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- Title
Macrokinetic Analysis of Passivation of Pyrophoric Powders.
- Authors
Seplyarskii, B. S.; Ivleva, T. P.; Alymov, M. I.
- Abstract
A model of ignition and passivation of a layer of a pyrophoric nanopowder was proposed and studied by analytical and numerical methods. Under the assumption that the passivation wave propagation is controlled by the oxidant diffusion, the dependence of the maximum nanopowder temperature on governing parameters was characterized. Passivation was proposed to be performed in two stages with increasing oxidant concentration in the gas phase, which makes it possible to reach the complete passivation of a sample several times faster at permissible temperature rise and opens up new opportunities for improving nanopowder production performance.
- Subjects
PASSIVATION; PYROPHORICITY; PASSIVE metals; PASSIVE states; PASSIVITY (Chemistry)
- Publication
Doklady Physical Chemistry, 2018, Vol 478, Issue 1, p23
- ISSN
0012-5016
- Publication type
Article
- DOI
10.1134/S0012501618010062