Fragmentation by high velocity impact on a target: a material grindability test

Abstract : An experimental test rig for the study of impact in an air jet mill (up to 500 m s(-1)) allows the evaluation of the relationship between the impact energy and the fineness of the impacted solids. In single impact tests, so far, three types of behaviour are found: brittle (for glass, sand, polyamide and NaCl), ``complex'' (for Al(OH)(3)) and ductile (for PMMA). A classification is obtained from the definition of grindability parameters. A multi-impact study reveals the non-equivalence between multiple impact and single impact: a solid is not broken similarly if a given total energy is provided in one or several impacts.
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Olivier Lecoq, N Chouteau, M Mebtoul, Jf Large, P Guigon. Fragmentation by high velocity impact on a target: a material grindability test. Powder Technology, Elsevier, 2003, 133 (1-3), pp.113-124. ⟨10.1016/S0032-5910(03)00085-8⟩. ⟨hal-01697284⟩

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