Novel pre-alloyed powder processing of modified alnico 8: Correlation of microstructure and magnetic properties
Abstract
Progress is reviewed on development of an improved near-final bulk magnet fabrication process for alnico 8, as a non-rare earth permanent magnet with promise for sufficient energy density and coercivity for electric drive motors. This study showed that alnico bulk magnets in near-final shape can be made by simple compression molding from spherical high purity gas atomized pre-alloyed powder. Dwell time at peak sintering temperature (1250°C) greatly affected grain size of the resulting magnet alloys. This microstructure transformation was demonstrated to be useful for gaining partially aligned magnetic properties and boosting energy product. Furthermore, while a route to increased coercivity was not identified by these experiments, manufacturability of bulk alnico magnet alloys in near-final shapes was demonstrated, permitting further processing and alloy modification experiments that can target higher coercivity and better control of grain anisotropy during grain growth.
- Authors:
-
- Ames Lab. and Iowa State Univ., Ames, IA (United States)
- Publication Date:
- Research Org.:
- Ames Lab., Ames, IA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1225377
- Report Number(s):
- IS-J-8494
Journal ID: ISSN 0021-8979; JAPIAU
- Grant/Contract Number:
- AC02-07CH11358
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Applied Physics
- Additional Journal Information:
- Journal Volume: 117; Journal Issue: 17; Journal ID: ISSN 0021-8979
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 42 ENGINEERING; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; sintering; magnets; coercive force; permanent magnets; nanopowders
Citation Formats
Anderson, I. E., Kassen, A. G., White, E. M. H., Zhou, L., Tang, W., Palasyuk, A., Dennis, K. W., McCallum, R. W., and Kramer, M. J. Novel pre-alloyed powder processing of modified alnico 8: Correlation of microstructure and magnetic properties. United States: N. p., 2015.
Web. doi:10.1063/1.4916996.
Anderson, I. E., Kassen, A. G., White, E. M. H., Zhou, L., Tang, W., Palasyuk, A., Dennis, K. W., McCallum, R. W., & Kramer, M. J. Novel pre-alloyed powder processing of modified alnico 8: Correlation of microstructure and magnetic properties. United States. https://doi.org/10.1063/1.4916996
Anderson, I. E., Kassen, A. G., White, E. M. H., Zhou, L., Tang, W., Palasyuk, A., Dennis, K. W., McCallum, R. W., and Kramer, M. J. Mon .
"Novel pre-alloyed powder processing of modified alnico 8: Correlation of microstructure and magnetic properties". United States. https://doi.org/10.1063/1.4916996. https://www.osti.gov/servlets/purl/1225377.
@article{osti_1225377,
title = {Novel pre-alloyed powder processing of modified alnico 8: Correlation of microstructure and magnetic properties},
author = {Anderson, I. E. and Kassen, A. G. and White, E. M. H. and Zhou, L. and Tang, W. and Palasyuk, A. and Dennis, K. W. and McCallum, R. W. and Kramer, M. J.},
abstractNote = {Progress is reviewed on development of an improved near-final bulk magnet fabrication process for alnico 8, as a non-rare earth permanent magnet with promise for sufficient energy density and coercivity for electric drive motors. This study showed that alnico bulk magnets in near-final shape can be made by simple compression molding from spherical high purity gas atomized pre-alloyed powder. Dwell time at peak sintering temperature (1250°C) greatly affected grain size of the resulting magnet alloys. This microstructure transformation was demonstrated to be useful for gaining partially aligned magnetic properties and boosting energy product. Furthermore, while a route to increased coercivity was not identified by these experiments, manufacturability of bulk alnico magnet alloys in near-final shapes was demonstrated, permitting further processing and alloy modification experiments that can target higher coercivity and better control of grain anisotropy during grain growth.},
doi = {10.1063/1.4916996},
journal = {Journal of Applied Physics},
number = 17,
volume = 117,
place = {United States},
year = {Mon Apr 13 00:00:00 EDT 2015},
month = {Mon Apr 13 00:00:00 EDT 2015}
}
Web of Science
Works referenced in this record:
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Works referencing / citing this record:
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journal, February 2018
- Lee, Sunkey; Lee, Seungmin; Kim, Sangwon
- Scientific Reports, Vol. 8, Issue 1
Processing of Alnico Magnets by Additive Manufacturing
journal, November 2019
- White, Emma; Rinko, Emily; Prost, Timothy
- Applied Sciences, Vol. 9, Issue 22
Fabrication and Characterization of a Magnetic Drilling Actuator for Navigation in a Three-dimensional Phantom Vascular Network
text, January 2018
- Lee, Sunkey; Lee, Seungmin; Kim, Sangwon
- ETH Zurich