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EFFECT OF DyMn ALLOY-POWDER ADDITION ON MICROSTRUCTURE AND MAGNETIC PROPERTIES OF NdFeB SINTERED MAGNETS
- Authors
- Lee, M-W.; Dhakal, D. R.; Kim, T. H.; Lee, S. R.; Kim, H. J.; Jang, T. S.
- Issue Date
- 2015
- Publisher
- POLSKA AKAD NAUK, POLISH ACAD SCIENCES, INST METALL & MATER SCI PAS
- Keywords
- NdFeB sintered magnets; DyMn-alloy powder; Coercivity; Low melting point element
- Citation
- ARCHIVES OF METALLURGY AND MATERIALS, v.60, no.2, pp.1407 - 1409
- Indexed
- SCIE
SCOPUS
- Journal Title
- ARCHIVES OF METALLURGY AND MATERIALS
- Volume
- 60
- Number
- 2
- Start Page
- 1407
- End Page
- 1409
- ISSN
- 1733-3490
- Abstract
- Micostructural change and corresponding effect on coercivity of a NdFeB sintered magnet mixed with small amount of DyMn powder was investigated. In the sintered magnet mixed with the DyMn alloy-powder Dy-rich shell was formed at outer layer of the main grains, while Mn was mostly concentrated at Nd-rich triple junction phase (TJP), lowering melting temperature of the Nd-rich phase that eventually improved the microstructural characteristics of the gain boundary phase. The coercivity of a magnet increased more than 3.5 kOe by the mixing of the DyMn alloy-powder.
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