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摘要:
A rotation coating technique was used to apply Zn layer onto MQP-S Nd-Fe-B spherical powders, aiming to enhance their anti -oxidation properties while maintaining their high magnetic performance. As the coating temperature increases and duration extends, the Zn layer thickness grows, subsequently leading to a reduction in powder magnetization primarily due to the introduction of nonmagnetic Zn. A certain level of degradation of the original Nd-Fe-B powders also occurs during coating, which appears to be relatively minor, as the powders ' coercivity remains almost unchanged after coating. All powders coated under different conditions effectively prevent further oxidation, maintaining almost unaltered magnetization during high -temperature tests. It demonstrates that rotation coating using lower melting point metals is a simple yet effective method to enhance the anti -oxidation capability of Nd-Fe-B powders. Moreover, this approach is easily scalable, which is important for applications in fabricating metal injection molding or bonded magnets.
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来源 :
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
ISSN: 0304-8853
年份: 2024
卷: 597
2 . 7 0 0
JCR@2022
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