GB1067054A - Improvements in the heat treatment of platinum-cobalt magnets - Google Patents

Improvements in the heat treatment of platinum-cobalt magnets

Info

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
Application number
GB2029265A
Inventor
Hamish Carmichael Angus
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Inco Ltd
Original Assignee
Inco Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Inco Ltd filed Critical Inco Ltd
Priority to GB2029265A priority Critical patent/GB1067054A/en
Publication of GB1067054A publication Critical patent/GB1067054A/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/032Magnets 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
    • H01F1/04Magnets 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
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C5/00Alloys 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%.
GB2029265A 1965-05-13 1965-05-13 Improvements in the heat treatment of platinum-cobalt magnets Expired GB1067054A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (19)

* Cited by examiner, † Cited by third party
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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