Planar High Energy Permanent Magnets.
Abstract
The purpose of the program is to demonstrate the feasibility of fabricating cobalt-rare earth permanent magnets by the arc plasma spraying process. Property goals for spray-fabricated magnets consisted of a coercive force of 6000 oersteds and an energy product of 8 million gauss-oersteds. During this reporting period, magnet samples were fabricated in disk and tube shapes mostly using a spray powder of nominal composition 37.2 wt.% Sm-Co. Magnetic properties of sprayed magnets were enhanced by post-spray heat treatment and aging. Conventional and novel heat treatment methods were investigated. Second and third quadrant demagnetization curves were obtained. Density, microstructure, crystallographic orientation, reproducibility and thermal stability were studied. The best magnet produced during this program displayed a coercive force of approximately 5000 oersteds and an energy product of 7.3 million gauss-oersteds. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1974
- Accession Number
- AD0780085
Entities
People
- M. C. Willson
- R. J. Janowiecki
Organizations
- Monsanto