| 激光熔覆纳米Al2O3复合陶瓷涂层的组织结构 |
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| 引用本文： | 刘润,赵剑峰,黄因慧,花国然. 激光熔覆纳米Al2O3复合陶瓷涂层的组织结构[J]. 应用激光, 2003, 23(5): 258-260 |
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| 作者姓名： | 刘润 赵剑峰 黄因慧 花国然 |
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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： | 国家自然科学基金资助项目 (编号 :5 9975 0 4 6 ) |
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| 摘 要： | 研究了 4 5 #钢表面激光熔覆纳米Al2 O3 复合陶瓷涂层的微观组织结构、显微硬度和磨损特性。结果表明 ,激光熔覆层由α-Al2 O3 和TiO2 以及Al2 O3 纳米颗粒组成 ,在激光的作用下 ,消除了原来等离子喷涂层的片层状组织 ;纳米颗粒仍然保持纳米尺度 ,填充在涂层的大颗粒之间 ,起着桥连的作用 ;同时涂层气孔率的降低使涂层致密化程度得以提高 ,纳米Al2 O3涂层的显微硬度较高 ,且其耐磨性能明显优于等离子Al2 O3 +1 3%TiO2 喷涂层
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| 关 键 词： | 纳米Al2O3 激光熔覆 复合陶瓷涂层 组织结构 |
Microstructure of Laser-Cladding n-Al2O3 Composite Ceramic Coating |
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| Liu Run Zhao Jianfeng Huang Yinhui Hua Guoran. Microstructure of Laser-Cladding n-Al2O3 Composite Ceramic Coating[J]. Applied Laser, 2003, 23(5): 258-260 |
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| Authors: | Liu Run Zhao Jianfeng Huang Yinhui Hua Guoran |
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| Abstract: | The microstructure, microhardness and characteristics of wear of laser-cladding n-Al2O3 composite ceramic coatings on 45 steel are studied. The results show that lamellas structure characteristics of plasma-sprayed coating have been eliminated after laser-cladding and n-Al2O3 composite ceramic coating consists of α-Al2O3，TiO2 and nano Al2O3 particles. A great deal of nano-Al2O3 particles have been found because laser heats and cools at the very high speed, and they are filled between the particles of composite ceramic coating and plays an important role in the performance of ceramic coating. The ceramic coating displays rather dense, that is, it possesses a low porosity. Laser-cladding nano- Al 2O 3 ceramic coating has the higher hardness and obviously superior wear resistance than plasma spraying Al2O3+13%TiO2 coating. |
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| Keywords: | Nano Al 2O 3 Laser-cladding Composite ceramic coating Microstructure |
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