WO1996042093A1 - Aimant permanent - Google Patents
Aimant permanent Download PDFInfo
- Publication number
- WO1996042093A1 WO1996042093A1 PCT/JP1996/001544 JP9601544W WO9642093A1 WO 1996042093 A1 WO1996042093 A1 WO 1996042093A1 JP 9601544 W JP9601544 W JP 9601544W WO 9642093 A1 WO9642093 A1 WO 9642093A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- permanent magnet
- rare earth
- earth element
- replaced
- excluding
- Prior art date
Links
Classifications
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/02—Permanent magnets [PM]
-
- 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
- H01F1/0555—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 pressed, sintered or bonded together
- H01F1/0557—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 pressed, sintered or bonded together sintered
Definitions
- the present invention relates to the improvement of permanent magnets, which are one of the most important electric and electronic materials used in a wide range of fields, from various household electrical appliances to peripheral terminals of large computers, and particularly to the addition of Co-added Fe— Mn—related to R-based permanent magnets.
- Conventional technology and problems are one of the most important electric and electronic materials used in a wide range of fields, from various household electrical appliances to peripheral terminals of large computers, and particularly to the addition of Co-added Fe— Mn—related to R-based permanent magnets.
- typical permanent magnets are Alnico, hard ferrite and samakoba magnets, and Fe-BR- (Nd) -based magnetically anisotropic sintered permanent magnets.
- the magnet characteristics are much higher than those of other magnets, and the temperature characteristics are also good, so they can be used mainly for high value-added products such as generator motors. What can be done is required.
- the present invention has been devised as a result of research on the above points.
- the gist of the present invention is that at least one kind of rare earth elements (R) of at least one of Yb, Er, Tm, and Lu is 5 to 35 as atomic percent. %, Mn 1 to 25% and the balance substantially consisting of Fe.In the Fe-Mn-R-based magnetically anisotropic sintered permanent magnet, a part of the Fe is 50% or less with respect to the entire structure.
- R rare earth element
- the atomic percentage of the rare earth element (R) is 10 to 30% (however, 50% or more of the rare earth element (R) is one or two of Yb and Tm), Mn is 1 to 20%, and the balance is substantially It may be composed of Fe and a part of the Fe substituted with 40% or less (excluding 0%) of Co with respect to the whole tissue.
- Tc Curie point
- the present invention provides a part of Fe of a Fe—Mn—R-based magnetically anisotropic sintered permanent magnet based on a novel Fe—Mn—R compound having high magnetic anisotropy.
- a Fe—Mn—R-based magnetically anisotropic sintered permanent magnet based on a novel Fe—Mn—R compound having high magnetic anisotropy.
- FIG. 1 is a diagram showing the relationship between the amount of Co (atomic% on the horizontal axis) and the Curie point in the (80—X) Fe—XCo-1OMn-20Yb system.
- FIG. 2 is a graph showing the relationship between the amount of Yb (atomic% on the horizontal axis) and iHC, Br in the (80-X) Fe ⁇ 5Co ⁇ 1OMn ⁇ LOYb system.
- FIG. 3 is a graph showing the relationship between the amount of Mn (atomic% on the horizontal axis) and iHC, Br in the (80-X) Fe-5Co-XMn-20Yb system.
- FIG. 4 is a diagram of the BH demagnetization curve of sample No. 1 (BH tracer curve 1) in Table 1.
- FIG. 5 is a diagram of a BH demagnetization curve of sample No. 2 (BH tracer curve II) in Table 1.
- Fig. 6 is a BH demagnetization curve of sample No. 8 (BH tracer curve 3) in Table 1.
- FIG. 7 is a diagram of a BH demagnetization curve of sample No. 9 (BH tracer per force) of Table 1.
- FIG. 8 is a BH demagnetization curve of sample No. 24 (BH tracer curve 5) in Table 1.
- Figure 9 is a diagram of the B H demagnetization curve of sample No. 25 (B H tracer curve 1) in Table 1.
- FIG. 10 is a diagram of the B H demagnetization curve of sample No. 26 (B H tracer curve 7) in Table 1.
- Figure 1 shows a typical example of a system in which part of F e of 80 F e — ⁇ ⁇ — 20Yb is replaced by C o (x) (80—X) F e — XC o- ⁇ ⁇ — Up to 80 The change of the Curie point TC when it is changed is shown. This sample was prepared by the following process.
- Table 1 also shows the magnetic properties of each sample at room temperature.
- the coercive force i HC decreases with Co substitution, but B H (max) increases with the improvement of the squareness of the demagnetization curve and the improvement of Br.
- the amount of Co substitution increases, the amount of Co decreases to 50% or less in order to obtain iHC ⁇ IKOe as a permanent magnet material because iHC decreases significantly.
