Investigation into the dependence of time characteristics of ignition and combustion of iron nanopowders on air on the duration of passivation after synthesis


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Abstract

A method of estimating the extent of passivation of iron nanopowders based on color high-speed filming is suggested. It is established that the number of primary centers of combustion and the time of their emergence depend on the passivation time: the more the passivation time is, the lower the number of primary centers of combustion is. This allows using the dependence for estimating both the extent of passivation and the minimum time of complete passivation. A method for calculating the time of complete passivation for the sample of arbitrary thickness is suggested.

About the authors

M. I. Alymov

Institute of Structural Macrokinetics and Problems of Materials Sciences

Author for correspondence.
Email: alymov@ism.ac.ru
Russian Federation, Chernogolovka, 142432

N. M. Rubtsov

Institute of Structural Macrokinetics and Problems of Materials Sciences

Email: alymov@ism.ac.ru
Russian Federation, Chernogolovka, 142432

B. S. Seplyarskii

Institute of Structural Macrokinetics and Problems of Materials Sciences

Email: alymov@ism.ac.ru
Russian Federation, Chernogolovka, 142432

V. A. Zelenskii

Institute of Structural Macrokinetics and Problems of Materials Sciences; Baikov Institute of Metallurgy and Materials Science

Email: alymov@ism.ac.ru
Russian Federation, Chernogolovka, 142432; Moscow, 119991

A. B. Ankudinov

Baikov Institute of Metallurgy and Materials Science

Email: alymov@ism.ac.ru
Russian Federation, Moscow, 119991

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