EP0342921A2 - Weichmagnetische Legierung auf Eisenbasis - Google Patents

Weichmagnetische Legierung auf Eisenbasis Download PDF

Info

Publication number
EP0342921A2
EP0342921A2 EP89304925A EP89304925A EP0342921A2 EP 0342921 A2 EP0342921 A2 EP 0342921A2 EP 89304925 A EP89304925 A EP 89304925A EP 89304925 A EP89304925 A EP 89304925A EP 0342921 A2 EP0342921 A2 EP 0342921A2
Authority
EP
European Patent Office
Prior art keywords
soft magnetic
atomic
based soft
magnetic alloy
crystal grains
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
EP89304925A
Other languages
English (en)
French (fr)
Other versions
EP0342921A3 (en
EP0342921B1 (de
Inventor
Takao C/O Intellectual Property Division Sawa
Masami C/O Intellectual Property Division Okamura
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=14734016&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0342921(A2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Toshiba Corp filed Critical Toshiba Corp
Publication of EP0342921A2 publication Critical patent/EP0342921A2/de
Publication of EP0342921A3 publication Critical patent/EP0342921A3/en
Application granted granted Critical
Publication of EP0342921B1 publication Critical patent/EP0342921B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • 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
    • H01F1/12—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 soft-magnetic materials
    • H01F1/14—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 soft-magnetic materials metals or alloys
    • H01F1/147—Alloys characterised by their composition
    • H01F1/153—Amorphous metallic alloys, e.g. glassy metals
    • H01F1/15308—Amorphous metallic alloys, e.g. glassy metals based on Fe/Ni

