high-energy ball milling
(rus. размол механический высокоэнергетический)
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a process of grinding solids, which is used to obtain nanopowders with an average particle size of less than 100 nm.
Description
High-energy ball milling is a simple, effective and productive way to produce various nanocrystal powders in high-energy planetary, ball and vibratory mills. Other things being equal, the higher the intensity and duration of grinding and the smaller the weight and size of particles of milled source powder, the smaller the average size of the powder particles. Along with decreasing particle size, grinding produces microdeformation of the crystal lattice of the ground material, and part of the energy is spent to create microstresses, which slows down the grinding of the powder. The finest grinding is achieved using a liquid milling medium (alcohol, other organic solvents).
Illustrations
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Above — original coarse-grain wolfram carbide WC powder with mean particle size of 5 um. Below — agglomerated WC nanopowder after 10 hours of milling with mean nanoparticle size of 50 nm. On the right — dependence of mean particle size D and microstrains ε on the duration t of milling of the original WC powder. |
Author
- Gusev Alexander I.
Sources
- Gusev A. I. Nanomaterials, Nanostructures, and Nanotechnologies (in Russian) // Fizmatlit, Moscow (2007) - 416 pp.
- Gusev A. I., Kurlov A. S. Production of nanocrystalline powders by high-energy ball milling: model and experiment // Nanotechnology. 2008. V. 19, №26. Paper 265 302.