New manufacturing method for Fe-Si magnetic powders using modified pack-cementation process
- Authors
- Byun, Ji Young; Kim, Jang Won; Han, Jeong Whan; Jang, Pyungwoo
- Issue Date
- 2013-03
- Publisher
- KOREAN INST METALS MATERIALS
- Citation
- METALS AND MATERIALS INTERNATIONAL, v.19, no.2, pp.267 - 271
- Abstract
- This paper describes a new method for making Fe-Si magnetic powders using a pack-cementation process. It was found that Fe-Si alloy powders were formed by a reaction of the pack mixture of Fe, Si, NaF, and Al2O3 powders at 900 A degrees C for 24 h under a hydrogen atmosphere. Separation of the Fe-Si alloy powders was dependent on the particle size of the Fe powders in the pack. For small Fe powders, magnetic separation in a medium of strong alkali solution was recommended. But, for relatively larger Fe powders, the Fe-Si alloy powders were easily separated from Al2O3 powders using a magnet in air atmosphere. The Si content in the Fe-Si magnetic powders were easily controlled by changing the weight ratio of Si to (Si+Fe) in the pack.
- Keywords
- SPRAY-PYROLYSIS; SPRAY-PYROLYSIS; magnetic materials; chemical synthesis; powder processing; diffusion; compressed core
- ISSN
- 1598-9623
- URI
- https://pubs.kist.re.kr/handle/201004/128295
- DOI
- 10.1007/s12540-013-2022-1
- Appears in Collections:
- KIST Article > 2013
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