Method of manufacturing fully dense Nd-Fe-B magnets with enhanced coercivity and gradient microstructure | Center za prenos tehnologij in inovacij na Institutu "Jožef Stefan"

Method of manufacturing fully dense Nd-Fe-B magnets with enhanced coercivity and gradient microstructure

Publication Number: EP2869311A1
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/publicationDetails/biblio?FT=D&date=20150506&DB=&locale=en_EP&CC=EP&NR=2869311A1&KC=A1&ND=4
Patent offices: EPO