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Limits of grain boundary engineering in nanocrystalline Nd-Fe-B melt-spun ribbons
Materials Letters ( IF 3 ) Pub Date : 2020-04-01 , DOI: 10.1016/j.matlet.2020.127338
Marko Soderžnik , Bojan Ambrožič , Kristina Žagar Soderžnik , Matic Korent

Abstract Grain boundaries in rapidly quenched Nd-Fe-B melt-spun ribbons are of major importance for achieving superior coercivity. Using the so-called grain boundary diffusion process (GBDP) initiated by the electrophoretic deposition (EPD) of DyF3, we have improved the coercivity for 8%, while the remanence remained almost unchanged. Coercivity-improvement is attributed to higher magnetocrystalline anisotropy of Dy-rich regions, which were detected in outer parts of the Nd–Fe–B grains. Electron microscopy study revealed significant limitation hindering the diffusion efficiency; thin and dry grain-boundaries.

中文翻译:

纳米晶 Nd-Fe-B 熔纺带中晶界工程的局限性

摘要 快速淬火 Nd-Fe-B 熔纺薄带中的晶界对于获得优异的矫顽力至关重要。使用由 DyF3 的电泳沉积 (EPD) 引发的所谓晶界扩散工艺 (GBDP),我们将矫顽力提高了 8%,而剩磁几乎保持不变。矫顽力的提高归因于在 Nd-Fe-B 晶粒外部检测到的富 Dy 区域具有更高的磁晶各向异性。电子显微镜研究揭示了阻碍扩散效率的显着限制;薄而干燥的晶界。
更新日期:2020-04-01
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