Advanced Magnets for Power Systems
Abstract
This research is focused on (1) design of novel nanocomposite structures for high energy-product permanent magnets, (2) design of enhanced high-temperature Co-based alloys by compound-alloy modifications, and (3) development of enhanced hard and soft magnets via novel processing methods including mechanical alloying, cluster-assembled materials, and rolling techniques. Model nanocomposite hard-soft combinations have been developed with energy products of about 50 MGOe and coercivities of about 40 kOe. A theoretical understanding has been achieved of the structural characteristics needed to produce high energy products in the exchange-coupled nanocomposites. A variety of 2:17, 1:7, 5:17 and modified compounds have been investigated both experimentally and theoretical. It has been shown that transition-metal additions such as Ti, Cu, and Zr, are capable of stabilizing the disordered hexagonal Sm(CoM)7 phase with beneficial increases in anisotropy. Considerable development work on processing methods has been performed in this period.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 2002
- Accession Number
- ADA406752
Entities
People
- David J. Sellmyer
- Diandra Leslie-pelecky
- J. P. Liu
- Jeffrey Shield
- Sitaram S. Jaswal
Organizations
- University of Nebraska–Lincoln