- Table 1 (and also Fig. 3) confirms the above-mentioned reasons for the lower and upper limits of Mn and the lower limit of Yb. table 1
- Atomic percentage composition (%) Br temperature K 0 e K G (BH) max BH training coefficient (% Z ° C) illc (MGOe)
- the temperature characteristics are fundamentally different from those of the conventional Fe—B—R permanent magnet, and the T c (Curie point) Fe—B—R system is 220.
- the Fe-Mn-R system of the present invention has an advantage that it is 420 ° C and 200 ° C higher and is equivalent to or better than conventional Alnico magnets and R-Co system magnets. I have
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Crystallography & Structural Chemistry (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Hard Magnetic Materials (AREA)
- Powder Metallurgy (AREA)
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/776,652 US5840133A (en) | 1995-06-08 | 1996-06-06 | Permanent magnet |
EP96916332A EP0776015A1 (en) | 1995-06-08 | 1996-06-06 | Permanent magnet |
BR9606514A BR9606514A (pt) | 1995-06-08 | 1996-06-06 | Magneto permanente |
AU59113/96A AU720995B2 (en) | 1995-06-08 | 1996-06-06 | Permanent magnet |
KR1019970700630A KR970705155A (ko) | 1995-06-08 | 1996-06-06 | 영구 자석(parmanent magnet) |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7/166858 | 1995-06-08 | ||
JP7166858A JPH08335507A (ja) | 1995-06-08 | 1995-06-08 | 永久磁石 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1996042093A1 true WO1996042093A1 (fr) | 1996-12-27 |
Family
ID=15838955
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1996/001544 WO1996042093A1 (fr) | 1995-06-08 | 1996-06-06 | Aimant permanent |
Country Status (9)
Country | Link |
---|---|
US (1) | US5840133A (ja) |
EP (1) | EP0776015A1 (ja) |
JP (1) | JPH08335507A (ja) |
KR (1) | KR970705155A (ja) |
AU (1) | AU720995B2 (ja) |
BR (1) | BR9606514A (ja) |
CA (1) | CA2195945A1 (ja) |
NZ (1) | NZ309154A (ja) |
WO (1) | WO1996042093A1 (ja) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5120710B2 (ja) * | 2008-06-13 | 2013-01-16 | 日立金属株式会社 | RL−RH−T−Mn−B系焼結磁石 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01298703A (ja) * | 1988-05-26 | 1989-12-01 | Shin Etsu Chem Co Ltd | 希土類永久磁石 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4135953A (en) * | 1975-09-23 | 1979-01-23 | Bbc Brown, Boveri & Company, Limited | Permanent magnet and method of making it |
JPS6024339A (ja) * | 1983-07-19 | 1985-02-07 | Hitachi Metals Ltd | 永久磁石合金 |
JP2970809B2 (ja) * | 1987-12-28 | 1999-11-02 | 信越化学工業株式会社 | 希土類永久磁石 |
US4929275A (en) * | 1989-05-30 | 1990-05-29 | Sps Technologies, Inc. | Magnetic alloy compositions and permanent magnets |
JPH03253001A (ja) * | 1990-03-02 | 1991-11-12 | Toshiba Corp | 鉄基希土類磁石およびその製造方法 |
US5211770A (en) * | 1990-03-22 | 1993-05-18 | Mitsubishi Materials Corporation | Magnetic recording powder having a high coercive force at room temperatures and a low curie point |
-
1995
- 1995-06-08 JP JP7166858A patent/JPH08335507A/ja active Pending
-
1996
- 1996-06-06 EP EP96916332A patent/EP0776015A1/en not_active Withdrawn
- 1996-06-06 NZ NZ309154A patent/NZ309154A/en unknown
- 1996-06-06 BR BR9606514A patent/BR9606514A/pt not_active Application Discontinuation
- 1996-06-06 CA CA002195945A patent/CA2195945A1/en not_active Abandoned
- 1996-06-06 KR KR1019970700630A patent/KR970705155A/ko not_active Application Discontinuation
- 1996-06-06 AU AU59113/96A patent/AU720995B2/en not_active Ceased
- 1996-06-06 US US08/776,652 patent/US5840133A/en not_active Expired - Fee Related
- 1996-06-06 WO PCT/JP1996/001544 patent/WO1996042093A1/ja not_active Application Discontinuation
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01298703A (ja) * | 1988-05-26 | 1989-12-01 | Shin Etsu Chem Co Ltd | 希土類永久磁石 |
Also Published As
Publication number | Publication date |
---|---|
US5840133A (en) | 1998-11-24 |
AU720995B2 (en) | 2000-06-22 |
CA2195945A1 (en) | 1996-12-27 |
EP0776015A1 (en) | 1997-05-28 |
NZ309154A (en) | 1997-05-26 |
KR970705155A (ko) | 1997-09-06 |
JPH08335507A (ja) | 1996-12-17 |
BR9606514A (pt) | 1997-10-14 |
AU5911396A (en) | 1997-01-09 |
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