THE EFFECT OF INTERFACIAL DIFFUSION-BARRIERS ON THE IGNITION OF SELF-SUSTAINED REACTIONS IN METAL-METAL DIFFUSION COUPLES

被引:39
作者
ATZMON, M
机构
[1] Department of Nuclear Engineering, University of Michigan, Ann Arbor, 48109-2104, MI
来源
METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 1992年 / 23卷 / 01期
关键词
D O I
10.1007/BF02660850
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
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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页码:49 / 53
页数:5
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