Bulk SmCo5/α-Fe nanocomposite permanent magnets fabricated by mould-free Joule-heating compaction
Abstract
Bulk SmCo5/α-Fe nanocomposite magnets have been prepared using a Joule-heating compaction technique. Nearly fully dense bulk magnets are obtained by compacting the milled powders under a pressure of 2 GPa at temperatures above 400 °C. Structural analysis shows that the grain size of both the SmCo5 and the α-Fe phases is in the range of 10 to 15 nm when the compaction temperature is lower than 500 °C, which ensures effective interphase exchange coupling. A further increase in compaction temperature leads to significant grain growth and deterioration of magnetic properties. A maximum energy product of about 18.5 MGOe was obtained in the bulk SmCo5/α-Fe nanocomposite magnets, which is 90% higher than that of the single-phase counterpart prepared under the same conditions.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Apr 01, 2011
- Source ID
- 10.1063/1.3563098
Entities
People
- Chuanbing Rong
- Dapeng Wang
- J. Ping Liu
- M. J. Kramer
- Narayan Poudyal
- Ying Zhang
Organizations
- Iowa State University
- Office of Naval Research
- University of Texas at Arlington