Definitions

  • This invention relates to Fe-based, soft magnetic alloys.
  • iron cores of crystalline materials such as permalloy or ferrite have been employed in high frequency devices such as switching regulators.
  • the resistivity of permalloy is low, so it is subject to large core loss at high frequency.
  • the core loss of ferrite at high frequencies is small, the magnetic flux density is also small, at best 5,000 G. Consequently, in use at high operating magnetic flux densities, ferrite becomes close to saturation and as a result the core loss is increased.
  • transformers that are used at high frequency such as the power transformers employed in switching regulators, smoothing choke coils, and common mode choke coils.
  • the size is reduced, the operating magnetic flux density must be increased, so the increase in core loss of the ferrite becomes a serious practical problem.
  • amorphous magnetic alloys i.e., alloys without a crystal structure
  • Such amorphous magnetic alloys are typically base alloys of Fe, Co, Ni, etc., and contain metalloids as elements promoting the amorphous state, (P, C, B, Si, Al, and Ge, etc.).
  • Co-based, amorphous alloys also have been used in magnetic components for electronic devices such as saturable reactors, since they have low core loss and high squareness ratio in the high frequency region.
  • the cost of Co-based alloys is comparatively high making such materials uneconomical.
  • Fe-based amorphous alloys constitute cheap soft magnetic materials and have comparatively large magnetostriction, they suffer from various problems when used in the high frequency region and are inferior to Co-based amorphous alloys in respect of both core loss and permeability.
  • Co-based amorphous alloys have excellent magnetic properties, they are not industrially practical due to the high cost of such materials.
  • the object of this invention is to provide an Fe-based, soft magnetic alloy having high saturation magnetic flux density in the high frequency region and with excellent soft magnetic characteristics.
  • an Fe-based soft magnetic alloy having fine crystal grains, as described in the following formula (I) Fe 100-a-b-c-d M a M′ b Y c N d (I) where "M” is at least one element from the following: Cu, Ag, Au, Zn, Sn, Pb, Sb, and Bi; "M′” is at least one element from the following:elements in Groups IVa, Va, VIa of the periodic table, Mn, Co, Ni, and Al; "Y” is at least one element from the following: Si, P, and B; and wherein "a”, “b”, “c”, and “d”, expressed in atomic % are as folloiws: 0.01 ⁇ a ⁇ 5 0.1 ⁇ b ⁇ 10 15 ⁇ c ⁇ 28 0 ⁇ d ⁇ 8.
  • fine crystal grains are present in the alloy to the extent of 30% or more in terms of area ratio. It is further desirable that at least 80% of the fine crystal grains are of a crystal grain size of 50 ⁇ to 300 ⁇ .
  • area ratio of the fine crystal grains as used herein means the ratio of the surface of the fine grains to the total surface in a plane of the alloy as measured, for example, by photomicrograph or by microscopic examination of ground and polished specimens.
  • composition thereof should be balanced and within the limits as hereinafter discussed.
  • An alloy in accordance with the invention contains: Fe; N; at least one of Cu, Ag, Au, Zn, Pb, Sb, and Bi; at least one of element from Groups IVa, Va and VIa of the period table, Mn, Co, Ni, and Al; and at least one of Si, P, and B; in accordance with the formula (I): Fe 100-a-b-c-d M a M′ b Y c N d (I) where "M" is at least one of: Cu, Ag, Au, Zn, Sn, Pb, Sb, and Bi; "M” is at least one element from the following: Groups IVa, Va, VIa of the periodic table, Mn, Co, Ni, and Al; "Y” is at least one element from the following: Si, P, or B; and wherein “a”, “b”, “c”, and “d” expressed in atomic % are as follows: 0.01 ⁇ a ⁇ 5 0.1 ⁇ b ⁇ 10 15 ⁇ c ⁇ 28
  • alloys according to the invention contain the aforesaid components in the specified amounts to obtain the advantageous characteristics of the new alloys.
  • M is at least one of: Cu, Ag, Au, Zn, Sn, Pb, Sb and Bi. These elements can be effective in increasing corrosion resistance, preventing coarsening of the crystal grains, and in improving soft magnetic properties such as core loss and permeability. However, if there is too little, the benefit of its addition is not obtained. On the other hand, if there is too much "M", deterioration of magnetic properties results. A range of 0.01 to 5 atomic % is therefore selected. Preferably the amount is 0.5 to 3 atomic %.
  • M′ is an element which can be effective in making the crystal grain size uniform and in improving the soft magnetic properties by reducing magnetostriction and magnetic anisotropy. It can also be effective in improving the magnetic properties in respect of temperature change. However, if the amount of "M′” is too small, the benefit of the addition is not obtained. On the other hand, if the amount is too large, the saturation magnetic flux density is lowered. An amount of "M′” in the range of 0.1 to 10 atomic % is therefore selected. Preferably the amount is 1 to 7 atomic % and even more preferably 1.5 to 5 atomic %.
