Method of Manufacturing Fully Dense Nd-Fe-B Magnets with Enhanced Coercivity and Gradient Microstructure
Publication Number: | EP2869311B1 |
Application Date: | 29. 10. 2013 |
Assignee/Applicant: | Jožef Stefan Institute [SI] |
Inventor: | Paul John McGuiness, Marko Soderžnik, Kristina Žagar, Andraž Kocjan, Spomenka Kobe |
Title: | Method of Manufacturing Fully Dense Nd-Fe-B Magnets with Enhanced Coercivity and Gradient Microstructure |
Description: | The present invention relates to a method of manufacturing fully dense Nd-Fe-B magnets by mixing Nd-Fe-B ribbons with a powder containing a heavy rare earth metal. The mixture comprises 1-4 wt% of the heavy rare earth metal and is in the first step spark plasma sintered to a fully dense nanocrystalline Nd-Fe-B magnet and subsequently in a second step annealed to allow the diffusion of the heavy rare earth metal. With this method an enhancement of coercivity of approximately 30 % can be achieved. |
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Category: | Nanotechnology and New Materials |
Technology application codes: | Physical and exact sciences |
Market application codes: | Other electronics related, Industrial products |
www: | https://worldwide.espacenet.com/patent/search/family/049553978/publication/EP2869311B1?q=EP2869311B1 |
Patent offices: | EPO |