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Molecular Dynamics studies in nano-joining: self-propagating reaction in Ni/Al nanocomposites

Abstract : Reactive joining with Ni/Al nanocomposites is an innovative technology that provides an alternative to more common bonding techniques. This work focuses on a class of energetic material, produced by high energy ball milling and cold rolling. The initial microstructure is more complex than that of reactive multilayer nanofoils, produced by magnetron sputtering, in which the bilayer thickness is constant. Typical samples are composed of reactive nanocomposite particles that are numerically modelized by randomly distributed layered grains. The self-propagating reaction was studied by means of Molecular Dynamics simulations. We determined the front characteristics and investigated the elemental mechanics that trigger propagation. Both dissolution of Ni in amorphous Al and sustained crystallization of the B2-NiAl intermetallic compound were found to contribute to the heat delivered during the process.
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https://hal.archives-ouvertes.fr/hal-03347476
Contributor : Florence Baras Connect in order to contact the contributor
Submitted on : Friday, September 17, 2021 - 11:28:41 AM
Last modification on : Saturday, September 18, 2021 - 3:22:02 AM

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O. Politano, A. Rogachev, Florence Baras. Molecular Dynamics studies in nano-joining: self-propagating reaction in Ni/Al nanocomposites. Journal of Materials Engineering and Performance, Springer Verlag/ASM International, 2021, 30 (5), pp.3160-3166. ⟨10.1007/s11665-021-05520-x⟩. ⟨hal-03347476⟩

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