title: Production of nanocrystalline powders by high-energy ball milling: model and experiment.
abstract: A model of high-energy ball milling of powders has been proposed. It is demonstrated that part of the energy is consumed for initiation of microstrains ε during milling and, hence, the process of the powder grinding is decelerated. An analytical expression has been deduced describing the size of nanocrystalline powder particles as a function of the milling time. The model and the experiment have been compared, using a powder of tungsten carbide (WC). The average size of the particles and the value of the microstrains in the ball-milled powder were determined by an x-ray method from broadening of diffraction reflections. The size of the particles was also evaluated using scanning electron microscopy and the sedimentation method.
authors.affiliation: Institute of Solid State Chemistry, Ural Division of the Russian Academy of Sciences, Ekaterinburg 620041, Russia.
authors.forename: A I
authors.initials: AI
authors.lastname: Gusev
authors.forename: A S
authors.initials: AS
authors.lastname: Kurlov