Accession Number:

AD0773177

Title:

Technology Development for Transition Metal-Rare Earth High-Performance Magnetic Materials

Descriptive Note:

Final technical rept. 30 Jun 1970-30 Jun 1973

Corporate Author:

GENERAL ELECTRIC CORPORATE RESEARCH AND DEVELOPMENT SCHENECTADY NY

Personal Author(s):

• Becker, J. J.
• Benz, M. G.
• Cech, R. E.
• Charles, R. J.
• Doser, M.

Report Date:

1973-06-30

Pagination or Media Count:

183.0

Abstract:

The development of the technology for transition metal-rare earth high-performance magnetic materials that has taken place over the three year contract period is described in this report. This work has covered three general areas the origin of the coercive force in high-anisotropy materials, phase equilibrium and chemistry, and studies of new materials and processing variables. The coercive force of single particles has been shown to be controlled by defects whose nature determines the behavior of magnetization discontinuities. Magnetic domain observations have been used to measure domain wall energies in several cobalt-rare-earths. The domain behavior of sintered magnets has been observed and correlated with their magnetic properties.

Descriptors:

• *MAGNETIC ALLOYS
• *PERMANENT MAGNETS
• ANISOTROPY
• COBALT ALLOYS
• INTERMETALLIC COMPOUNDS
• MAGNETIC DOMAINS
• MAGNETIC PROPERTIES
• MANUFACTURING
• RARE EARTH COMPOUNDS
• SINTERING

Subject Categories:

• Electrical and Electronic Equipment
• Metallurgy and Metallography

Distribution Statement:

APPROVED FOR PUBLIC RELEASE