Journal of Northeastern University(Natural Science) ›› 2021, Vol. 42 ›› Issue (11): 1562-1568.DOI: 10.12068/j.issn.1005-3026.2021.11.007

• Materials & Metallurgy • Previous Articles     Next Articles

Effect of Substrate Temperature on Corrosion Resistance of NdFeB-Based TiN Protective Film

XIE Yuan-hua1, DENG Wen-yu2, WANG Peng-yang1, WAN Yi1   

  1. 1. School of Mechanical Engineering & Automation, Northeastern University, Shenyang 110819, China; 2. Shenyang General Magnetic Co., Ltd., Shenyang 110168, China.
  • Revised:2020-06-15 Accepted:2020-06-15 Published:2021-11-19
  • Contact: XIE Yuan-hua
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Abstract: In the process of NdFeB rare-earth permanent magnet corrosion protection, the substrate temperature of TiN protective membrane takes a great influence on protective effect. The magnetron sputtering technology was carried out to deposit TiN film on NdFeB permanent magnet surface and the effects of substrate temperature on the microstructure and corrosion protection performance of TiN film were studied through FESEM, XRD, electrochemical detection and permanent magnetic nondestructive testing technologies. The results showed that the substrate temperature had a great influence on the film’s property. The increase of temperature was conducive to the growth of grain and to promote the TiN (111) texture. It was found that the corrosion resistance of the film was the strongest at the substrate temperature of 300℃ with the greatest loss of magnetic property. When the substrate temperature was 100℃, the film had the best protective performance on the substrate, associated with a stronger corrosion resistance and less loss of magnetic property.

Key words: magnetron sputtering; TiN; substrate temperature; corrosion resistance; magnetic properties

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