GB931037A - Improvements relating to sintered magnetic alloys - Google Patents
Improvements relating to sintered magnetic alloysInfo
- Publication number
- GB931037A GB931037A GB3901259A GB3901259A GB931037A GB 931037 A GB931037 A GB 931037A GB 3901259 A GB3901259 A GB 3901259A GB 3901259 A GB3901259 A GB 3901259A GB 931037 A GB931037 A GB 931037A
- Authority
- GB
- United Kingdom
- Prior art keywords
- alloy
- powder
- remainder
- liquid phase
- sintered magnetic
- 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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/02—Making ferrous alloys by powder metallurgy
- C22C33/0257—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements
- C22C33/0278—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements with at least one alloying element having a minimum content above 5%
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/02—Making ferrous alloys by powder metallurgy
- C22C33/0207—Using a mixture of prealloyed powders or a master alloy
-
- 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
- H01F1/12—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 soft-magnetic materials
- H01F1/14—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 soft-magnetic materials metals or alloys
- H01F1/20—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 soft-magnetic materials metals or alloys in the form of particles, e.g. powder
- H01F1/22—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 soft-magnetic materials metals or alloys in the form of particles, e.g. powder pressed, sintered, or bound together
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Power Engineering (AREA)
- Soft Magnetic Materials (AREA)
- Powder Metallurgy (AREA)
Abstract
A sintered magnetic alloy comprising 4-9% Al, 6-12% Si, the remainder Fe with optionally up to 3% total additives such as Sb, Be, Ni, Cr, W, Mo, Mg, Mn, V, Ta, Ti, Sn, Zn, B, P, Cu, As, S, Zr, is formed by liquid phase sintering under vacuum or an inert atmosphere such as helium a powder mixture in which not less than 90% of the Al is present as an Al-Si alloy. The preferred powder constituents are Fe Si, Al Si and Fe although powdered sawdust alloy (5-12% Si, 2-10% Al remainder Fe) may also be added to the powder. The Al-Si alloy powder preferably has a composition ranging from 55% Al, 45% Si to 20% Al, 80% Si which allows a sintering range for liquid phase formation of 1000-1300 DEG C. The powders are minus 200 mesh and the powder mixture may be shaped by compaction in a die, rolling into a green strip which is then cut to shape, or by a slip casting technique in which a slurry is formed with polyvinyl alcohol, ammonium alginate and water. The alloy may be used for magnetic transducer heads, transformers, inductors, relays, solenoids and polepieces. U.S.A. Specification 2,193,768 is referred to.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US774159A US2992474A (en) | 1958-11-17 | 1958-11-17 | Magnetic tape recorder heads |
| US774562A US2988806A (en) | 1958-11-17 | 1958-11-17 | Sintered magnetic alloy and methods of production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB931037A true GB931037A (en) | 1963-07-10 |
Family
ID=27118850
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3901259A Expired GB931037A (en) | 1958-11-17 | 1959-11-16 | Improvements relating to sintered magnetic alloys |
Country Status (4)
| Country | Link |
|---|---|
| BE (1) | BE584736A (en) |
| CH (1) | CH440477A (en) |
| DE (1) | DE1408465A1 (en) |
| GB (1) | GB931037A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2176496A (en) * | 1985-06-10 | 1986-12-31 | Sharp Kk | Magnetic head core |
-
1959
- 1959-11-14 DE DE19591408465 patent/DE1408465A1/en active Pending
- 1959-11-16 CH CH8070659A patent/CH440477A/en unknown
- 1959-11-16 GB GB3901259A patent/GB931037A/en not_active Expired
- 1959-11-17 BE BE584736A patent/BE584736A/en unknown
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2176496A (en) * | 1985-06-10 | 1986-12-31 | Sharp Kk | Magnetic head core |
| GB2176496B (en) * | 1985-06-10 | 1989-07-05 | Sharp Kk | Magnetic head core |
Also Published As
| Publication number | Publication date |
|---|---|
| CH440477A (en) | 1967-07-31 |
| BE584736A (en) | 1960-03-16 |
| DE1408465A1 (en) | 1968-10-03 |
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