Behaviour of CaO coating of gas atomized Mg powders using mechanical milling process
- Authors
- Kim, Sun-Mi; Kim, Yong Hwan; Kim, Young Do; Kim, Taek-Soo
- Issue Date
- Jun-2011
- Publisher
- ELSEVIER SCIENCE SA
- Keywords
- Mg powder; Gas atomization; Mechanical milling; Desulfurization; CaO coating
- Citation
- JOURNAL OF ALLOYS AND COMPOUNDS, v.509, pp.S503 - S506
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF ALLOYS AND COMPOUNDS
- Volume
- 509
- Start Page
- S503
- End Page
- S506
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/168323
- DOI
- 10.1016/j.jallcom.2011.02.078
- ISSN
- 0925-8388
- Abstract
- In order to synthesize a thermally stable Mg powder as a desulfurizer of iron, pure Mg was gas atomized to powders and coated by CaO powders, to produce a thermally stable desulfurizer using a mechanical milling process. Since the effect of desulfurization is dependent on the degree of surface modification, coating behaviours such as the size, morphology and layer thickness were investigated as a function of milling condition. As the milling conducted from 10 min to 30 min, 1 h, 3 h, 6 h, 12 h, CaO particles began to stick on the surface of Mg powders. The layer of CaO formed from 1 h milling was about 17 mu m thick and gradually thickened to be 28 mu m, 32 mu m and 37 mu m with increasing the milling time to 3 h, 6 h and 12 h, respectively. The shape of coated powder became more spherical after 1 h milling, being mostly spherical after 6 h. Desulfurization rate and uniformity were evaluated for the various thickness of the coating layer.
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