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NANOSYSTEMS: PHYSICS, CHEMISTRY, MATHEMATICS, 2016, 7 (1), P. 198–203

Modification of the mechanical properties of zirconium dioxide ceramics by means of multiwalled carbon nanotubes

E. A. Lyapunova – Institute of Continuous Media Mechanics, Ural Branch of Russian Academy of Sciences, Perm; Ural Federal University, Ekaterinburg, Russia; lyapunova@icmm.ru
S.V. Uvarov – Institute of Continuous Media Mechanics, Ural Branch of Russian Academy of Sciences, Perm, Russia
M.V. Grigoriev – Institute of Strength Physics and Materials Science, Siberian Branch of Russian Academy of Sciences, Tomsk, Russia
S. N. Kulkov – Institute of Strength Physics and Materials Science, Siberian Branch of Russian Academy of Sciences; Tomsk Polytechnic University, Tomsk, Russia
O. B. Naimark – Institute of Continuous Media Mechanics, Ural Branch of Russian Academy of Sciences, Perm, Russia

A ceramic matrix composite based on zirconium dioxide doped with carbon nanotubes (CNTs) and metallic silver as a plastic binder was produced by hydrothermal synthesis from ceramic precursor and a CNTs suspension followed by critical point drying of the synthesized hydrogel and metallic silver deposition on ceramic composite aerogel fragments from a AgNO3 solution. Multi-indentation loading of the composite has revealed two types of mechanical response: 1) hardness decreasing with an increasing of number of cycles and 2) significant increasing of hardness with an increasing number of indentations. Local chemical composition analysis has revealed correlations between the composite hardness and the presence oxygen atoms for first type and silver and yttrium atoms for second type of mechanical response respectively.

Keywords: carbon nanotubes, zirconium dioxide, hydrothermal synthesis, aerogel, nanoindentation.

PACS 62.23.Pq, 62.20.Qp, 63.22.Gh

DOI 10.17586/2220-8054-2016-7-1-198-203

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