SU549266A1 - A method of manufacturing sintered permanent magnets based on compounds of rare earth metals with cobalt - Google Patents

A method of manufacturing sintered permanent magnets based on compounds of rare earth metals with cobalt

Info

Publication number
SU549266A1
SU549266A1 SU2167847A SU2167847A SU549266A1 SU 549266 A1 SU549266 A1 SU 549266A1 SU 2167847 A SU2167847 A SU 2167847A SU 2167847 A SU2167847 A SU 2167847A SU 549266 A1 SU549266 A1 SU 549266A1
Authority
SU
USSR - Soviet Union
Prior art keywords
cobalt
permanent magnets
rare earth
earth metals
compounds
Prior art date
Application number
SU2167847A
Other languages
Russian (ru)
Inventor
Геннадий Михайлович Федичкин
Даниил Васильевич Игнатов
Владимир Сергеевич Балихин
Станислав Наумович Гладышев
Original Assignee
Институт металлургии им.А.А.Байкова АН СССР
Московский Институт Электронного Машиностроения Мв И Ссо Рсфср
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 Институт металлургии им.А.А.Байкова АН СССР, Московский Институт Электронного Машиностроения Мв И Ссо Рсфср filed Critical Институт металлургии им.А.А.Байкова АН СССР
Priority to SU2167847A priority Critical patent/SU549266A1/en
Application granted granted Critical
Publication of SU549266A1 publication Critical patent/SU549266A1/en

Links

Landscapes

  • Hard Magnetic Materials (AREA)
  • Powder Metallurgy (AREA)

Description

Изобретение относитс  к порошковой металлургии , в частности к производству посто нных магнитов на основе соединений редкоземельных металлов с кобальтом.The invention relates to powder metallurgy, in particular, to the production of permanent magnets based on compounds of rare earth metals with cobalt.

Известен способ изготовлени  посто нных магнитов из соединени  SmCos, включающий спекание и охлаждение от температуры спекани  до комнатной в вакууме или защитной атмосфере 1.A known method of making permanent magnets from an SmCos compound includes sintering and cooling from sintering temperature to room temperature in a vacuum or protective atmosphere 1.

Недостатком известного способа  вл етс  необходимость применени  герметичных систем в св зи с высокой окислительной способностью соединений редкоземельных металлов с кобальтом.A disadvantage of the known method is the necessity of using hermetic systems in connection with the high oxidizing ability of rare-earth metal compounds with cobalt.

Наиболее близким по технической сущности и достигаемому эффекту  вл етс  способ изготовлени  посто нных магнитов на основе соединений редкоземельных металлов с кобальтом , включающий спекание и охлаждение в инертной атмосфере от температуры спекани  до 800-900° С, выдержку при этой температуре и охлаждение до комнатной температуры 2.The closest in technical essence and the achieved effect is a method of producing permanent magnets based on rare earth metals with cobalt, including sintering and cooling in an inert atmosphere from sintering temperature to 800-900 ° C, holding at this temperature and cooling to room temperature 2 .

Недостатком известного способа изготовлени   вл етс  необходимость применепи  герметичных систем и низка  воспроизводи мость свойств магнитов, изготовленных этим способом.A disadvantage of the known method of manufacture is the need to apply hermetic systems and the reproducibility of the properties of the magnets produced by this method is low.

Целью изобретени   вл етс  упрощение режима термической обработки и улучшениеThe aim of the invention is to simplify the mode of heat treatment and improve

воспроизводимости свойств посто нных магнитов .reproducibility properties of permanent magnets.

Дл  достижени  этой цели предложен способ изготовлени  спеченных посто нных магПИТОВ на основе соединений редкоземельных металлов с кобальтом, отличающийс  от известного тем, что спеченные заготовки подвергают алитированию, & термическую обработку провод т на воздухе.To achieve this goal, a method has been proposed for the manufacture of sintered permanent magPITs based on rare earth metals with cobalt, which differs from the known fact that the sintered blanks are subjected to aluminizing, & heat treatment is carried out in air.

Нредложенный способ осуществл ют следующим образом.The foregoing method is carried out as follows.

На поверхности спеченных при И 20° С 1 час в вакууме 10 мм рт. ст. Sm-Со магнитов создают защитный слой путем электролитического алитировани  в расплаве солей 35% NaCl - 15% NaF - 35% KCl - 15% А1Рз при плотности тока 0,3 Л/сж и температуре 800°С в течение 10-15 мин. В качестве растворимого анода используют металлический алюминий, катодом служит магнит , укрепленный на молибденовой подвеске. Алитированные магниты на воздухе нагревают до 1100° С 20 мин, охлаждают до 900° С в течение часа, выдерживают 3 часа и охлаждают в CTipye воздуха.On the surface of sintered at And 20 ° C 1 hour in vacuum 10 mm Hg. Art. Sm-С magnets create a protective layer by electrolytic aliasing of 35% NaCl - 15% NaF - 35% KCl - 15% A1Pz in the molten salt at a current density of 0.3 L / s and a temperature of 800 ° C for 10-15 minutes. Metallic aluminum is used as a soluble anode; a magnet mounted on a molybdenum suspension serves as the cathode. The altered magnets in air are heated to 1100 ° C for 20 minutes, cooled to 900 ° C for one hour, kept for 3 hours and cooled in CTipye air.

