GB1067054A - Improvements in the heat treatment of platinum-cobalt magnets - Google Patents
Improvements in the heat treatment of platinum-cobalt magnetsInfo
- Publication number
- GB1067054A GB1067054A GB2029265A GB2029265A GB1067054A GB 1067054 A GB1067054 A GB 1067054A GB 2029265 A GB2029265 A GB 2029265A GB 2029265 A GB2029265 A GB 2029265A GB 1067054 A GB1067054 A GB 1067054A
- Authority
- GB
- United Kingdom
- Prior art keywords
- hydrogen
- platinum
- alloys
- hour
- hours
- 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
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C5/00—Alloys based on noble metals
Abstract
Magnetic alloys containing 19.8-31.2% by weight of cobalt, the balance being platinum are given a disordering treatment at a temperature above 900 DEG C for between 1/2 and 1 hour and are then cooled to a temperature between 630 DEG and 750 DEG C at a rate between 50 DEG and 150 DEG C per minute measured at 750 DEG C, followed by quenching to room temperature. The alloys are then aged in the range 630-700 DEG C for a period between 5 minutes and 2 hours, and again quenched to room temperature. The alloys may be made by vacuum melting or by a powder metallurgical method. In a preferred embodiment of the latter powders of the pure metals (100 BSS mesh) are mixed and pressed hydrostatically at 20 tons/sq. in. The compact is presintered in hydrogen at 800 DEG C for 1/2 to 1 hour and is then sintered in hydrogen at 1300 DEG to 1350 DEG C for 17 hours, after which the alloy cooled and mechanically worked in hydrogen at 1200 DEG C e.g. by swaging or hammering, preferably to achieve a reduction in area of at least 30%.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2029265A GB1067054A (en) | 1965-05-13 | 1965-05-13 | Improvements in the heat treatment of platinum-cobalt magnets |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2029265A GB1067054A (en) | 1965-05-13 | 1965-05-13 | Improvements in the heat treatment of platinum-cobalt magnets |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1067054A true GB1067054A (en) | 1967-04-26 |
Family
ID=10143566
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2029265A Expired GB1067054A (en) | 1965-05-13 | 1965-05-13 | Improvements in the heat treatment of platinum-cobalt magnets |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1067054A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20100069847A1 (en) * | 2005-10-05 | 2010-03-18 | Larose Jeffrey A | Axial Flow-Pump With Multi-Grooved Rotor |
US7699586B2 (en) | 2004-12-03 | 2010-04-20 | Heartware, Inc. | Wide blade, axial flow pump |
US7972122B2 (en) | 2005-04-29 | 2011-07-05 | Heartware, Inc. | Multiple rotor, wide blade, axial flow pump |
US8852072B2 (en) | 2008-02-08 | 2014-10-07 | Heartware, Inc. | Ventricular assist device for intraventricular placement |
WO2018064437A1 (en) * | 2016-09-29 | 2018-04-05 | Heartware, Inc. | Implantable pump impeller thermal knockdown |
-
1965
- 1965-05-13 GB GB2029265A patent/GB1067054A/en not_active Expired
Cited By (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7699586B2 (en) | 2004-12-03 | 2010-04-20 | Heartware, Inc. | Wide blade, axial flow pump |
US8007254B2 (en) | 2004-12-03 | 2011-08-30 | Heartware, Inc. | Axial flow pump with multi-grooved rotor |
US8668473B2 (en) | 2004-12-03 | 2014-03-11 | Heartware, Inc. | Axial flow pump with multi-grooved rotor |
US9956332B2 (en) | 2004-12-03 | 2018-05-01 | Heartware, Inc. | Axial flow pump with multi-grooved rotor |
US7972122B2 (en) | 2005-04-29 | 2011-07-05 | Heartware, Inc. | Multiple rotor, wide blade, axial flow pump |
US9737652B2 (en) | 2005-10-05 | 2017-08-22 | Heartware, Inc. | Axial flow pump with multi-grooved rotor |
US8419609B2 (en) | 2005-10-05 | 2013-04-16 | Heartware Inc. | Impeller for a rotary ventricular assist device |
US8790236B2 (en) * | 2005-10-05 | 2014-07-29 | Heartware, Inc. | Axial flow-pump with multi-grooved rotor |
US10251985B2 (en) | 2005-10-05 | 2019-04-09 | Heartware, Inc. | Axial flow pump with multi-grooved rotor |
US20100069847A1 (en) * | 2005-10-05 | 2010-03-18 | Larose Jeffrey A | Axial Flow-Pump With Multi-Grooved Rotor |
US9339598B2 (en) | 2005-10-05 | 2016-05-17 | Heartware, Inc. | Axial flow pump with multi-grooved rotor |
US9173984B2 (en) | 2008-02-08 | 2015-11-03 | Heartware, Inc. | Ventricular assist device for intraventricular placement |
US9956333B2 (en) | 2008-02-08 | 2018-05-01 | Heartware, Inc. | Ventricular assist device for intraventricular placement |
US9579437B2 (en) | 2008-02-08 | 2017-02-28 | Medtronic HeartWare, Inc. | Ventricular assist device for intraventricular placement |
US8852072B2 (en) | 2008-02-08 | 2014-10-07 | Heartware, Inc. | Ventricular assist device for intraventricular placement |
WO2018064437A1 (en) * | 2016-09-29 | 2018-04-05 | Heartware, Inc. | Implantable pump impeller thermal knockdown |
CN109789256A (en) * | 2016-09-29 | 2019-05-21 | 心脏器械股份有限公司 | The thermal shock of implantable pump impeller falls |
US10744247B2 (en) * | 2016-09-29 | 2020-08-18 | Heartware, Inc. | Implantable pump impeller thermal knockdown |
CN109789256B (en) * | 2016-09-29 | 2021-08-03 | 心脏器械股份有限公司 | Thermal shock of implantable pump impeller |
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