Metal-bonded RE-Fe-B Magnets
Publication Number: | US20160322136A1 |
Application Date: | 30. 4. 2015 |
Assignee/Applicant: | Jožef Stefan Institute [SI] |
Inventor: | Luka Kelhar, Paul Mcguinnes, Spomenka Kobe |
Title: | Metal-bonded RE-Fe-B Magnets |
Description: | This invention relates to bonded magnets and the method for their production. Such magnets benefit from the fact that for binding, they utilize Low-Melting-Point metal or an alloy, and thus can be used at temperatures where conventional bonded magnets cannot operate. This composite magnet is made of magnetic phase and non-magnetic metallic binder. The mechanical and magnetic properties of metal-bonded magnets vary with the ratio of the two phases. The optimum result is achieved when adding 20-40 wt. % of binder. A huge difference can be observed between conventional and spark-plasma sintering (SPS) processing. An increase in remanence is up to 30%, as a consequence of simultaneous application of pressure and temperature. Additionally, minimized expo- sure time contributes to preservation of magnetic properties, which is a strong advantage of SPS technique. The value added of such magnets is the ability to withstand temperatures above 200° C., due to metallic matrix. |
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Category: | Nanotechnology and New Materials |
Technology application codes: | Physical and exact sciences, Industrial manufacturing, material and transport |
Market application codes: | Communications, Computer related, Other electronics related |
www: | https://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20161103&DB=&locale=en_EP&CC=US&NR=2016322136A1&KC=A1&ND=4 |
Patent offices: | US |