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Based on the density function theory, thermite reaction between Al and α-Fe 2 O 3 at temperature 2000 K in canonical ensemble is investigated by ab initio molecular dynamics. In the simulation, with the increasing of the time, the number of the Fe-O bond decreases, while the numbers of Al-O bonds and Fe-Fe bonds increase. At the same time, the total charge quantity of Fe ions decreases and the total charge quantity of Al ions increases as time increases. In the Al/Fe 2 O 3 thermite reaction, the redox reaction is observed, Al atoms are oxidized and the Fe ions are reduced. And then the rupture of Fe-O bonds and the formation of Al-O bonds happen at the interface. Whole redox reaction is completed in about 3 ps. © Chinese Physical Society.

Original publication

DOI

10.7498/aps.62.247101

Type

Journal article

Journal

Wuli Xuebao/Acta Physica Sinica

Publication Date

01/12/2013

Volume

62