许伟,代明江,胡芳.NdFeB永磁体表面磁控溅射铝防护镀层性能研究[J].表面技术,2014,43(1):77-80,130.
XU Wei,DAI Ming-jiang,HU Fang.Corrosion Resistance of Aluminum Film on NdFeB Permanent Magnets by Magnetron Sputtering[J].Surface Technology,2014,43(1):77-80,130 |
| NdFeB永磁体表面磁控溅射铝防护镀层性能研究 |
| Corrosion Resistance of Aluminum Film on NdFeB Permanent Magnets by Magnetron Sputtering |
| 投稿时间：2013-08-31 修订日期：2013-09-23 |
| DOI： |
| 中文关键词: NdFeB 永磁体 Al 薄膜 磁控溅射 耐腐蚀 |
| 英文关键词:NdFeB permanent magnet Al film magnetic supttering corrosion resistance |
| 基金项目:国家科技支撑计划(2012BAE02B01) |
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| Author | Institution |
| XU Wei | Faculty of Materials and Energy, Guangdong University of Technology, Guangzhou 510081, China;Institute of Surface Engineering, Guangzhou Research Institute of Nonferrous Metals, Guangzhou 510651, China |
| DAI Ming-jiang | Institute of Surface Engineering, Guangzhou Research Institute of Nonferrous Metals, Guangzhou 510651, China |
| HU Fang | Institute of Surface Engineering, Guangzhou Research Institute of Nonferrous Metals, Guangzhou 510651, China |
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| 中文摘要: |
| 目的 研究一种 NdFeB 永磁体表面腐蚀防护技术。 方法 采用磁控溅射技术,在烧结 NdFeB永磁体表面沉积一层纯铝防护薄膜,然后对纯铝薄膜进行阿洛丁化学转化复合处理,表征膜层的表面和截面形貌,并研究结构及耐腐蚀性能。 结果 沉积的 Al 中间层和 Al 薄膜均结构致密,膜 / 基界面平整,膜层的自腐蚀电流密度为 3 . 5 X10-6A / cm2,说明纯 Al 薄膜能够对 NdFeB 永磁体提供有效的防护。 阿洛丁化学转化可使铝薄膜表面更加致密,自腐蚀电流密度低至 7 . 9 X10-7A / cm2,进一步提高了纯铝薄膜的防护性能。 结论 NdFeB 永磁体表面磁控溅射镀铝是一种有效且环保的防护技术,可用于替代不环保的电镀防护。 |
| 英文摘要: |
| Objective To study a kind of technology that can be used to protect the NdFeB permanent magnets. Methods Aluminum film was deposited by magnetic sputtering on NdFeB permanent magnets. Surface and cross-section images of aluminum film were observed by a scanning electron microscope ( SEM) . The corrosion properties of samples were investigated and compared by potentiodynamic polarization and neutral salt spry test. Results The results indicated that the corrosion current density of NdFeB specimen coated with pure Al film was approximately 3. 5 X10-6A / cm2,for the sample coated with Al film and Anoding chemical conversion film,the corrosion current density was 7. 9 X10-7A / cm2 , which was about 2 orders of magnitude lower than that of the bare NdFeB magnet. The results showed that the pure Al film could provide good protection for the NdFeB substrate,and the Anoding chemical conversion could make the Al film much denser. Conclusion The aluminum coating prepared by magnetic sputtering could effectively protect the NdFeB magnets, and it is a good substitute for the current electroplating technology. |
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