GB849505A - Improvements in and relating to platinum-base magnet alloys - Google Patents

Improvements in and relating to platinum-base magnet alloys

Info

Publication number
GB849505A
GB849505A GB378458A GB378458A GB849505A GB 849505 A GB849505 A GB 849505A GB 378458 A GB378458 A GB 378458A GB 378458 A GB378458 A GB 378458A GB 849505 A GB849505 A GB 849505A
Authority
GB
United Kingdom
Prior art keywords
alloy
platinum
temperature
quenching
relating
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
GB378458A
Inventor
Jack Chambers Chaston
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.)
Johnson Matthey PLC
Original Assignee
Johnson Matthey PLC
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 Johnson Matthey PLC filed Critical Johnson Matthey PLC
Priority to GB378458A priority Critical patent/GB849505A/en
Publication of GB849505A publication Critical patent/GB849505A/en
Expired legal-status Critical Current

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

A method of heat treating a cobalt-platinum alloy containing 17-27% cobalt, the remainder being platinum and unavoidable impurities comprises heating the alloy to a temperature sufficient to effect disordering within the alloy, quenching the alloy to a temperature between 550 DEG C. and 750 DEG C., maintaining the alloy at the latter temperature for a predetermined time, and finally quenching the alloy in water or cooling it in air. The quenching at 550-750 DEG C. may be carried out in a salt bath for 5 hours to 1/4 hour, and the disordering temperature may be 850-1000 DEG C. The alloy may also contain up to 1% each of nickel, iron and/or titanium. The material treated by the invention is stated to be suitable for the production of permanent magnets of high energy and coercive force.
GB378458A 1958-02-05 1958-02-05 Improvements in and relating to platinum-base magnet alloys Expired GB849505A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB378458A GB849505A (en) 1958-02-05 1958-02-05 Improvements in and relating to platinum-base magnet alloys

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB378458A GB849505A (en) 1958-02-05 1958-02-05 Improvements in and relating to platinum-base magnet alloys

Publications (1)

Publication Number Publication Date
GB849505A true GB849505A (en) 1960-09-28

Family

ID=9764854

Family Applications (1)

Application Number Title Priority Date Filing Date
GB378458A Expired GB849505A (en) 1958-02-05 1958-02-05 Improvements in and relating to platinum-base magnet alloys

Country Status (1)

Country Link
GB (1) GB849505A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0087559A1 (en) * 1982-02-26 1983-09-07 Hitachi, Ltd. Thin-film permanent magnet
EP1724366A2 (en) * 2004-10-12 2006-11-22 Heraeus, Inc. Low oxygen content alloy compositions

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0087559A1 (en) * 1982-02-26 1983-09-07 Hitachi, Ltd. Thin-film permanent magnet
EP1724366A2 (en) * 2004-10-12 2006-11-22 Heraeus, Inc. Low oxygen content alloy compositions
EP1724366A3 (en) * 2004-10-12 2010-02-17 Heraeus, Inc. Low oxygen content alloy compositions

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