| TiAl合金表面激光重熔Al_2O_3-13wt%TiO_2复合陶瓷涂层组织结构 |
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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Al_2O_3-13wt%TiO_2复合陶瓷涂层组织结构[J].航空材料学报,2008,28(6):51-56. |
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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,南京210016;南京航空航天大学机电学院,南京210016
2. 南京航空航天大学机电学院,南京,210016 |
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| 基金项目： | 国家自然科学基金
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江苏省自然科学基金重点项目
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| 摘 要： | 采用等离子喷涂和激光重熔复合工艺在TiAl合金表面制备了Al2O3-13wt%TiO2复合陶瓷涂层.为了减少重熔层裂纹等缺陷,采用较低的激光功率和能最密度进行重熔.用扫描电镜(SEM),能谱仪(EDS)和X射线衍射仪(XRD)分析了涂层形貌、微观结构和相组成.结果表明,经过激光重熔处理后,陶瓷涂层颗粒细化,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;激光重熔亚稳相γ-Al2O3转变为稳定相α-Al2O3;由于陶瓷材料导热系数较低的影响,激光重熔时无法使整个陶瓷层实现重熔,重熔后的陶瓷涂层形成了晶粒细小的等轴品重熔区、烧结区以及片层状残余等离子喷涂区.
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| 关 键 词： | 激光重熔 等离子喷涂 Al2O3-13wt％TiO2复合陶瓷涂层 微观组织 TiAl合金 |
Microstructure of Laser Remelted Al_2O_3-13wt%TiO_2 Composite Ceramic Coatings on TiAl Alloy Surface |
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| WANG Dong-sheng,TIAN Zong-jun,SHEN Li-da,LIU Zhi-dong,HUANG Yin-hui.Microstructure of Laser Remelted Al_2O_3-13wt%TiO_2 Composite Ceramic Coatings on TiAl Alloy Surface[J].Journal of Aeronautical Materials,2008,28(6):51-56. |
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| Authors: | WANG Dong-sheng TIAN Zong-jun SHEN Li-da LIU Zhi-dong HUANG Yin-hui |
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| Institution: | WANG Dong-sheng1,2,TIAN Zong-jun1,SHEN Li-da2,LIU Zhi-dong1,HUANG Yin-hui1,2(1.Jiangsu Key Laboratory of Precision , Micro-Manufacturing Technology,Nanjing University of Aeronautics , Astronautics,Nanjing 210016,China,2.College of Mechanical , Electrical Engineering,China) |
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| Abstract: | The Al2O3-13wt%TiO2 composite ceramic coatings prepared by plasma spraying on TiAl alloy surface were remelted by laser.To reduce the crack origination,a lower laser power and energy density was used during laser remelting.The morphology,microstructure and phase constitution of coating were investigated using X-ray diffractometry(XRD),scanning electron microscopy(SEM) and energy dispersive spectroscope(EDS),respectively.The results show that the ceramic coating has smaller grains and higher compactness afte... |
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| Keywords: | laser remelting plasma spraying Al2O3-13wt%TiO2 composite ceramic coating microstructure TiAl alloy |
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