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Published in: Metals and Materials International 12/2022

14-05-2022

Successful Consolidation of Inoculant Alloy by Controlling Brazil Nut Effect and Capillary Force

Authors: Seong-Beum Kim, Jae-Sang Lee, Jung-Wook Cho

Published in: Metals and Materials International | Issue 12/2022

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Abstract

Novel inoculant alloy (IA) for dispersion of inoculants in molten metal was developed. By mixing powders of inoculant and matrix, 3 combinations of IAs having different inoculants (TiN, Ce2O3) and size of matrix powder (coarse, fine) were produced and added into molten metal the confirm dispersion and refining effect. Also, how these 2 variables can affect to dispersion was investigated. The combination of TiN + coarse matrix powder (T–C) does not melt and failed to disperse because of continuously-networked structure of TiN originated from larger size of matrix powder than the inoculant. The combination of Ce2O3 + fine matrix powder (C–F) made of powders of similar size melted, however, failed because Ce2O3 agglomerated because of capillary force varying with inoculant species. Comparing capillary forces for different inoculants shows that Ce2O3 has stronger agglomeration tendency than TiN. The combination of TiN + fine matrix powder (T–F) made of TiN having weaker agglomeration tendency and fine matrix powder disperse inoculants and refine solidification structure.

Graphical Abstract

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Metadata
Title
Successful Consolidation of Inoculant Alloy by Controlling Brazil Nut Effect and Capillary Force
Authors
Seong-Beum Kim
Jae-Sang Lee
Jung-Wook Cho
Publication date
14-05-2022
Publisher
The Korean Institute of Metals and Materials
Published in
Metals and Materials International / Issue 12/2022
Print ISSN: 1598-9623
Electronic ISSN: 2005-4149
DOI
https://doi.org/10.1007/s12540-022-01183-y

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