The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 27, 2005
Filed:
Feb. 06, 2003
Zhongmin Chen, Apex, NC (US);
Benjamin R. Smith, Raleigh, NC (US);
Bao-min MA, Cary, NC (US);
James W. Herchenroeder, Gaston, IN (US);
Zhongmin Chen, Apex, NC (US);
Benjamin R. Smith, Raleigh, NC (US);
Bao-Min Ma, Cary, NC (US);
James W. Herchenroeder, Gaston, IN (US);
Magnequench, Inc., Singapore, SG;
Abstract
The present invention relates to highly quenchable Fe-based rare earth magnetic materials that are made by rapid solidification process and exhibit good magnetic properties and thermal stability. More specifically, the invention relates to isotropic Nd—Fe—B type magnetic materials made from a rapid solidification process with a lower optimal wheel speed and a broader optimal wheel speed window than those used in producing conventional magnetic materials. The materials exhibit remanence (B) and intrinsic coercivity (H) values of between 7.0 to 8.5 kG and 6.5 to 9.9 kOe, respectively, at room temperature. The invention also relates to process of making the materials and to bonded magnets made from the magnetic materials, which are suitable for direct replacement of anisotropic sintered ferrites in many applications.