  • the various additive elements in M′ can have the following respective effects: in the case of Group IVa elements, increase of the range of heat treatment conditions for obtaining optimum magnetic properties; in the case of Group Va elements and Mn, increase in resistance to embrittlement and increase in workability such as by cutting; in the case of the Group VIa elements, improvement of corrosion resistance and surface shape; in the case of Al, increased fineness of the crystal grains and reduction of magnetic anisotropy, thereby improving magnetostriction and soft magnetic properties.
  • Y comprises elements that can be effective in making the alloy amorphous during manufacture, or in directly segregating fine crystals. If the amount is too small, the benefit of superquenching in manufacture is difficult to obtain and the above condition is not obtained. On the other hand, if the amount of "Y" is too great, the saturation magnetic flux density becomes low, also making the above condition difficult to obtain, with the result that superior magnetic properties are not obtained.
  • An amount in the range 15 to 28 atomic % is therefore selected. Preferably the range is 18 to 26 atomic %.
  • the ratio of Si/B and/or Si/P is preferably more than 1.
  • Nitrogen is included because it can be effective in expanding the range of heat treatment conditions in order to obtain optimum magnetic properties. However, if there is too much N, fine crystals are difficult to obtain, so the amount is specified as being less than 8 at. %. Preferably it is less than 6 atomic %, and even more preferably less than 4 atomic %.
  • the Fe-based soft magnetic alloy of this invention may be obtained by the following method:
  • An amorphous alloy thin strip is obtained by liquid quenching, then heat treated for one minute to ten hours, preferably ten minutes to five hours at a temperature of 50C o below to 120C o above the crystallization temperature of the amorphous alloy, preferably 30C o below to 100C o above, to segregate the required fine crystals.
  • direct segregation of the fine crystals can be accomplished by controlling quenching rate in the liquid quenching method.
  • Fe-based soft magnetic alloys of this invention can have excellent soft magnetic properties at high frequency. They may exhibit excellent properties as an alloy for magnetic materials for magnetic components such as magnetic cores used at radio frequency, such as, for example, magnetic heads, thin film heads, radio frequency transformers including transformers for high power use, saturable reactors, common mode choke coils, normal mode choke coils, high voltage pulse noise filters, and magnetic switches used in laser power sources, and the like, and for sensors of various types, such as power source sensors, directions sensors, and security sensors, and the like.
  • magnetic components such as magnetic cores used at radio frequency, such as, for example, magnetic heads, thin film heads, radio frequency transformers including transformers for high power use, saturable reactors, common mode choke coils, normal mode choke coils, high voltage pulse noise filters, and magnetic switches used in laser power sources, and the like, and for sensors of various types, such as power source sensors, directions sensors, and security sensors, and the like.
  • An amorphous alloy thin strip of thickness 15 ⁇ m was obtained by the single roll method from an alloy consisting of Fe74Cu2Mo2Si11B9N2. This amorphous alloy was then wound to form a toroidal core of external diameter 18 mm, internal diameter 12 mm, and height 4.5 mm, then heat treated for about 90 minutes at about 550°C. The crystallization of this alloy was about 575°C at a temperature rise rate of 10C o /min (measured with a rate of temperature rise of 10C o /min.
  • Fine crystal grains were present to the extent of about 85% with respect to the total area of the alloy in the magnetic core that was obtained. Of these, fine crystal grains of 50 ⁇ to 300 ⁇ represented about 90%.
  • a magnetic core was manufactured on which heat treatment was performed for about 40 minutes at about 450°C. It was found by TEM observation that fine crystal grains had not segregated in this magnetic core.
  • Fe-based soft iron alloy can be provided having excellent soft magnetic properties, having fine crystal grains in the desirerd alloy composition, with high saturated magnetic flux density in the high frequency region, and the required Fe-based soft magnetic materials can be easily manufactured, owing to the wide temperature range of heat treatment possible.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Soft Magnetic Materials (AREA)
EP89304925A 1988-05-17 1989-05-16 Weichmagnetische Legierung auf Eisenbasis Expired - Lifetime EP0342921B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP63118331A JP2823203B2 (ja) 1988-05-17 1988-05-17 Ｆｅ基軟磁性合金
JP118331/88 1988-05-17

