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| 激光熔凝NiAl/纳米Al2O3化学复合镀层抗高温氧化性能 | |
| 引用本文： | 杨理京,孔凡志,姚建华.激光熔凝NiAl/纳米Al2O3化学复合镀层抗高温氧化性能[J].激光与光电子学进展,2013,50(1):11404-171. |
| 作者姓名： | 杨理京 孔凡志 姚建华 |
| 作者单位： | 杨理京:浙江工业大学激光加工技术工程研究中心, 浙江 杭州 310014 孔凡志:浙江工业大学激光加工技术工程研究中心, 浙江 杭州 310014 姚建华:浙江工业大学激光加工技术工程研究中心, 浙江 杭州 310014 |
| 基金项目： | 浙江省教育厅科研项目（20070305）和浙江省重中之重学科开放基金（20100702）资助课题。 |
| 摘 要： | 采用大功率连续横流CO2激光对化学复合镀NiAl/纳米Al2O3复合镀层进行激光熔凝处理,并对熔凝层的抗高温氧化性能进行研究。采用X射线衍射仪(XRD)、扫描电镜(SEM)和能谱仪(EDS)等分别对高温氧化前后的表面形貌、物相组织和元素组成进行表征分析。与复合镀层和基体试样相比,激光熔凝后表面抗高温氧化性能明显提高,这一方面与激光熔凝镀层中的金属间化合物NiAl2O4、Ni0.77AlFe0.23在800℃时具有良好的抗高温氧化性有关,另一方面是由于激光熔凝后镀层表面形成了连续致密的氧化膜。 |
| 关 键 词： | 激光技术 激光熔凝 化学复合镀 抗高温氧化性 激光复合表面改性 |
| 收稿时间： | 2012/9/17 |
High-Temperature Oxidation Resistance of Laser Remelted Electroless NiAl/Nano Al2O3 Composite Coating |
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| Yang Lijing Kong Fanzhi Yao Jianhua.High-Temperature Oxidation Resistance of Laser Remelted Electroless NiAl/Nano Al2O3 Composite Coating[J].Laser & Optoelectronics Progress,2013,50(1):11404-171. | |
| Authors: | Yang Lijing Kong Fanzhi Yao Jianhua |
| Affiliation: | Yang Lijing Kong Fanzhi Yao Jianhua(Research Center of Laser Processing Technology and Engineering,Zhejiang University of Technology, Hangzhou,Zhejiang 310014,China) |
| Abstract: | Transverse-flow CO2 laser is used to strengthen the NiAl/nano Al2O3 electroless composite plating by laser remelting. Then high-temperature oxidation resistance experiments at 800 ℃ of laser remelted coating are carried out. The surface profile, microstructure and high-temperature oxidation resistance of plated coatings before and after laser remelting are analyzed by energy dispersive X-ray spectrum (EDS), scanning electron microscopy (SEM) and X-ray diffractometry (XRD). The high-tempetature oxidation resistance of laser remelted coating is remarkably improved compared with the original composite plate and substrate. On the one hand, the intermetallics NiAl2O4 and Ni0.77AlFe0.23 of laser remelted coating contribute to enhance high-temperature oxidation resistance at 800 ℃; on the other hand, a dense and continuous oxidation film is formed on the coating surface after laser remelting. |
| Keywords: | laser technique laser remelting electroless composite plating high-temperature oxidation resistance laser composite surface modification |
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