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US 11,837,391 B2Granted
Sintered R2M17 magnet and method of fabricating a R2M17 magnet
AssigneeVacuumschmelze GmbH & Co. KG
InventorsKaan Üstüner, Matthias Katter, Christoph Brombacher
Life of this patent
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Abstract
A sintered R2M17 magnet is provided that comprises at least 70 Vol % of a Sm2M17 phase, wherein R is at least one of the group consisting of Ce, La, Nd, Pr, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yt, Lu and Y, and M comprises Co, Fe, Cu and Zr. In an area of the R2M17 sintered magnet of 200 by 200 μm viewed in a Kerr micrograph, an areal proportion of demagnetised regions after application of an internal opposing field of 1200 kA/m is less than 5% or less than 2%.
Claims10
A sintered R2M17 magnet, comprising:
- at least 70 vol % of a R2M17 phase, wherein R is at least one selected from the group consisting of Ce, La, Nd, Pr, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yt, Lu and Y, and M comprises Co, Fe, Cu and Zr, wherein, in an area of the R2M17 sintered magnet of ≥200 by 200 μm viewed in a Kerr micrograph, an areal proportion of demagnetised regions after application of an internal opposing field of 1200 kA/m is less than 5%.
Dependencies are inferred from the claim text.