FR2234385A1 - Air stable cobalt-rare earth magnet particles - coated with metal of M Pt more than 500 degrees centigrade by organometallic decompsn - Google Patents

Air stable cobalt-rare earth magnet particles - coated with metal of M Pt more than 500 degrees centigrade by organometallic decompsn

Info

Publication number
FR2234385A1
FR2234385A1 FR7421575A FR7421575A FR2234385A1 FR 2234385 A1 FR2234385 A1 FR 2234385A1 FR 7421575 A FR7421575 A FR 7421575A FR 7421575 A FR7421575 A FR 7421575A FR 2234385 A1 FR2234385 A1 FR 2234385A1
Authority
FR
France
Prior art keywords
particles
organometallic
metal
decompsn
coated
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.)
Granted
Application number
FR7421575A
Other languages
French (fr)
Other versions
FR2234385B3 (en
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.)
General Electric Co
Original Assignee
General Electric Co
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
Priority claimed from US00372688A external-priority patent/US3856581A/en
Priority claimed from US00372689A external-priority patent/US3853640A/en
Priority claimed from US00372691A external-priority patent/US3856580A/en
Priority claimed from US00372690A external-priority patent/US3856582A/en
Application filed by General Electric Co filed Critical General Electric Co
Publication of FR2234385A1 publication Critical patent/FR2234385A1/en
Application granted granted Critical
Publication of FR2234385B3 publication Critical patent/FR2234385B3/fr
Granted legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
    • C23C16/44—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating
    • C23C16/4417—Methods specially adapted for coating powder
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
    • B22F1/17—Metallic particles coated with metal
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/04—Making non-ferrous alloys by powder metallurgy
    • C22C1/0433—Nickel- or cobalt-based alloys
    • C22C1/0441—Alloys based on intermetallic compounds of the type rare earth - Co, Ni
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/10—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of nickel or cobalt or alloys based thereon
    • 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
    • H01F1/047—Alloys characterised by their composition
    • H01F1/053—Alloys characterised by their composition containing rare earth metals
    • H01F1/055—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
    • H01F1/0551—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 in the form of particles, e.g. rapid quenched powders or ribbon flakes
    • H01F1/0552—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 in the form of particles, e.g. rapid quenched powders or ribbon flakes with a protective layer

Abstract

The particles are initially ground to size =10 mu and mixed with a suitable organometallic cpd. which decomposes at 500 degrees C. and used either as a soln. or slurry. The mixt. is heated in a flowing inert atmos. or a vacuum at 500 degrees C. to form a metal vapour which deposits to form a coherent deposit on the alloy particles. Sufficient organometallic cpd. is used to produce a metal vapour partial press. of >=10-7 atmos. The coating comprises 1-5 wt.% of the product. Pref. the magnet alloy is Co-Sm used in conjunction with Cu acetyl-acetonate. A sintering stage in the mfr. of the magnet is avoided and the aligned particles are compacted into shape in a non-magnetic matrix. Oxidn. of the particles is avoided.
FR7421575A 1973-06-22 1974-06-21 Air stable cobalt-rare earth magnet particles - coated with metal of M Pt more than 500 degrees centigrade by organometallic decompsn Granted FR2234385A1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US00372688A US3856581A (en) 1973-06-22 1973-06-22 Annealing air-stable magnetic materials having superior magnetic characteristics and method
US00372689A US3853640A (en) 1973-06-22 1973-06-22 Lubricants for pressing transition metal-rare earth powder to be sintered
US00372691A US3856580A (en) 1973-06-22 1973-06-22 Air-stable magnetic materials and method
US00372690A US3856582A (en) 1973-06-22 1973-06-22 Fabrication of matrix bonded transition metal-rare earth alloy magnets

Publications (2)

Publication Number Publication Date
FR2234385A1 true FR2234385A1 (en) 1975-01-17
FR2234385B3 FR2234385B3 (en) 1977-04-22

Family

ID=27503095

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7421575A Granted FR2234385A1 (en) 1973-06-22 1974-06-21 Air stable cobalt-rare earth magnet particles - coated with metal of M Pt more than 500 degrees centigrade by organometallic decompsn

Country Status (5)

Country Link
JP (1) JPS5036999A (en)
DE (1) DE2429600A1 (en)
FR (1) FR2234385A1 (en)
IT (1) IT1015238B (en)
NL (1) NL7408372A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0244968A2 (en) * 1986-05-07 1987-11-11 Outokumpu Oy Method for the thermal treatment of sintered metal permanent magnets

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5249500A (en) * 1975-10-18 1977-04-20 Hitachi Maxell Ltd Mnbi alloy magnetic material with excellent oxidation stability
JPS59110775A (en) * 1982-12-13 1984-06-26 Koujiyundo Kagaku Kenkyusho:Kk Formation of metal film
JPS6066896A (en) * 1983-09-16 1985-04-17 インタ−ナショナル　ビジネス　マシ−ンズ　コ−ポレ−ション Method of bonding metal copper on substrate
US4720560A (en) * 1984-10-25 1988-01-19 Morton Thiokol, Inc. Hybrid organometallic compounds, particularly for metal organic chemical vapor deposition
JP2003100509A (en) * 2001-09-27 2003-04-04 Nec Tokin Corp Magnetic core and inductance part using the same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0244968A2 (en) * 1986-05-07 1987-11-11 Outokumpu Oy Method for the thermal treatment of sintered metal permanent magnets
EP0244968A3 (en) * 1986-05-07 1989-01-11 Outokumpu Oy Method for the thermal treatment of sintered metal permanent magnets

Also Published As

Publication number Publication date
IT1015238B (en) 1977-05-10
DE2429600A1 (en) 1975-01-16
NL7408372A (en) 1974-12-24
JPS5036999A (en) 1975-04-07
FR2234385B3 (en) 1977-04-22

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Legal Events

Date Code Title Description
ST Notification of lapse