2005
DOI: 10.1109/tmag.2005.854874
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Magnetic properties of extremely small Nd-Fe-B sintered magnets

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Cited by 273 publications
(78 citation statements)
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“…Dy or Tb atoms diffuse along the grain boundary phase during post-sinter heat treatment at temperature higher than melting point of rare-earth rich (RE-rich) phase but lower than sintering temperature. [20][21][22] H cj can be raised up to 4 ∼ 5 kOe without obvious reduction of B r . Moreover, the composition of Dy or Tb is much lower than those in conventional alloying process, which may reduce magnet cost dramatically.…”
Section: Introductionmentioning
confidence: 98%
“…Dy or Tb atoms diffuse along the grain boundary phase during post-sinter heat treatment at temperature higher than melting point of rare-earth rich (RE-rich) phase but lower than sintering temperature. [20][21][22] H cj can be raised up to 4 ∼ 5 kOe without obvious reduction of B r . Moreover, the composition of Dy or Tb is much lower than those in conventional alloying process, which may reduce magnet cost dramatically.…”
Section: Introductionmentioning
confidence: 98%
“…[1][2][3] Common approach for enhancing coercivity in the Nd-Fe-B-type magnet is grain boundary diffusion (GBD) technique. [4][5][6][7][8] For GBD, magnet is coated with heavy rare earth source (DyF 3 , TbF 3 ) and annealed, leading to substitution of some Nd atoms near the surface of Nd 2 Fe 14 B grains by the heavy rare earth, hence enhancing coercivity. 9,10 The same is anticipated to be possible for the Nd-Fe-B-type powder.…”
Section: Introductionmentioning
confidence: 99%
“…High performance Nd-Fe-B-type bonded micro-magnets have increasingly found new applications, such as the magnet in micro-motor and the like [1][2][3]. For preparation of the high performance bonded micro-magnet, fine NdFe-B-type anisotropic particles are required and they need to maintain the high permanent magnetic performance even when they are processed to fine particles.…”
Section: Introductionmentioning
confidence: 99%