- Patent Title: Modified Nd—Fe—B permanent magnet with high corrosion resistance
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Application No.: US13132266Application Date: 2008-12-01
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Publication No.: US09818515B2Publication Date: 2017-11-14
- Inventor: Mi Yan , Xiangzhi Zhou , Xiongfei Fan , Tianyu Ma , Wei Luo
- Applicant: Mi Yan , Xiangzhi Zhou , Xiongfei Fan , Tianyu Ma , Wei Luo
- Applicant Address: CN Hangzhou CN Dongyang
- Assignee: ZHEJIANG UNIVERSITY,ZHEJIANG INNUOVO MAGNETICS INDUSTRY CO., LTD
- Current Assignee: ZHEJIANG UNIVERSITY,ZHEJIANG INNUOVO MAGNETICS INDUSTRY CO., LTD
- Current Assignee Address: CN Hangzhou CN Dongyang
- Agency: Hamre, Schumann, Muller & Larson, P.C.
- International Application: PCT/CN2008/073271 WO 20081201
- International Announcement: WO2010/063143 WO 20100610
- Main IPC: H01F7/02
- IPC: H01F7/02 ; H01F1/057 ; H01F41/02
Abstract:
A type of sintered Nd—Fe—B permanent magnet with high corrosion resistance is produced by dual alloy method. The method comprises the following steps: preparing the powders of master phase alloy and intergranular phase alloy respectively, mixing the powders, compacting the powders in magnetic field, sintering the compacted body at 1050˜1125° C., and annealing at 920-1020° C. and 500-650° C. successively.
Public/Granted literature
- US20110234350A1 MODIFIED ND-FE-B PERMANENT MAGNET WITH HIGH CORROSION RESISTANCE Public/Granted day:2011-09-29
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