Publications (3)

Publication Number Publication Date
EP0342921A2 true EP0342921A2 (de) 1989-11-23
EP0342921A3 EP0342921A3 (en) 1989-12-20
EP0342921B1 EP0342921B1 (de) 1993-09-01

Family

ID=14734016

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89304925A Expired - Lifetime EP0342921B1 (de) 1988-05-17 1989-05-16 Weichmagnetische Legierung auf Eisenbasis

Country Status (4)

Country Link
EP (1) EP0342921B1 (de)
JP (1) JP2823203B2 (de)
KR (1) KR930010639B1 (de)
DE (1) DE68908768T2 (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0414974A1 (de) * 1989-09-01 1991-03-06 Masaaki Yagi Dünner weichmagnetischer Streifen aus einer Legierung
US5382304A (en) * 1990-03-16 1995-01-17 The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland Ferromagnetic materials
US5622768A (en) * 1992-01-13 1997-04-22 Kabushiki Kaishi Toshiba Magnetic core
US5656101A (en) * 1994-03-28 1997-08-12 Alps Electric Co., Ltd. Soft magnetic alloy thin film with nitrogen-based amorphous phase
US5725686A (en) * 1993-07-30 1998-03-10 Hitachi Metals, Ltd. Magnetic core for pulse transformer and pulse transformer made thereof
EP1850334A1 (de) * 2006-04-27 2007-10-31 Heraeus, Inc. Weichmagnetische Unterschicht in magnetischen Mitteln und Sputtertarget mit weichmagnetischer Legierung

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69018422T2 (de) * 1989-12-28 1995-10-19 Toshiba Kawasaki Kk Auf Eisen basierende weichmagnetische Legierung, ihr Herstellungsverfahren und Magnetkern daraus.
PL1994375T3 (pl) 2006-03-11 2016-08-31 Kracht Gmbh Przepływomierz objętościowy z czujnikiem
KR102465581B1 (ko) * 2017-08-18 2022-11-11 삼성전기주식회사 Fe계 나노결정립 합금 및 이를 이용한 전자부품

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH443505A (de) * 1960-10-31 1967-09-15 Du Pont Ferromagnetischer Werkstoff
DE2005371B2 (de) * 1970-02-06 1974-01-17 Fried. Krupp Gmbh, 4300 Essen Verfahren zur Herstellung weichmagnetischer Eisen-Nickel-Legierungen
EP0271657A2 (de) * 1986-12-15 1988-06-22 Hitachi Metals, Ltd. Weichmagnetische Legierung auf Eisenbasis und Herstellungsverfahren
EP0302355A1 (de) * 1987-07-23 1989-02-08 Hitachi Metals, Ltd. Weichmagnetisches Pulver aus einer auf Eisen basierenden Legierung, Magnetkern daraus und Herstellungsverfahren
JPH05273120A (ja) * 1992-03-27 1993-10-22 Hoya Corp 偏光解析装置

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4992600A (de) * 1973-01-09 1974-09-04
JPS5449936A (en) * 1977-09-29 1979-04-19 Pioneer Electronic Corp High permiable* soft magnetic material and method of making same
JP2713364B2 (ja) * 1988-05-11 1998-02-16 日立金属株式会社 耐熱性に優れた超微結晶軟磁性合金

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH443505A (de) * 1960-10-31 1967-09-15 Du Pont Ferromagnetischer Werkstoff
DE2005371B2 (de) * 1970-02-06 1974-01-17 Fried. Krupp Gmbh, 4300 Essen Verfahren zur Herstellung weichmagnetischer Eisen-Nickel-Legierungen
EP0271657A2 (de) * 1986-12-15 1988-06-22 Hitachi Metals, Ltd. Weichmagnetische Legierung auf Eisenbasis und Herstellungsverfahren
EP0302355A1 (de) * 1987-07-23 1989-02-08 Hitachi Metals, Ltd. Weichmagnetisches Pulver aus einer auf Eisen basierenden Legierung, Magnetkern daraus und Herstellungsverfahren
JPH05273120A (ja) * 1992-03-27 1993-10-22 Hoya Corp 偏光解析装置

