Conclusions
During the comminution of powders of the ferrite BaFe12O19 in an attritor mechanical energy is expended in the disintegration of particles, formation of defects, and plastic deformation of the crystal lattice. The comminution of powders in a vibratory mill is accompanied by the formation of well-developed surface layers on particles, which are characterized by a high degree of defectiveness and crystal lattice disorder. The hypothesis is advanced that during prolonged comminution of powders in a vibratory mill the surface layers of particles can undergo structural transformations, which promote the formation of stable oxygen-containing phases at crystallite boundaries.
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Translated from Poroshkovaya Metallurgiya, No. 6(258), pp. 50–55, June, 1984.
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Shipko, M.N., Tikhonov, V.S. & Letyuk, L.M. Structural transformations taking place in the surface layers of very fine BaFe12O19 powder particles. Powder Metall Met Ceram 23, 466–470 (1984). https://doi.org/10.1007/BF00794670
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DOI: https://doi.org/10.1007/BF00794670