期刊
JOURNAL OF RARE EARTHS
卷 31, 期 1, 页码 65-68出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/S1002-0721(12)60236-1
关键词
Nd-Fe-B; coercivity; corrosion resistance; Al nano-particles; rare earths
资金
- National Natural Science Foundation of China [51001002]
- Research Fund for the Doctoral Program of Higher Education of China [20091103120024]
- National High Technology Research and Development Program of China [2012AA063201]
- Key Program of Science and Technology Development Project of Beijing Municipal Education Commission [KZ201110005007]
- Importation and Development of High-Caliber Talents Project of Beijing Municipal Institutions
- 211 Project of Beijing University of Technology
- Rixin Talents of Beijing University of Technology
Nd-Fe-B permanent magnets with a small amount of Al nano-particles doping were prepared by conventional sintered method. Effect of Al content on magnetic property, corrosion resistance and oxidation properties of the magnets were studied. Investigation showed that the coercivity rose gradually, while the remanence decreased simultaneously with increase of Al doping amount. Further investigation revealed that most Al element diffused into the main phase and some Al element diffused into the Nd-rich phase. The autoclave test results showed that the corrosion rate of the magnets decreased with Al content increasing. After oxidation, the maximum energy product losses of the magnets with 0.0 wt.% and 0.2 wt.% Al nano-particles doping were 6.13% and 3.99%, respectively. Therefore, Al nano-particles doping was a promising way to enhance the coercivity and corrosion resistance of sintered Nd-Fe-B magnet.
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