GB2339797A - Magnetic alloys - Google Patents

Magnetic alloys Download PDF

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Publication number
GB2339797A
GB2339797A GB9815849A GB9815849A GB2339797A GB 2339797 A GB2339797 A GB 2339797A GB 9815849 A GB9815849 A GB 9815849A GB 9815849 A GB9815849 A GB 9815849A GB 2339797 A GB2339797 A GB 2339797A
Authority
GB
United Kingdom
Prior art keywords
alloy
alloys
alloy according
magnetic alloys
range
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.)
Withdrawn
Application number
GB9815849A
Other versions
GB9815849D0 (en
Inventor
Rodney Vistor Major
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.)
TELCON Ltd
Original Assignee
TELCON Ltd
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 TELCON Ltd filed Critical TELCON Ltd
Priority to GB9815849A priority Critical patent/GB2339797A/en
Publication of GB9815849D0 publication Critical patent/GB9815849D0/en
Publication of GB2339797A publication Critical patent/GB2339797A/en
Withdrawn legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/10—Ferrous alloys, e.g. steel alloys containing cobalt
    • 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
    • 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
    • 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
    • H01F1/15333—Amorphous metallic alloys, e.g. glassy metals containing nanocrystallites, e.g. obtained by annealing
    • 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
    • H01F1/15341—Preparation processes therefor

Description

1 2339797 MAGNETIC ALLOYS The present invention relates to high
permeability soft magnetic alloys in a nanocrystalline form produced by electro deposition.
A method of producing a high permeability alloy in a nanocrystalline form was revealed by Yoshizawa et al in the invention disclosed in patent EPA 0271657. An alloy repTesented by the general formula [Fe,l-aMal 100-x-y-z- ,X Cu x Siy B, M',, is described. The alloys of the invention are first produced in an amorphous form and then heat treated to develop a fine crystallite phase based on iron. The ability to restrict the dimensions of these crystallite to nanometer size during heat treatment is attributed to the copper addition. It is stated that this copper addition also prevents a compound phase in the crystallites which would produce unsatisfactory magnetic properties.
The present invention provides the ability to produce nanocrystalline high permeability alloys without the necessity to fabricate in an amorphous state and subsequently heat treat to form the nanocrystalline state, with all restrictions on physical size and composition that are necessary to achieve the initial amorphous state.
In the present invention high permeability is achieved by the electro deposition of alloys having an average grain size of 35nm or less, occupying at least 70% of the alloy structure. Preferably the average grain size shall be 20nm or less and occupy preferably at least 90% of the alloy structure. The saturation magnetostriction of the alloy shal I be within the range 10 x 10-6 and preferably within the range 5 x 10 -6 Examples of suitable alloys are 24% cobalt balance iron, 1-3% nickel balance iron, 5-7% silicon balance iron. Minor alloying ingredients and incidental impurities may be present up to a total of I%.
2 CLAIMS
1) A soft magnetic alloy produced by electro deposition with at least 70% of structure having an average grain size of 35m or less and a saturation magnetostriction within the range 10 x 10-6.
2) An alloy according to claim I with at least 90% of the structure having an average grain size of 35nm or less.
3) An alloy according to claim I with at least 70% having an average grain size of 20nm or less.
4) An alloy according to claim I with a saturation magnetostriction within the range 5 x 10'.
5) An alloy according to claim 2 with a saturation magnetostriction within the range 5 x 10-1.
6) An alloy according to claim 3 with a saturation magnetostriction within the range 5 x 10'..
7) An alloy according to claim I with the composition 24% cobalt, balance iron apart from minor alloying ingredients and incidental impurities up to a total of I %.
8) An alloy according to claim I with the composition 1-3% nickel, balance iron apart from minor alloying ingredients and incidental impurities up to a total of 1%.
9) An alloy according to claim I with the composition 5-7% silicon, balance iron apart from minor alloying ingredients and incidental impurities up to a total of 1%.
GB9815849A 1998-07-22 1998-07-22 Magnetic alloys Withdrawn GB2339797A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9815849A GB2339797A (en) 1998-07-22 1998-07-22 Magnetic alloys

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9815849A GB2339797A (en) 1998-07-22 1998-07-22 Magnetic alloys

Publications (2)

Publication Number Publication Date
GB9815849D0 GB9815849D0 (en) 1998-09-16
GB2339797A true GB2339797A (en) 2000-02-09

Family

ID=10835893

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9815849A Withdrawn GB2339797A (en) 1998-07-22 1998-07-22 Magnetic alloys

Country Status (1)

Country Link
GB (1) GB2339797A (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1083102A (en) * 1964-04-27 1967-09-13 Ibm Method and apparatus for electroplating articles
GB1136492A (en) * 1965-04-02 1968-12-11 Bull General Electric Improvements in electrolytic processes for the production of thin ferromagnetic film
EP0271657A2 (en) * 1986-12-15 1988-06-22 Hitachi Metals, Ltd. Fe-base soft magnetic alloy and method of producing same
JPH0270085A (en) * 1988-09-02 1990-03-08 Sony Corp Production of amorphous soft magnetic film
WO1994012695A1 (en) * 1992-11-30 1994-06-09 Queen's University At Kingston Nanocrystalline metals
US5435903A (en) * 1989-10-12 1995-07-25 Mitsubishi Rayon Company, Ltd. Process for the electrodeposition of an amorphous cobalt-iron-phosphorus alloy

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1083102A (en) * 1964-04-27 1967-09-13 Ibm Method and apparatus for electroplating articles
GB1136492A (en) * 1965-04-02 1968-12-11 Bull General Electric Improvements in electrolytic processes for the production of thin ferromagnetic film
EP0271657A2 (en) * 1986-12-15 1988-06-22 Hitachi Metals, Ltd. Fe-base soft magnetic alloy and method of producing same
JPH0270085A (en) * 1988-09-02 1990-03-08 Sony Corp Production of amorphous soft magnetic film
US5435903A (en) * 1989-10-12 1995-07-25 Mitsubishi Rayon Company, Ltd. Process for the electrodeposition of an amorphous cobalt-iron-phosphorus alloy
WO1994012695A1 (en) * 1992-11-30 1994-06-09 Queen's University At Kingston Nanocrystalline metals

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PAJ ABV. 014254 & JP 02 070 085 A *

Also Published As

Publication number Publication date
GB9815849D0 (en) 1998-09-16

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