Patent EP0311049A2 successfully refreshed from Google Patents.
EP0311049A2
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Corrosion resistant rare earth metal magnet
Assignee: JFE Steel Corp
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Filing: 1988-10-05
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Granted: —
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Expires: 2008-10-05
Abstract
Abstract A rare earth metal-transition metal type magnet alloy having excellent coercive force, squareness, corrosion resistance and temperature characteristics is disclosed, which alloy consists of at least one of Y and lanthanoid; B; occasionally at least one of Mg, At, Si, Ca, Ti, V, Cr, Mn, Cu, Zn, Ga, Ge, Zr, Nb, Mo, In, Sn, Ta and W; and the remainder being substantially transition metals of Fe, Co and Ni.
Inventors
- 👤 Michio C/O Technical Research Division Shimotomai
- 👤 Yasutaka C/O Technical Research Division Fukuda
- 👤 Akira C/O Technical Research Division Fujita
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 19:47
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/10; C22C38/105; C22C19/00; C22C19/07; H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/032; H01F1/04; H01F1/047; H01F1/053; H01F1/055; H01F1/057; H01F1/0571; H01F1/0575; H01F1/0577
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
100 words
A rare earth metal-transition metal type magnet alloy having a composition consisting of 10-25 at% of RE, wherein RE represents at least one metal selected from the group consisting of Y and lanthanoid; 2-20 at% of B; and the remainder being substantially transition metals of Fe, Co and Ni in such amounts that the amount of Fe is not less than 10 at% but less than 73 at%, that of Co is 7-50 at%, that of Ni is 5-30 at%, and the total amount of Fe, Co and Ni is not less than 55 at% but less than 88 at%.
Claim 2
Dependent Claim
100 words
A rare earth metal-transition metal type magnet alloy having a composition consisting of 10-25 at% of RE, wherein RE represents at least one metal selected from the group consisting of Y and lanthanoid; 2-20 at% of B; and the remainder being substantially transition metals of Fe, Co and Ni in such amounts that the amount of Fe is not less than 10 at% but less than 73 at%, that of Co is 7-50 at%, that of Ni is 5-30 at%, and the total amount of Fe, Co and Ni is not less than 55 at% but less than 88 at%.
Claim 3
Dependent Claim
136 words
A rare earth metal-transition metal type magnet alloy having a composition consisting of 10-25 at% of RE, wherein RE represents at least one metal selected from the group consisting of Y and lanthanoid; 2-20 at% of B; not more than 8 at% of at least one metal selected from the group consisting of Mg, At, Si, Ca, Ti, V, Cr, Mn, Cu, Zn, Ga, Ge, Zr, Nb, Mo, In, Sn, Ta and W; and the remainder being substantially transition metals of Fe, Co and Ni in such amounts that the amount of Fe is not less than 10 at% but less than 73 at%, that of Co is 7-50 at%, that of Ni is 5-30 at%, and the total amount of Fe, Co and Ni is not less than 55 at% but less than 88 at%.
Claim 4
Dependent Claim
136 words
A rare earth metal-transition metal type magnet alloy having a composition consisting of 10-25 at% of RE, wherein RE represents at least one metal selected from the group consisting of Y and lanthanoid; 2-20 at% of B; not more than 8 at% of at least one metal selected from the group consisting of Mg, At, Si, Ca, Ti, V, Cr, Mn, Cu, Zn, Ga, Ge, Zr, Nb, Mo, In, Sn, Ta and W; and the remainder being substantially transition metals of Fe, Co and Ni in such amounts that the amount of Fe is not less than 10 at% but less than 73 at%, that of Co is 7-50 at%, that of Ni is 5-30 at%, and the total amount of Fe, Co and Ni is not less than 55 at% but less than 88 at%.
References Cited (Backward Citations)
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