GB1318965A - Rare earth intermetallic compounds by a reduction-diffusion process - Google Patents

Rare earth intermetallic compounds by a reduction-diffusion process

Info

Publication number
GB1318965A
GB1318965A GB3819770A GB3819770A GB1318965A GB 1318965 A GB1318965 A GB 1318965A GB 3819770 A GB3819770 A GB 3819770A GB 3819770 A GB3819770 A GB 3819770A GB 1318965 A GB1318965 A GB 1318965A
Authority
GB
United Kingdom
Prior art keywords
rare
heating
oxide
intermetallic compounds
calcium hydride
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
GB3819770A
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
Application filed by General Electric Co filed Critical General Electric Co
Publication of GB1318965A publication Critical patent/GB1318965A/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
    • 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
    • H01F1/0553—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 obtained by reduction or by hydrogen decrepitation or embrittlement
    • 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
    • B22F9/00—Making metallic powder or suspensions thereof
    • B22F9/16—Making metallic powder or suspensions thereof using chemical processes
    • B22F9/18—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds
    • B22F9/20—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds starting from solid metal compounds
    • 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

Abstract

1318965 Rare-earth intermetallic compounds GENERAL ELECTRIC CO 7 Aug 1970 [13 Aug 1969] 38197/70 Heading C1A [Also in Divisions C7 and H1] Rare earth intermetallic compounds are obtained by heating a particulate mixture of a rare-earth metal oxide, calcium hydride and Co, Fe, Mn/Co/Fe alloys, Co/Fe alloys, mixtures of Co and Fe, Co/Mn alloys, Co/Mn mixtures or mixtures of Fe/Co/Mn, to effect reduction of the oxide and then heating to diffuse the resulting rare-earth metal into the other metal. Alternatively the oxide may be pre-reduced by heating with calcium hydride to at least 850‹ C. and the product heated with the other metals to give the intermetallic compound. Further alternatively the rare-earth metal oxide, and the metal or alloy in the form of its oxide are heated with sufficient calcium hydride to reduce all the oxides followed by heating to diffuse the resulting metals together. The calcium hydride may may be present in excess or formed in situ by heating a calcium compound in a reducing atmosphere.
GB3819770A 1969-08-13 1970-08-07 Rare earth intermetallic compounds by a reduction-diffusion process Expired GB1318965A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US84987569A 1969-08-13 1969-08-13

Publications (1)

Publication Number Publication Date
GB1318965A true GB1318965A (en) 1973-05-31

Family

ID=25306730

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3819770A Expired GB1318965A (en) 1969-08-13 1970-08-07 Rare earth intermetallic compounds by a reduction-diffusion process

Country Status (5)

Country Link
JP (1) JPS497296B1 (en)
DE (1) DE2039972C3 (en)
FR (1) FR2058256B1 (en)
GB (1) GB1318965A (en)
NL (1) NL166725C (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014187867A1 (en) * 2013-05-21 2014-11-27 Höganäs Ab Process for manufacturing metal containing powder
US10611638B2 (en) 2014-03-21 2020-04-07 Höganäs Ab (Publ) Process for manufacturing a metal carbide, nitride, boride, or silicide in powder form
CN111163885A (en) * 2018-08-31 2020-05-15 株式会社Lg化学 Method for producing magnetic material and magnetic material

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4767450A (en) * 1984-11-27 1988-08-30 Sumitomo Special Metals Co., Ltd. Process for producing the rare earth alloy powders
US4769063A (en) * 1986-03-06 1988-09-06 Sumitomo Special Metals Co., Ltd. Method for producing rare earth alloy
US5354354A (en) * 1991-10-22 1994-10-11 Th. Goldschmidt Ag Method for producing single-phase, incongruently melting intermetallic phases

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014187867A1 (en) * 2013-05-21 2014-11-27 Höganäs Ab Process for manufacturing metal containing powder
CN105392734A (en) * 2013-05-21 2016-03-09 霍加纳斯股份有限公司 Process for manufacturing metal containing powder
US10611638B2 (en) 2014-03-21 2020-04-07 Höganäs Ab (Publ) Process for manufacturing a metal carbide, nitride, boride, or silicide in powder form
CN111163885A (en) * 2018-08-31 2020-05-15 株式会社Lg化学 Method for producing magnetic material and magnetic material
EP3650148A4 (en) * 2018-08-31 2020-05-20 LG Chem, Ltd. Method for preparing magnetic powder and magnetic powder
US11365464B2 (en) 2018-08-31 2022-06-21 Lg Chem, Ltd. Method for preparing magnetic powder and magnetic material

Also Published As

Publication number Publication date
FR2058256B1 (en) 1973-11-23
NL7012000A (en) 1971-02-16
DE2039972B2 (en) 1977-12-22
JPS497296B1 (en) 1974-02-19
FR2058256A1 (en) 1971-05-28
NL166725C (en) 1981-09-15
DE2039972A1 (en) 1971-02-25
DE2039972C3 (en) 1978-08-17

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee