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Título: | Effects of the speed ratio on the efficiency of planetary mills |
Autor: | Real, Concepción CSIC ORCID; Gotor, F.J. CSIC ORCID | Fecha de publicación: | 2019 | Editor: | Elsevier | Citación: | Helyon, 5(2): e01227 (2019) | Resumen: | The ignition time (tig) of the mechanically induced self-sustaining reaction (MSR) process involving the formation of TiB2 from Ti/2B elemental mixtures was used to study the influence of the ratio (k = -ωv/ωd) between the rotational speed of the supporting disc (ωd) and vials (ωv) on the milling efficiency of a Pulverisette 4 planetary mill. The variation of the inverse of the ignition time (1/tig), which is directly related to the milling power provided by the planetary mill, with the process conditions has shown that it is not possible to find a single k value as optimal independently of the experimental conditions used (ωd and the ball-to-powder ratio, BPR). Moreover, it was observed that the lowest milling efficiency (longer tig values) was found for k = 1, which is the usual value employed in routine laboratory works. The best efficiencies were found for the larger k values (2.5 or 3). At lower ωd, the shortest tig was obtained for k = 2.5 and at higher ωd for k = 3, independently of BPR. | Versión del editor: | http://doi.org/10.1016/j.heliyon.2019.e01227 | URI: | http://hdl.handle.net/10261/176648 | DOI: | 10.1016/j.heliyon.2019.e01227 |
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