GB1392915A - Method of manufacturing permanent magnets from a cast cobalt samarium alloy - Google Patents
Method of manufacturing permanent magnets from a cast cobalt samarium alloyInfo
- Publication number
- GB1392915A GB1392915A GB1877873A GB1877873A GB1392915A GB 1392915 A GB1392915 A GB 1392915A GB 1877873 A GB1877873 A GB 1877873A GB 1877873 A GB1877873 A GB 1877873A GB 1392915 A GB1392915 A GB 1392915A
- Authority
- GB
- United Kingdom
- Prior art keywords
- alloy
- compact
- annealing
- permanent magnets
- presintering
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
- H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
- H01F1/047—Alloys characterised by their composition
- H01F1/053—Alloys characterised by their composition containing rare earth metals
- H01F1/055—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
- H01F1/0555—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 pressed, sintered or bonded together
- H01F1/0557—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 pressed, sintered or bonded together sintered
Landscapes
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Hard Magnetic Materials (AREA)
- Powder Metallurgy (AREA)
Abstract
1392915 Sintered samarium-cobalt permanent magnets SOC D'ETUDES ET DE RECHERCHES MAGNETIQUES 18 April 1973 [2 May 1972] 18778/73 Heading C7D Sintered Sm-Co magnets such as SmCO 5 and Sm 2 CO 7 are produced by compacting the powdered alloy in a magnetic field presintering the compact at 600-1000‹C, sintering e.g. at 1050-1150‹C, annealing e.g. at 900‹C for 5-48 hours and then quenching the compact e.g. in water, from the annealing temperature and this increases the coercivity of the magnet. The Sm-CO alloy preferably contains 34-42% Sm and is produced by heating Co to 1500‹C, cooling to 1100‹C and adding the Sm. The alloy is crushed to 4 micron and may be mixed with a lubricant prior to compacting at 2T/cm2 in a magnetic field of 10-15K oersteds parallel to the direction of pressing. Presintering, sintering and annealing are carried out under He or A and prior to presintering and annealing the compact is coated with a Sm alloy having a higher melting point than the alloy compact.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7215499A FR2182635B1 (en) | 1972-05-02 | 1972-05-02 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1392915A true GB1392915A (en) | 1975-05-07 |
Family
ID=9097820
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1877873A Expired GB1392915A (en) | 1972-05-02 | 1973-04-18 | Method of manufacturing permanent magnets from a cast cobalt samarium alloy |
Country Status (7)
Country | Link |
---|---|
US (1) | US3844851A (en) |
CH (1) | CH573653A5 (en) |
DE (1) | DE2320122C2 (en) |
FR (1) | FR2182635B1 (en) |
GB (1) | GB1392915A (en) |
IT (1) | IT993556B (en) |
NL (1) | NL182847C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104851543A (en) * | 2015-05-21 | 2015-08-19 | 唐海峰 | Preparing method of anticorrosion samarium cobalt-based permanent magnet material |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2295130A1 (en) * | 1974-08-27 | 1976-07-16 | Aimants Ugimag Sa | COMPOSITION FOR PERMANENT MAGNETS OF THE "RARE-EARTH - TRANSITION METALS" FAMILY AND METHOD OF MANUFACTURING SUCH A MAGNET |
US7338566B2 (en) * | 2001-11-09 | 2008-03-04 | Santoku Corporation | Alloy for sm-co based magnet, method for production thereof, sintered magnet and bonded magnet |
CN114597043A (en) * | 2022-02-11 | 2022-06-07 | 杭州智宇磁业科技有限公司 | Preparation method of cerium-containing samarium cobalt permanent magnet material |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL6700998A (en) * | 1967-01-21 | 1968-07-22 | ||
CH515763A (en) * | 1969-07-10 | 1971-11-30 | Bbc Brown Boveri & Cie | Process for the production of permanent magnets |
GB1347764A (en) * | 1970-04-30 | 1974-02-27 | Gen Electric | Heat-aged sintered cobalt-rare earth intermetallic product and process |
DE2142110B2 (en) * | 1970-08-27 | 1976-06-24 | N.V. Philips' Gloeilampenfabrieken, Eindhoven (Niederlande) | PROCESS FOR MAKING A BODY WITH ANISOTROPIC PERMANENT MAGNETIC PROPERTIES FROM A CO DEEP 5 R COMPOUND |
US3684593A (en) * | 1970-11-02 | 1972-08-15 | Gen Electric | Heat-aged sintered cobalt-rare earth intermetallic product and process |
FR2120303A5 (en) * | 1970-12-29 | 1972-08-18 | Etu Rech Magnetiqu | |
US3755007A (en) * | 1971-04-01 | 1973-08-28 | Gen Electric | Stabilized permanent magnet comprising a sintered and quenched body of compacted cobalt-rare earth particles |
US3748193A (en) * | 1971-08-16 | 1973-07-24 | Gen Electric | Rare earth intermetallic compounds by a calcium hydride reduction diffusion process |
-
1972
- 1972-05-02 FR FR7215499A patent/FR2182635B1/fr not_active Expired
-
1973
- 1973-04-10 CH CH516173A patent/CH573653A5/xx not_active IP Right Cessation
- 1973-04-18 GB GB1877873A patent/GB1392915A/en not_active Expired
- 1973-04-19 US US00352695A patent/US3844851A/en not_active Expired - Lifetime
- 1973-04-19 DE DE2320122A patent/DE2320122C2/en not_active Expired
- 1973-04-27 NL NLAANVRAGE7305987,A patent/NL182847C/en not_active IP Right Cessation
- 1973-05-02 IT IT23609/73A patent/IT993556B/en active
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104851543A (en) * | 2015-05-21 | 2015-08-19 | 唐海峰 | Preparing method of anticorrosion samarium cobalt-based permanent magnet material |
Also Published As
Publication number | Publication date |
---|---|
NL182847B (en) | 1987-12-16 |
CH573653A5 (en) | 1976-03-15 |
DE2320122A1 (en) | 1973-11-22 |
NL182847C (en) | 1988-05-16 |
DE2320122C2 (en) | 1983-09-29 |
NL7305987A (en) | 1973-11-06 |
FR2182635A1 (en) | 1973-12-14 |
IT993556B (en) | 1975-09-30 |
US3844851A (en) | 1974-10-29 |
FR2182635B1 (en) | 1978-03-03 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PCNP | Patent ceased through non-payment of renewal fee |