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Influence of oxygen on the structure of Nd-rich phase in the sintered Nd15Fe77B8 magnet |
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| Authors: | Jung-Pil Yang S. H. Pi Y. P. Kim Young G. Kim |
| Affiliation: | Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, P.O. Box 150, Cheongryang, Seoul, South Korea |
| Abstract: | The structures and compositions of the Nd-rich phases in the sintered Nd15Fe77B8 magnets have been investigated. Two different Nd-rich phases of the fcc and dhcp (double hexagonal close packed) structures were present. Microstructural examinations revealed that oxygen played an important role in the structure of the Nd-rich phase. Wavelength Dispersive Spectrometry (WDS) and Auger Electron Spectroscopy (AES) analyses showed that the fcc Nd-rich phase contained a considerable amount of oxygen (about 20 at%), but the dhcp Nd-rich phase had a much lower amount of oxygen. |
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