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539.21 (53) |
Proprietăţile şi structura sistemelor moleculare (224) |
SM ISO690:2012 GRABCO, Daria, PYRTSAC, Constantin, ŞIKIMAKA, Olga. Relaxation parameters of Cu/substrate coated systems. In: Materials Science and Condensed Matter Physics, Ed. 9, 25-28 septembrie 2018, Chișinău. Chișinău, Republica Moldova: Institutul de Fizică Aplicată, 2018, Ediția 9, p. 162. |
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Materials Science and Condensed Matter Physics Ediția 9, 2018 |
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Conferința "International Conference on Materials Science and Condensed Matter Physics" 9, Chișinău, Moldova, 25-28 septembrie 2018 | ||||||
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CZU: 539.21 | ||||||
Pag. 162-162 | ||||||
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In recent years, special attention has been paid to the development and fabrication of new materials, in particular to the coated systems (CS) [1, 2]. From a practical point of view, the relaxation processes under nanoindentation in the film/substrate CS are of a major interest and are studied in present paper. These parameters need to be considered in lithographic technologies that use printing (penetration of resist-marking with a nanometric scale model), recording and storing information by nanoindentation methods in nanomechanical systems. The parameters characterizing the elasto-plastic recovery, he-p, and the residual plastic deformation, hres, are presented in Fig. 1 in dependence on the applied load for a set of CS, namely: Cu/LiF (soft-on-soft, SS), Cu/MgO, Cu/Si (soft-on-hard, SH) and for the bulk materials (Cu, LiF, MgO and Si). It can be seen that the he-p parameters change depending on the CS type and the thickness of the film. In the SS type of CS, the residual depth hres is virtually similar to all dependencies besides the polycrystalline Cu (Fig. 1d), whereas the elasto-plastic recovery he-p (Fig. 1a) only at low and medium loads up to P≈400 mN is equal to all samples. At high loads he-p increases for CS compared to Cu and LiF. The difference is also evident in the SH coated systems. The deviation of the Cu curve from the other curves is observed for both parameters even from the smallest loads: the minimal elasto-plastic recovery (Fig. 1b, c) and the highest residual depth (Fig. 1e, f). The he-p and hres curves are close to those of the crystal-substrate, thereby exhibiting the visible influence of the substrate on the mechanical behavior of the soft-on-hard type CS. |
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