Importance

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Abstract

Disclosed are an anisotropic nanocrystalline rare earth permanent magnet and a preparation method thereof. The rare earth permanent magnet includes an RE—Fe—B matrix phase and a second phase, wherein the RE—Fe—B matrix phase includes main phase RE₂Fe₁₄B flaky nanocrystallines regularly arranged and an RE-rich phase around main phase grains, the main phase RE₂Fe₁₄B flaky nanocrystallines having an average grain size in a length direction of 70 nm to 800 nm and an average grain size in a thickness direction of 30 nm to 200 nm; and the second phase includes at least one selected from the group consisting of an M-Cu phase and an M—Cu—O phase, M being at least one selected from the group consisting of Ca and Mg.

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First Claim