Phase transformations in copper cumulative jet penetrating into silicon carbide

B. V. Rumyantsev^abc, V. Yu. Klimenko<sup>abc

a</sup> Ioffe Institute, St. Petersburg
^b N. N. Semenov Institute of Chemical Physics, Russian Academy of Sciences, Moscow
^c High Pressures Company, Moscow, Russia

Abstract: The penetration of a cumulative jet (CJ) of copper into a silicon carbide (SiC) obstacle has been experimentally studied and numerically simulated. In contrast to the case of high-strength dense metal targets, the CJ incorporation into a ceramic material exhibits an anomalous character and has a lower penetration depth. Analysis of the experimental and numerical results shows that the CJ penetration into ceramic materials is complicated by the radial interaction between fragments of the cavity walls and CJ flux, which leads to melting and partial evaporation of the jet elements. The appearance of this “gas” phase favors dispersion of the jet elements, their mixing with fragments of the cavity walls, formation of an internal absorption volume, and destabilization of the subsequent jet flow. As a result, a significant part of the CJ loses the ability to penetrate into the target.

Received: 23.06.2011

 English version: Technical Physics Letters, 2011, 37:11, 1030–1033

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