GB1354996A - Sintered cobalt-rare earth products and method of production - Google Patents
Sintered cobalt-rare earth products and method of productionInfo
- Publication number
- GB1354996A GB1354996A GB3806772A GB3806772A GB1354996A GB 1354996 A GB1354996 A GB 1354996A GB 3806772 A GB3806772 A GB 3806772A GB 3806772 A GB3806772 A GB 3806772A GB 1354996 A GB1354996 A GB 1354996A
- Authority
- GB
- United Kingdom
- Prior art keywords
- rare earth
- sintered
- hydride
- powder
- sintered magnet
- 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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/0433—Nickel- or cobalt-based alloys
- C22C1/0441—Alloys based on intermetallic compounds of the type rare earth - Co, Ni
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Crystallography & Structural Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Power Engineering (AREA)
- Hard Magnetic Materials (AREA)
- Powder Metallurgy (AREA)
Abstract
1354996 Sintered cobalt-rare earth magnets GENERAL ELECTRIC CO 15 Aug 1972 [11 Nov 1971] 38067/72 Heading C7D Sintered CO 5 R type magnets are made by compacting and sintering at 950‹-1200‹C. in an inert atmosphere or a vacuum or powder mixture of sub or stoichiometric CO 5 R and 0À5-6 wt. per cent of a rare earth metal or rare earth metal hydride where R is a rare earth of the lanthanide series, atomic number 57-71 or yttrium. The preferred rare earth is samarium and the sintered magnet contains 36À5-39% rare earth. The sub or stoichiometric powder size should be 1-10 microns and the rare earth or hydride powder size should be coarser e.g. 5-150 microns. The sintered magnet has a density of at least 86% theoretical and a higher intrinsic coercive force. Alternatively a green compact of Co 5 R powder may be impregnated with the molten rare earth or hydride and then sintered. The sintered magnet may be crushed and bonded with plastics, rubber Pb, Sn, Zn, Cu or Al and cast, pressed or extruded.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US19797771A | 1971-11-11 | 1971-11-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1354996A true GB1354996A (en) | 1974-06-05 |
Family
ID=22731502
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3806772A Expired GB1354996A (en) | 1971-11-11 | 1972-08-15 | Sintered cobalt-rare earth products and method of production |
Country Status (7)
| Country | Link |
|---|---|
| JP (1) | JPS4855398A (en) |
| CA (1) | CA976001A (en) |
| DE (1) | DE2254574A1 (en) |
| FR (1) | FR2159420B1 (en) |
| GB (1) | GB1354996A (en) |
| IT (1) | IT970387B (en) |
| NL (1) | NL7214174A (en) |
-
1972
- 1972-08-15 GB GB3806772A patent/GB1354996A/en not_active Expired
- 1972-10-19 NL NL7214174A patent/NL7214174A/xx not_active Application Discontinuation
- 1972-11-08 DE DE19722254574 patent/DE2254574A1/en not_active Withdrawn
- 1972-11-09 FR FR7239744A patent/FR2159420B1/fr not_active Expired
- 1972-11-10 JP JP47112233A patent/JPS4855398A/ja active Pending
- 1972-11-10 IT IT3151572A patent/IT970387B/en active
- 1972-11-14 CA CA156,702A patent/CA976001A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR2159420A1 (en) | 1973-06-22 |
| JPS4855398A (en) | 1973-08-03 |
| FR2159420B1 (en) | 1978-09-01 |
| CA976001A (en) | 1975-10-14 |
| NL7214174A (en) | 1973-05-15 |
| DE2254574A1 (en) | 1973-05-17 |
| IT970387B (en) | 1974-04-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |