R-T-B system rare earth permanent magnet

Details R-T-B system rare earth permanent magnet R-T-B system rare earth permanent magnet

2008-01-01

2008-01-01

Sheehan, John P. (Department: 1742)

Metal treatment

Stock

Magnetic

C075S244000

Reexamination Certificate

active

07314531

ABSTRACT:
A sintered body comprising a main phase consisting of an R2T14B phase (wherein R represents one or more rare earth elements (providing that the rare earth elements include Y), and T represents one or more transition metal elements essentially containing Fe, or Fe and Co), and a grain boundary phase containing a higher amount of R than the main phase, wherein a platy or acicular product exists. This sintered body enables to inhibit the grain growth, while keeping a decrease in magnetic properties to a minimum, and to improve a suitable sintering temperature range.

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