Development of TbCu7-type Sm-Fe-N anisotropic magnet powder and its sintered magnets
Source abstract
Abstract
Anisotropic TbCu 7-type Sm-Fe-N magnet powder and its sintered magnets were developed using TbCu 7 -type Sm-Fe alloy powder synthesized by a modified low-temperature reduction diffusion process. Using Sm metal powder instead of SmCl 3 and Ca and using the eutectic salt LiCl-CaCl 2 to lower the synthesis temperature, an almost single-phase TbCu 7-type Sm-Fe powder was obtained. By nitriding the powder with an NH 3-H 2 mixture gas, a TbCu 7 -type Sm-Fe-N anisotropic magnet powder was demonstrated for the first time. Furthermore, by sintering the anisotropic powder with a high-pressure current sintering process, a TbCu 7-type Sm-Fe-N anisotropic sintered magnet with a relative density of 86.8% was produced. The magnetization ratio σ r/σ 90 kOe was decreased by the formation of the α-Fe phase as a result of the decomposition of the TbCu 7 -type Sm-Fe-N phase in the sintering process, whereas the coercivity was slightly increased. This result indicates that the TbCu 7-type Sm-Fe-N magnet is less affected by the existence of α-Fe compared with a Sm 2Fe 17N 3 magnet.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Magnetic Properties of Alloys · Magnetic properties of thin films · Magnetic Properties and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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