Campus Units
Materials Science and Engineering, Ames Laboratory
Document Type
Article
Publication Version
Accepted Manuscript
Publication Date
9-1-2020
Journal or Book Title
Acta Materialia
Volume
196
First Page
528
Last Page
538
DOI
10.1016/j.actamat.2020.06.058
Abstract
Samarium-cobalt alloys are used in some of the strongest permanent magnets, particularly for applications between about 200 and 550°C, but the utilization of these materials is restricted by their brittleness. Improving their mechanical resilience would allow them to be used more widely and, in some cases, substitute for neodymium-based magnet alloys which are subject to supply-chain risks. We have engineered a series of novel microstructures with bi-modal grain size distributions to achieve unprecedented combinations of mechanical and magnetic properties. Improvements up to 73% are obtained in the flexural strength of Sm2(CoFeCuZr)17 sintered magnets, with negligible impact on the magnetic properties. Our mechanically-robust, high-performance Sm-Co magnets are made without changing the chemical compositions of the materials or their heat treatment procedures, making them highly compatible with existing manufacturing processes.
Creative Commons License
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.
Copyright Owner
Acta Materialia Inc.
Copyright Date
2020
Language
en
File Format
application/pdf
Recommended Citation
Cui, Baozhi; Liu, Xubo; King, Alexander H.; Ouyang, Gaoyuan; Nlebedim, Cajetan I.; and Cui, Jun, "Overcoming Mechanical Fragility in Sm-Co Permanent Magnet Materials" (2020). Ames Laboratory Publications. 432.
https://lib.dr.iastate.edu/ameslab_pubs/432
Comments
This is a manuscript of an article published as Cui, Baozhi, Xubo Liu, Alexander H. King, Gaoyuan Ouyang, Cajetan I. Nlebedim, and Jun Cui. "Overcoming Mechanical Fragility in Sm-Co Permanent Magnet Materials." Acta Materialia 196 (2020): 528-538. DOI: 10.1016/j.actamat.2020.06.058. Posted with permission.