CORROSION−RESISTANT RARE EARTH ELEMENT MAGNET

Title:

CORROSION−RESISTANT RARE EARTH ELEMENT MAGNET

Document Type and Number:

WIPO Patent Application WO/2003/044810

Kind Code:

A1

Abstract:

A corrosion−resistant rare earth element magnet, characterized in that it comprises a rare earth element parmanent magnet represented by R−T−M−B wherein R is at least one rare earth element including Y, T is Fe or Fe and Co, M is at least one element selected from among Ti, Nb, Al, V, Mn, Sn, Ca, Mg, Pb, Sb, Zn, Si, Zr, Cr, Ni, Cu, Ga, Mo, W and Ta, and wherein respective elements are contained in amounts of 5 wt % ≤ R ≤ 40 wt %, 50 wt % ≤ T ≤ 90 wt %, 0 wt % ≤ M ≤ 8 wt %, 0.2 wt % ≤ B ≤ 8 wt %, and, formed on the surface thereof, a coating film containing a silicone resin, fine metal particles in a flake form and a complexing agent.

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Inventors:

HAMADA RYUJI (JP)
MINOWA TAKEHISA (JP)

Application Number:

PCT/JP2002/011872

Publication Date:

May 30, 2003

Filing Date:

November 14, 2002

Export Citation:

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Assignee:

SHINETSU CHEMICAL CO (JP)
HAMADA RYUJI (JP)
MINOWA TAKEHISA (JP)

International Classes:

C22C38/00; H01F1/053; H01F41/02; B22F3/24; (IPC1-7): H01F1/04; H01F1/08; C22C38/00

Foreign References:

JP2001172770A	2001-06-26
JPS63166944A	1988-07-11

Other References: