materials,2009,40(4). |
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| Authors: | WANG Dong-sheng TIAN Zong-jun SHEN Li-da LIU Zhi-dong HUANG Yin-hui |
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| Affiliation: | 1.Jiangsu Key Laboratory of Precision and Micro-Manufacturing Technology;Nanjing University of Aeronautics and Astronautics;Nanjing 210016;China;2.College of Mechanical and Electrical Engineering;China |
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| Abstract: | In order to improve the properties of the ZrO2-7wt%Y2O3 thermal barrier coatings(TBCs) prepared by plasma spraying on TiAl alloy surface,laser remelting experiment was carried out and the effects of laser remelting on microstructure and high-temperature oxidation resistance on coatings were studied.The morphology and microstructure of the coatings were investigated by meaning of scanning electron microscopy(SEM).Meanwhile,the high-temperature oxidation behavior of the coatings was researched.The results sho... |
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| Keywords: | laser remelting plasma spraying thermal barrier coatings microstructure TiAl alloy |
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