期刊
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
卷 28, 期 10, 页码 927-930出版社
JOURNAL MATER SCI TECHNOL
DOI: 10.1016/S1005-0302(12)60152-2
关键词
Nd-Fe-B; Cu nano-particles; Coercivity; Corrosion resistance; Oxidation
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]
- 211 Project of Beijing University of Technology
- Rixin Talents of Beijing University of Technology
Nd-Fe-B permanent magnets with a small amount of Cu nano-particles doping have been prepared by conventional sintered method. Effects of Cu content on magnetic properties, corrosion resistance, and oxidation properties of the magnets have been studied. It shows that the coercivity rises gradually, while the remanence decreases simultaneously with increasing Cu doping amount. Microstructure observation reveals that Cu element enriches mainly the Nd-rich phase. Autoclave test results show that the corrosion rate of the magnets decreases with increasing Cu content. After oxidation, the maximum energy product loss of the magnets with 0 and 0.2 wt% Cu nano-particles doping are 6.13% and 0.99%, respectively. Therefore, it is concluded that Cu nano-particles doping is a promising way to enhance the coercivity and corrosion resistance of sintered Nd-Fe-B magnets.
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