GB942092A - Improvements in or relating to permanent magnets and their manufacture - Google Patents
Improvements in or relating to permanent magnets and their manufactureInfo
- Publication number
- GB942092A GB942092A GB22564/61A GB2256461A GB942092A GB 942092 A GB942092 A GB 942092A GB 22564/61 A GB22564/61 A GB 22564/61A GB 2256461 A GB2256461 A GB 2256461A GB 942092 A GB942092 A GB 942092A
- Authority
- GB
- United Kingdom
- Prior art keywords
- alloy
- tube
- induction coil
- passed
- zone
- 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
-
- C—CHEMISTRY; METALLURGY
- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B13/00—Single-crystal growth by zone-melting; Refining by zone-melting
-
- C—CHEMISTRY; METALLURGY
- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B29/00—Single crystals or homogeneous polycrystalline material with defined structure characterised by the material or by their shape
- C30B29/10—Inorganic compounds or compositions
- C30B29/52—Alloys
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Power Engineering (AREA)
- Manufacturing Cores, Coils, And Magnets (AREA)
- Hard Magnetic Materials (AREA)
Abstract
942,092. Zone - melting a magnetic alloy. DARWINS Ltd., and ENGLISH STEEL CORPORATION Ltd. Sept. 20, 1962 [June 22, 1961 ; July 1, 1961], Nos. 22564/61 and 23830/61. Heading B1S. A permanent magnet is formed from an ironnickel -aluminium-cobalt alloy which has been given a columnar crystal structure by zone-melting in an elongated tube of fused silica with the aid of induction heating. The alloy may contain 10-30% of nickel, 6- 11% of aluminium, 8- 40% of cobalt, 0À5-8% of copper, and 0À5- 3À25% of niobium, and small amounts of titanium, silicon, sulphur, zirconium, and tantalum, the balance being iron. In the case of a liquid-solid recrystallization interface of 1420-1430 ‹C, the molten zone may be heated to 1600 ‹C. and the temperature drop in the first cm. from the interface may be 200 ‹C. Cooling may be effected by playing water or air on the silica tube below the induction coil. The alloy may be fed into a preformed tube as a precast or sintered rod or as a powder. The tube may be formed in situ from a dipped rod (Fig. 2, not shown). The alloy may be passed continuously through a stationary induction coil and cut up into lengths or may be passed through as successive charges separated by a thin layer of refractory. The tube may be passed through the induction coil together with the alloy (Fig. 4, not shown) or may be reciprocated or maintained stationary. As shown in Fig. 1, a precast alloy rod 1 is passed downwards together with a tube 2 through an induction coil 4, the bottom turn of which surrounds a graphite tube 5. Cooling is effected by a water spray ring 7. Specifications 634,686, 634,700, 652,022 and 661,727 are referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB22564/61A GB942092A (en) | 1961-06-22 | 1961-06-22 | Improvements in or relating to permanent magnets and their manufacture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB22564/61A GB942092A (en) | 1961-06-22 | 1961-06-22 | Improvements in or relating to permanent magnets and their manufacture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB942092A true GB942092A (en) | 1963-11-20 |
Family
ID=10181467
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB22564/61A Expired GB942092A (en) | 1961-06-22 | 1961-06-22 | Improvements in or relating to permanent magnets and their manufacture |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB942092A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101966576A (en) * | 2010-09-10 | 2011-02-09 | 中国科学院宁波材料技术与工程研究所 | Directional solidifying crystallization method of metal alloy magnet and device for implementing same |
| CN109082603A (en) * | 2018-08-17 | 2018-12-25 | 杭州红山磁性材料有限公司 | A kind of alnico and preparation method thereof |
-
1961
- 1961-06-22 GB GB22564/61A patent/GB942092A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101966576A (en) * | 2010-09-10 | 2011-02-09 | 中国科学院宁波材料技术与工程研究所 | Directional solidifying crystallization method of metal alloy magnet and device for implementing same |
| CN109082603A (en) * | 2018-08-17 | 2018-12-25 | 杭州红山磁性材料有限公司 | A kind of alnico and preparation method thereof |
| CN109082603B (en) * | 2018-08-17 | 2020-02-11 | 杭州红山磁性材料有限公司 | Alnico permanent magnetic alloy and preparation method thereof |
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