Melt-spun Pr sub 2 (Fe sub 1 minus x Co sub x ) sub 14 B permanent magnet materials

Journal Article · Tue May 01 00:00:00 EDT 1990 · Journal of Applied Physics; (USA)

DOI:https://doi.org/10.1063/1.344799· OSTI ID:6948071

Fuerst, C D ^[1]

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1. Physics Department, General Motors Research Laboratories, Warren, Michigan 48090-9055 (USA)

The substitution of cobalt for iron is known to increase the Curie temperature and stabilize the magnetic properties of melt-spun Nd{sub 2}(Fe{sub 1{minus}{ital x}}Co{sub {ital x}}){sub 14}B ribbons. The preparation of optimum permanent magnets from cobalt-substituted materials is, however, complicated by the need for nonstoichiometric starting materials which vary with the level of cobalt concentration. This paper contains the results of selecting compositions which optimize the room-temperature properties of melt-spun ribbons containing Pr{sub 2}(Fe{sub 1{minus}{ital x}}Co{sub {ital x}}){sub 14}B as the principal constituent. The hard magnetic properties of 11 cobalt concentrations were examined spanning the range {ital x}=0 to 1, inclusive. For cobalt concentrations up to {ital x}=0.5, the remanence and energy product did not change substantially from the {ital x}=0 values of 8 kG and 12 MGOe, respectively. Remanence and energy product decreased monotonically to their endpoint values of {similar to}5 kG and {similar to}5 MGOe for cobalt-rich alloys ({ital x}{gt}0.5). The coercivity increased smoothly from 13 kOe for {ital x}=0 to 25 kOe for {ital x}=1. There was no evidence of the down turn in {ital H}{sub {ital ci}} normally associated with decreasing anisotropy.

• OSTI ID: 6948071
• Journal Information: Journal of Applied Physics; (USA), Vol. 67:9; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COBALT BORIDES
MAGNETIC PROPERTIES
IRON BORIDES
PRASEODYMIUM BORIDES
ANISOTROPY
COERCIVE FORCE
MAGNETIC MATERIALS
MEDIUM TEMPERATURE
PERMANENT MAGNETS
BORIDES
BORON COMPOUNDS
COBALT COMPOUNDS
IRON COMPOUNDS
MAGNETS
MATERIALS
PHYSICAL PROPERTIES
PRASEODYMIUM COMPOUNDS
RARE EARTH COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
360204* - Ceramics
Cermets
& Refractories- Physical Properties