Transmission electron microscopy studies of sintered Nd-Fe-B magnets prepared by cyclic sintering
- Title
- Transmission electron microscopy studies of sintered Nd-Fe-B magnets prepared by cyclic sintering
- Author
- 김영도
- Keywords
- PERMANENT-MAGNETS; NDFEB; COERCIVITY
- Issue Date
- 2012-04
- Publisher
- American Institute of Physics
- Citation
- Journal of Applied Physics, Apr 2012, 111(7), P.07A720, 3P.
- Abstract
- A cyclic sintering process was demonstrated to achieve higher magnetic and mechanical properties due to homogeneous distribution of the Nd-rich phase during sintering. Densification greater than 98% of the theoretical density was achieved by the cyclic sintering of the Nd-Fe-B powder. In this study, transmission electron microscopy was used to evaluate the microstructural changes of the cyclically sintered Nd-Fe-B magnets. The Nd-rich triple junction phase in the cyclic sintered sample was h-Nd2O3 and the Nd-rich grain boundary phase was a mixture of h-Nd2O3 and h-Nd amorphous thin layers. The coercivity and bending strength increased from 1666.8 to 1828.5 kA/m and from 301.8 to 520 MPa, respectively.
- URI
- https://aip.scitation.org/doi/10.1063/1.3676234http://hdl.handle.net/20.500.11754/49027
- ISSN
- 0021-8979
- DOI
- 10.1063/1.3676234
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > MATERIALS SCIENCE AND ENGINEERING(신소재공학부) > Articles
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