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0414974A1 (de) * 1989-09-01 1991-03-06 Masaaki Yagi Dünner weichmagnetischer Streifen aus einer Legierung
US5096513A (en) * 1989-09-01 1992-03-17 Kabushiki Kaisha Toshiba Very thin soft magnetic alloy strips and magnetic core and electromagnetic apparatus made therefrom
US5382304A (en) * 1990-03-16 1995-01-17 The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland Ferromagnetic materials
US5622768A (en) * 1992-01-13 1997-04-22 Kabushiki Kaishi Toshiba Magnetic core
US5804282A (en) * 1992-01-13 1998-09-08 Kabushiki Kaisha Toshiba Magnetic core
US5725686A (en) * 1993-07-30 1998-03-10 Hitachi Metals, Ltd. Magnetic core for pulse transformer and pulse transformer made thereof
US5656101A (en) * 1994-03-28 1997-08-12 Alps Electric Co., Ltd. Soft magnetic alloy thin film with nitrogen-based amorphous phase
US5725685A (en) * 1994-03-28 1998-03-10 Alps Electric Co., Ltd. Soft magnetic alloy thin film with nitrogen-based amorphous phase
US5896078A (en) * 1994-03-28 1999-04-20 Alps Electric Co., Ltd. Soft magnetic alloy thin film and plane-type magnetic device
EP1850334A1 (de) * 2006-04-27 2007-10-31 Heraeus, Inc. Weichmagnetische Unterschicht in magnetischen Mitteln und Sputtertarget mit weichmagnetischer Legierung

Also Published As

Publication number Publication date
EP0342921A3 (en) 1989-12-20
DE68908768D1 (de) 1993-10-07
EP0342921B1 (de) 1993-09-01
KR930010639B1 (ko) 1993-11-02
DE68908768T2 (de) 1993-12-23
JP2823203B2 (ja) 1998-11-11
KR890017729A (ko) 1989-12-18
JPH01290744A (ja) 1989-11-22

Similar Documents

Publication Publication Date Title
US4881989A (en) Fe-base soft magnetic alloy and method of producing same
EP0430085B1 (de) Magnetlegierung mit ultrakleinen Kristallkörnern und Herstellungsverfahren
US5340413A (en) Fe-NI based soft magnetic alloys having nanocrystalline structure
US5178689A (en) Fe-based soft magnetic alloy, method of treating same and dust core made therefrom
US5019190A (en) Fe-based soft magnetic alloy
US5211767A (en) Soft magnetic alloy, method for making, and magnetic core
EP0429022B1 (de) Magnetlegierung mit ultrakleinen Kristallkörnern und Herstellungsverfahren
US5225006A (en) Fe-based soft magnetic alloy
EP0342923B1 (de) Weichmagnetische Legierung auf Eisenbasis
JP2894561B2 (ja) 軟磁性合金
JP3231149B2 (ja) ノイズフィルタ
EP0342921A2 (de) Weichmagnetische Legierung auf Eisenbasis
US5192375A (en) Fe-based soft magnetic alloy
EP0342922B1 (de) Weichmagnetische Legierung auf Eisenbasis und daraus hergestellter Pulverkern
EP0351051B1 (de) Weichmagnetische, auf Eisen basierende Legierung
JP2919886B2 (ja) Ｆｅ基軟磁性合金
JP2713980B2 (ja) Ｆｅ基軟磁性合金
JP2760539B2 (ja) Ｆｅ基軟磁性合金
JP2815926B2 (ja) 磁性コア
JPH0578794A (ja) 超微結晶合金薄帯及び粉末並びにこれを用いた磁心
JPH04272159A (ja) Ｆｅ基磁性合金
JPH02138444A (ja) Ｆｅ基軟磁性合金およびＦｅ基圧粉磁心
JPH06181113A (ja) Ｆｅ基恒透磁率磁心
JPH01290745A (ja) Ｆｅ基軟磁性合金
JP2000173813A (ja) 磁性部品

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

17P Request for examination filed

Effective date: 19890607

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): DE FR GB

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): DE FR GB

17Q First examination report despatched

Effective date: 19920407

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB

REF Corresponds to:

Ref document number: 68908768

Country of ref document: DE

Date of ref document: 19931007

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
REG Reference to a national code

Ref country code: GB

Ref legal event code: 746

Effective date: 19981012

REG Reference to a national code

Ref country code: FR

Ref legal event code: D6

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20020508

Year of fee payment: 14

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20020515

Year of fee payment: 14

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030516

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20030516

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040130

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20080522

Year of fee payment: 20