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. |
| Drawings: |
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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 |
