Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1498304 | Scripta Materialia | 2014 | 4 Pages |
Abstract
The application of expansion constraint during the grain-boundary diffusion process using Nd70Cu30 eutectic alloy minimizes the remanence loss for the coercivity enhancement by optimizing the volume fraction of the Nd(Cu)-rich non-ferromagnetic intergranular layer. The diffusion-processed sample exhibits μ0Hc ∼ 2 T, μ0Mr = 1.36 T and (BH)max = 358 kJ m−3 at room temperature. Because of the low-temperature coefficient of coercivity, the magnet showed (BH)max ∼ 191 kJ m−3 at 200 °C, which is superior to that of Dy-containing high-coercivity sintered magnets.
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Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
T. Akiya, J. Liu, H. Sepehri-Amin, T. Ohkubo, K. Hioki, A. Hattori, K. Hono,