CORROSION-RESISTANT MAGNET AND METHOD FOR PRODUCING THE SAME

Title:

CORROSION-RESISTANT MAGNET AND METHOD FOR PRODUCING THE SAME

Document Type and Number:

WIPO Patent Application WO/2011/081170

Kind Code:

A1

Abstract:

Provided is an R-Fe-B sintered magnet the surface of which has a chemical coating that is superior in corrosion resistance to conventional chemical coatings such as phosphate coatings, and also provided is a method for producing the R-Fe-B sintered magnet. The R-Fe-B sintered magnet the surface of which has a chemical coating is obtained by chemically coating the surface of an R-Fe-B sintered magnet (where R is a rare earth element that contains at least Nd) with a phosphorus-free laminated structure comprising at least an inner layer containing R, fluorine, and oxygen as structural elements and an amorphous outer layer containing Zr, Fe, and oxygen as structural elements.

More Like This:

JP4755080	Highly quenchable Fe-based rare earth material to replace ferrite
JP2004536959	Isotropic rare earth material with high intrinsic magnetic flux density
WO/2006/059603	PERMANENT MAGNET FOR MOTOR, MOTOR HOUSING AND MOTOR DEVICE

Inventors:

NIINAE TOSHINOBU (JP)
YOSHIMURA KOSHI (JP)
KAMIYAMA KOJI (JP)

Application Number:

PCT/JP2010/073675

Publication Date:

July 07, 2011

Filing Date:

December 28, 2010

Export Citation:

Click for automatic bibliography generation Help

Assignee:

HITACHI METALS LTD (JP)
NIINAE TOSHINOBU (JP)
YOSHIMURA KOSHI (JP)
KAMIYAMA KOJI (JP)

International Classes:

H01F1/053; B22F3/24; C22C33/02; C22C38/00; C23C22/34; H01F1/08; H01F41/02

Domestic Patent References:

WO2010001878A2	2010-01-07
WO2002103080A1	2002-12-27

Foreign References:

JP2008270699A	2008-11-06
JP2004327966A	2004-11-18
JP2000199074A	2000-07-18

Other References: