Metallization systems at pulse current influence. Phase transitions in the conditions of thermal shock

Phase transitions of the first sort in aluminum metallization when passing through it single rectangular impulses of current with an amplitude up to 8.10¹⁰ A/m² and lasting 100-1000 μs are considered. Processes of formation of the local melted-off zones, and also their subsequent migration in the course of current course are experimentally studied. The main mechanisms of movement of interphase border (at the expense of a thermal emission on limit of the section of firm and liquid phases) in the conditions of non-stationary heating of a metal film are revealed. Speeds of distribution of a liquid phase along a metallization path (~ 25 m/s) are experimentally determined, and also the technique, allowing to count length of the melted-off zone after impulse passing is offered. Work is performed with support of grants of the Russian Fond Basic Research No 12-07-00620-a and No 14-07-0086914-a, as project No 2014/85 (a project code 2290).