Accession Number:

AD0743992

Title:

Research and Development of Rare Earth-Transition Metal Alloys as Permanent-Magnet Materials

Descriptive Note:

Semiannual interim technical rept. 1 Jul-31 Dec 1971

Corporate Author:

DAYTON UNIV OH RESEARCH INST

Personal Author(s):

• Ray, Alden E.
• Strnat, Karl J.

Report Date:

1972-04-01

Pagination or Media Count:

63.0

Abstract:

Mixed intermetallic phases of type R2Co1-xFex17 with RCe, Pr, Nd, Sm, Y, and MM Ce-rich mischmetal are being studied as potential permanent magnet materials. Except for RNd, all show ranges of x in which the crystallographic c-axis is the easy axis of magnetization. During the present period, these ranges have been more precisely defined and quantitative measurements of the saturation magnetization and crystal anisotropy constants initiated. The composition dependence of selected metallurgical and magnetic properties of phases of the type Nd1-xRxCo5, where RCe, Pr, and Y, are under investigation. Peritectic melting temperatures, lattice constants, Curie temperatures, and saturation-magnetization measurements are reported. Single crystals of several of the mixed phases have been prepared and saturation magnetization and room-temperature anisotropy measurements on these have been initiated.

Descriptors:

• *MAGNETIC MATERIALS
• *MAGNETS
• ANISOTROPY
• COBALT ALLOYS
• DIFFERENTIAL THERMAL ANALYSIS
• INTERMETALLIC COMPOUNDS
• IRON ALLOYS
• MAGNETIC PROPERTIES
• MANUFACTURING
• PHASE STUDIES
• RARE EARTH ELEMENTS
• SINGLE CRYSTALS
• TRANSITION TEMPERATURE

Subject Categories:

• Electrical and Electronic Equipment
• Miscellaneous Materials

Distribution Statement:

APPROVED FOR PUBLIC RELEASE