Abstract

The particles of ultrafine iron powders obtained by three different methods (electrolytic deposition, reduction in hydrogen flow, and grinding in a planetary ball mill in heptane medium) were studied by the atomic force microscopy and the results were compared with the data of electron microscopy and X-ray diffraction analysis. The shape and size of particles were determined from three-dimensional images obtained by atomic force microscopy, and the grain structure of the particle surface layer was studied by measuring the lateral friction forces.

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