Предложенным способом была изготовлена сери  магнитов, при этом все магниты имели следующие свойства:The proposed method was made a series of magnets, with all the magnets had the following properties:

Остаточна  индукци  Вг, Гс 8900-9100Residual induction Br, Gs 8900-9100

Коэрцитивна  сила ьИс, Э 8700-8800Coercive force, E 8700-8800

Коэрцитивна  сила Нс, Э Больше 26000 Критическое поле Яд, Э 17000-18000 Максимальна  магнитна Coercive force Ns, E More than 26000 Critical field Poison, E 17000-18000 Maximum magnetic

энерги  (ВН) max. Гс . Э (19,5-20) . Ю.energy (HV) max. Gs. E (19.5-20). YU.

,.,-.-,;., -.- ,;

Claims (2)

1.Das D., IEEE Traus, 1969, v. Mag -5, № 3, с. 214.1.Das D., IEEE Traus, 1969, v. Mag -5, No. 3, p. 214. 2.Патент США Л 3,648,593, 148/102. 1972.2. US Patent L 3,648,593, 148/102. 1972.
SU2167847A 1975-08-21 1975-08-21 A method of manufacturing sintered permanent magnets based on compounds of rare earth metals with cobalt SU549266A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU2167847A SU549266A1 (en) 1975-08-21 1975-08-21 A method of manufacturing sintered permanent magnets based on compounds of rare earth metals with cobalt

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU2167847A SU549266A1 (en) 1975-08-21 1975-08-21 A method of manufacturing sintered permanent magnets based on compounds of rare earth metals with cobalt

Publications (1)

Publication Number Publication Date
SU549266A1 true SU549266A1 (en) 1977-03-05

Family

ID=20630320

Family Applications (1)

Application Number Title Priority Date Filing Date
SU2167847A SU549266A1 (en) 1975-08-21 1975-08-21 A method of manufacturing sintered permanent magnets based on compounds of rare earth metals with cobalt

Country Status (1)

Country Link
SU (1) SU549266A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0794268A1 (en) * 1996-03-06 1997-09-10 Vacuumschmelze GmbH Process for improving corrosion protection of aluminium coated surfaces

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0794268A1 (en) * 1996-03-06 1997-09-10 Vacuumschmelze GmbH Process for improving corrosion protection of aluminium coated surfaces

Similar Documents

Publication Publication Date Title
US20220293309A1 (en) R-t-b-based permanent magnet material, preparation method therefor and use thereof
CN1033623C (en) Method for producting rare earth alloy magnet powder
EP3975212A1 (en) A method for preparation of a sintered type ndfeb permanent magnet with an adjusted grain boundary
SU549266A1 (en) A method of manufacturing sintered permanent magnets based on compounds of rare earth metals with cobalt
Chin et al. New ductile Cr‐Co‐Fe permanent magnet alloys for telephone receiver applications
CN108597709B (en) Preparation method of corrosion-resistant sintered neodymium iron boron
CN112420306B (en) High-performance sintered NdFeB magnetic ring and preparation method thereof
JPS63301505A (en) R-b-fe sintered magnet
JPH01219143A (en) Sintered permanent magnet material and its production
JPS60243247A (en) Permanent magnet alloy
JPS6262503A (en) Permanent magnet
JPS5655533A (en) Manufactre of rare earth element magnet
JPS5952822A (en) Manufacture of permanent magnet
CN110957094A (en) Sintering method of neodymium iron boron magnet
JP2715378B2 (en) Method for producing Nd-Fe-B based sintered magnet
AU2023203147B9 (en) Tungsten electrode for molten salt electrolysis for rare earth metals preparation, and preparation method thereof
US4002508A (en) Composition for permanent magnets of the family "rare earths-transition metals" and process for producing such a magnet
JPS61140108A (en) Manufacture of permanent magnet
CN85104348B (en) 2-17 type rare-earth permament magnet having temp. compensation
JPH0380508A (en) Manufacture of rare earth element magnet
JPH02200778A (en) Sputtering target
JPH06163226A (en) Method of manufacturing rare earth element magnet
JPS61139638A (en) Manufacture of sintered permanent magnet material
JPS594107A (en) Manufacture of rare earth and cobalt group magnetic material
JP3314394B2 (en) Manufacturing method of alloy for rare earth magnet