| TiAl合金表面激光重熔陶瓷涂层组织及耐磨性能 |
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| 引用本文： | 田宗军,王东生,沈理达,黄因慧,刘志东.TiAl合金表面激光重熔陶瓷涂层组织及耐磨性能[J].南京航空航天大学学报,2009,41(3). |
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| 作者姓名： | 田宗军 王东生 沈理达 黄因慧 刘志东 |
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| 作者单位： | 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，江苏省自然科学基金(BK2004005)重点资助项目 |
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| 摘 要： | 为了提高TiAl合金耐磨性能,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Al2O2-13% TiO2(质量分数)复合陶瓷涂层.用扫描电镜(SEM)和显微硬度计分析了涂层微观结构和显微硬度,同时对涂层的磨损特性进行了考察.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.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晶重熔区、烧结区以及片层状残余等离子喷涂区.激光重熔处理后涂层的显微硬度明显提高,其耐磨性能也明显优于原等离子喷涂层.
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| 关 键 词： | 激光重熔 等离子喷涂 陶瓷涂层 微观组织 耐磨性能 |
Microstructure and Wear Resistance of Laser Remelted Ceramic Coatings on TiAl Alloy Surface |
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| Tian Zongjun,Wang Dongsheng,Shen Lida,Huang Yinhui,Liu Zhidong.Microstructure and Wear Resistance of Laser Remelted Ceramic Coatings on TiAl Alloy Surface[J].Journal of Nanjing University of Aeronautics & Astronautics,2009,41(3). |
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| Authors: | Tian Zongjun Wang Dongsheng Shen Lida Huang Yinhui Liu Zhidong |
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| Institution: | College of Mechanical and Electrical Engineering;Nanjing University of Aeronautics & Astronautics;Nanjing;210016;China |
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| Abstract: | To improve wear resistance of TiAl alloy,Al2O3-13%TiO2(mass fraction) composite ceramic coatings prepared by plasma spraying on TiAl alloy surface are remelted by the laser.The morphology,microstructure and microhardness are investigated using scanning electron microscopy(SEM) and microhardness measurement.Meanwhile,the wear behavior of the coatings is studied.Results show that the ceramic coating has smaller grains and higher compactness,and the lamellar structure of plasma-sprayed coating is eliminated af... |
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| Keywords: | laser remelting plasma spraying ceramic coating microstructure wear resistance |
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