Invention Grant
- Patent Title: Method of manufacturing oriented body, molded body and sintered body as well as method of manufacturing permanent magnet
- Patent Title (中): 制造定向体，成型体和烧结体的方法以及制造永磁体的方法
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Application No.: US12515551Application Date: 2007-11-19
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Publication No.: US08128757B2Publication Date: 2012-03-06
- Inventor: Hiroshi Nagata , Yoshinori Shingaki
- Applicant: Hiroshi Nagata , Yoshinori Shingaki
- Applicant Address: JP Kanagawa
- Assignee: Ulvac, Inc.
- Current Assignee: Ulvac, Inc.
- Current Assignee Address: JP Kanagawa
- Agency: Cermak Nakajima LLP
- Agent Tomoko Nakajima
- Priority: JP2006-313827 20061121; JP2007-003400 20070111
- International Application: PCT/JP2007/072392 WO 20071119
- International Announcement: WO2008/062757 WO 20080529
- Main IPC: H01F1/03
- IPC: H01F1/03 ; C21D1/02
Abstract:
There is provided a method of manufacturing a permanent magnet having extremely high orientation by arranging such that the crystal fractures of alloy raw meal powder having more equal crystal orientational relationship are combined in magnetic field. In this invention, alloy raw meal powder is filled into a cavity and, while agitating the alloy raw meal powder inside the cavity, is oriented in the magnetic field. This oriented body is then compression molded in the magnetic field into a predetermined shape.
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