G. S. Bezruchkoa*, S. V. Razorenova, and M. Yu. Popovb
a Institute of Problems of Chemical Physics, Russian Academy of Sciences,
pr. Akademika Semenova 1, Chernogolovka, Moscow oblast, 142432 Russia
b Technological Institute for Superhard and Novel Carbon Materials, Tsentral’naya ul. 7a, Troitsk, Moscow, 142190 Russia
*e-mail: bezgs@ficp.ac.ru
Received April 10, 2013
Abstract—The Hugoniot elastic limit and the spall strength of aluminum and copper samples pressed from a
mixture of a metallic powder and 2–5 wt % C60 fullerene powder are measured under a shock loading pressure
up to 6 GPa and a strain rate of 105 s–1 by recording and analyzing full wave profiles using a VISAR laser inter-
ferometer. It is shown that a 5% C60 fullerene addition to an initial aluminum sample leads to an increase in its
Hugoniot elastic limit by an order of magnitude. Mixture copper samples with 2% fullerene also exhibit a mul-
tiple increase in the elastic limit as compared to commercial-grade copper. The elastic limits calculated from
the wave profiles are 0.82–1.56 GPa for aluminum samples and 1.35–3.46 GPa for copper samples depending
on the sample porosity. The spall strength of both aluminum and copper samples with fullerene additions
decreases approximately threefold because of the effect of high-hardness fullerene particles, which serve as ten-
sile stress concentrators in a material under dynamic fracture.
10.1134/S1063784214030062
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