Published 1998 | Version v1
Miscellaneous Metadata-only

Coercivity mechanisms in SmCo5 magnets

Creators

  • 1. Sao Paulo Univ. (Brazil). Dept. Metalurgia e Materiais
  • 2. Inst. de Pesquisas Tecnologicas do Estado de Sao Paulo S.A., Sao Paulo, S.P. (Brazil)
  • 3. Inst. de Fisica, Univ. de Sao Paulo, Sao Paulo, S.P. (Brazil)
  • 4. Dept. Engenharia Quimica, Escola Politecnica, Univ. de Sao Paulo, Sao Paulo, S.P. (Brazil)

Description

The effect of chemical composition and heat treatment on the coercivity of SmCo5 sintered magnets has been studied using a series of six alloys with composition near to that of stoichiometric SmCo5. The great increase of coercivity for heat treatments around 850 C occurs with negligible change in the SmCo5 lattice parameters or anisotropy field. The anisotropy field of SmCo5 was redetermined from measurements in dc magnetic fields up to 33 T. It was found that HA is around 50-55 T, considerably higher than previously reported values, and this value is practically unaffected by chemical composition or heat treatments. The Co-rich section of the Sm-Co phase diagram is redrawn, based on lattice parameter data, metallographic observation of the samples, and differential thermal analysis (DTA). The Sm5Co19 phase is added to the phase diagram as a stable phase. (orig.)

Part of:
Rare-earth magnets and their applications. Vol. 1. Proceedings

Additional details

Publishing Information

ISBN
3-88355-264-X
Imprint Title
Rare-earth magnets and their applications. Vol. 1. Proceedings
Imprint Pagination
604 p.
Journal Page Range
p. 127-136

Conference

Title
15. international workshop on rare-earth magnets and their applications (REM-15); 10. international symposium on magnetic anisotropy and coercivity in rare-earth transition metal alloys, and exhibition
Dates
30 Aug - 4 Sep 1998
Place
Dresden (Germany)

INIS

Country of Publication
Germany
Country of Input or Organization
Germany
INIS RN
31018665
Subject category
S36: MATERIALS SCIENCE;
Resource subtype / Literary indicator
Conference, Non-conventional Literature
Descriptors DEI
ANISOTROPY; ANNEALING; COBALT ALLOYS; COERCIVE FORCE; DIFFERENTIAL THERMAL ANALYSIS; FERROMAGNETIC MATERIALS; LATTICE PARAMETERS; PERMANENT MAGNETS; PHASE DIAGRAMS; SAMARIUM ALLOYS; SINTERING
Descriptors DEC
ALLOYS; DIAGRAMS; EQUIPMENT; FABRICATION; HEAT TREATMENTS; INFORMATION; MAGNETIC MATERIALS; MAGNETS; MATERIALS; RARE EARTH ALLOYS; THERMAL ANALYSIS; TRANSITION ELEMENT ALLOYS

Optional Information

Notes
17 refs.