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2021-04-15T09:23:17Z urn:hdl:10259/5710 Non-monotonic variation of the grain size in Cu nanopowders subjected to ball milling Lasio, Barbara Pia, Giorgio Garroni, Sebastiano Orrù, Roberto Takacs, Laszlo Delogu, Francesco Ball milling Metals and alloys Microstructure Kinetics Ball milling (BM) a Cu nanopowder resulted in an increase of the average grain size from 8 to 52 nm, followed by a gradual decrease to 19 nm. In contrast, the grain size of coarse-grained Cu decreased monotonically from 290 nm to 19 nm. Fitting a model to the kinetic curves indicates that the two processes have similar activated volumes during collisions. It also reveals that particles over 100 nm are formed when nanoparticles are compressed during a collision for the first time. 2021-04-15T09:23:17Z 2021-04-15T09:23:17Z 2018-02 info:eu-repo/semantics/article 0167-577X http://hdl.handle.net/10259/5710 10.1016/j.matlet.2017.10.077 eng Materials Letters. 2018, V. 212, p. 171-173 https://doi.org/10.1016/j.matlet.2017.10.077 info:eu-repo/grantAgreement/EC/H2020/CA15102 http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess Attribution-NonCommercial-NoDerivatives 4.0 Internacional Elsevier