The boride is dispersed in, or present in the form of a film over, the grain boundary to cover the surface of the crystal grains of the R2T14Q type compound at least partially.
Further, a crystal grain boundary phase of M or M alloy is formed in the boundary of Nd2Fe14B crystal grains so that the interface of the M or M alloy phase is in contact with the (Nd, M)2Fe14B crystal.
For the purpose of enhancing the corrosion resistance of the grain boundery, Zr and/or B may be incorporated to a content of 0.001-2%.
Requêtes fréquentes français :1-200, -1k, -2k, -3k, -4k, -5k, -7k, -10k, -20k, -40k, -100k, -200k, -500k, -1000k,
Requêtes fréquentes anglais :1-200, -1k, -2k, -3k, -4k, -5k, -7k, -10k, -20k, -40k, -100k, -200k, -500k, -1000k,
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