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The effect of interfacial diffusion barriers on the ignition of self-sustained reactions in metal-metal diffusion couples

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Abstract

An analysis of the solid-state diffusion process leading to exothermic, self-sustained reactions in metal-metal diffusion couples has been performed. Numerical values for the ignition temperature were obtained as a function of interfacial barriers, layer thickness, thermal coupling, and heating rate for isochronal heating of Al-Ni diffusion couples. Of particular interest is the effect of interfacial diffusion barriers, such as oxide layers, on the reaction. These are shown to lead to self-sustained reactions when otherwise not possible and to explain the heating-rate dependence of the ignition temperature observed in experiments.

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Authors and Affiliations

  1. Department of Nuclear Engineering, University of Michigan, 48109-2104, Ann Arbor, MI

    M. Atzmon (Assistant Professor)

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  1. M. Atzmon
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Additional information

This paper is based on a presentation made in the symposium “Reaction Synthesis of Materials” presented during the TMS Annual Meeting, New Orleans, LA, February 17–21, 1991, under the auspices of the TMS Powder Metallurgy Committee.

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Atzmon, M. The effect of interfacial diffusion barriers on the ignition of self-sustained reactions in metal-metal diffusion couples. Metall Trans A 23, 49–53 (1992). https://doi.org/10.1007/BF02660850

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