EFFECT OF POWDER SIZE ON THE MICROSTRUCTURE AND MAGNETIC PROPERTIES OF Nd-Fe-B MAGNET ALLOY
- Title
- EFFECT OF POWDER SIZE ON THE MICROSTRUCTURE AND MAGNETIC PROPERTIES OF Nd-Fe-B MAGNET ALLOY
- Author
- 좌용호
- Keywords
- Nd-Fe-B; gas atomization; Powder size; Crystal orientation; Hot Deformation
- Issue Date
- 2019-06
- Publisher
- Polish Academy of Sciences
- Citation
- Archives of Metallurgy and Materials, v. 64, No. 2, Page. 623-626
- Abstract
- Rare earth Nd-Fe-B, a widely used magnet composition, was synthesized in a shape of powders using gas atomization, a rapid solidification based process. The microstructure and properties were investigated in accordance with solidification rate and densification. Detailed microstructural characterization was performed by using scanning electron microscope (SEM) and the structural properties were measured by using X-ray diffraction. Iron in the form of alpha-Fe phase was observed in powder of about 30 mu m. It was expected that fraction of Nd2Fe14B phase increased rapidly with decrease in powder size, on the other hand that of alpha-Fe phase was decreased. Nd-rich phase diffused from grain boundary to particle boundary after hot deformation due to capillary action. The coercivity of the alloy decreased with increase in powder size. After hot deformation, Nd2Fe14B phase tend to align to c-axis.
- URI
- http://journals.pan.pl/dlibra/publication/127589/edition/111329/contenthttps://repository.hanyang.ac.kr/handle/20.500.11754/125317
- ISSN
- 1733-3490
- DOI
- 10.24425/amm.2019.127589
- Appears in Collections:
- COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > MATERIALS SCIENCE AND CHEMICAL ENGINEERING(재료화학공학과) > Articles
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