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激光熔覆Al2O3-13% TiO2陶瓷层制备及其抗热震性能
引用本文:高雪松,田宗军,沈理达,刘志东,黄因慧.激光熔覆Al2O3-13% TiO2陶瓷层制备及其抗热震性能[J].中国激光,2012,39(2):203006-96.
作者姓名:高雪松  田宗军  沈理达  刘志东  黄因慧
作者单位:高雪松:东南大学机械工程学院, 江苏 南京 210018南京航空航天大学机电学院, 江苏 南京 210016
田宗军:南京航空航天大学机电学院, 江苏 南京 210016
沈理达:南京航空航天大学机电学院, 江苏 南京 210016
刘志东:南京航空航天大学机电学院, 江苏 南京 210016
黄因慧:南京航空航天大学机电学院, 江苏 南京 210016
基金项目:国家自然科学基金(50305010)和江苏省自然科学基金重点项目(BK2004005)资助课题。
摘    要:利用高频感应辅助激光熔覆技术在镍基高温合金基体上制备了NiCoCrAl-Y2O3黏结层及Al2O3-13%TiO2(质量分数)陶瓷层。通过扫描电镜、能谱仪、X射线衍射仪分析了涂层的微观结构。实验结果表明,在高频感应辅助激光的作用下,基体与黏结层、黏结层与陶瓷层之间的界面均展现了良好的结合特性,具有明显的界面扩散现象。陶瓷层在激光的作用下形成了三维网状结构,该结构使得陶瓷材料中的TiO2材料与Al2O3材料均匀分布,减少了因不同材料聚集所产生的内应力。同时对涂层进行了热震实验,结果证明了利用高频感应辅助激光熔覆技术制备的Al2O3-13%TiO2陶瓷层具有良好的抗热震性能,适合工作于高温环境。

关 键 词:激光技术  Al2O3-13%TiO2  激光熔覆  高频感应  微观结构  热震性能
收稿时间:2011/9/5

Study on Al2O3-13% TiO2 Coatings Prepared by Laser Cladding and Thermal Shock Resistance
Gao Xuesong,Tian Zongjun,Shen Lida,Liu Zhidong,Huang Yinhui.Study on Al2O3-13% TiO2 Coatings Prepared by Laser Cladding and Thermal Shock Resistance[J].Chinese Journal of Lasers,2012,39(2):203006-96.
Authors:Gao Xuesong  Tian Zongjun  Shen Lida  Liu Zhidong  Huang Yinhui
Affiliation:1School of Mechanical Engineering,Southeast University,Nanjing,Jiangsu 210018,China 2College of Mechanical and Electrical Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing,Jiangsu 210016,China)
Abstract:NiCoCrAl-Y2O3 and Al2O3-13% TiO2 (mass fraction) coatings, formed with means of laser cladding on nickel-based alloy, are heated using high frequency induction sources. The coating and the cross-section are analysed by SEM, XRD, and EDS respectively. The results show that, MCrAlY/Al2O3-13% TiO2 ceramic coating has an excellent chemical combination due to elements obvious diffused in the interface. It is found that Al2O3-rich submicron particles embedded in the TiO2-rich matrix, three-dimensional net structure formed in ceramic coating, which could decrease inner stress between different materials. Meanwhile, thermal shock experiment of samples is tested which shows that Al2O3-13% TiO2 ceramic coating have excellent high temperature property.
Keywords:laser technique  Al2O3-13% TiO2  laser cladding  high frequency induction  thermal shock resistance
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