AlN/Al dual protective coatings on NdFeB by DC magnetron sputtering |
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| Authors: | Jinlong Li Shoudong Mao Kefei Sun Xiaomin Li Zhenlun Song |
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| Affiliation: | aZhejiang Province Key Laboratory of Magnetic Materials and Application Technology, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China;bShanghai Institute of Ceramics Chinese Academy of Sciences, Shanghai 200050, China |
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| Abstract: | AlN/Al dual protective coatings were prepared on NdFeB by DC magnetron sputtering in a home-made industrial apparatus. Comparing with Al coating, AlN/Al coatings have a denser structure of an outmost AlN amorphous layer following an inner Al columnar crystal layer. The coatings and NdFeB substrate combine well, and moreover, there is occurrence of metallurgy bonding in the interface layer. Both Al and AlN/Al coatings have a good protective ability to NdFeB. Especially, the corrosion resistance of AlN/Al coated NdFeB is improved largely. AlN/Al and Al protective coatings not only do not deteriorate the magnetic properties of NdFeB, but contribute to their slight increase. |
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| Keywords: | NdFeB AlN/Al coating Corrosion Magnetic property |
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