Mechanical properties of composites based on (Cu<sub>1−x</sub>Ag<sub>x</sub>)<sub>7</sub>GeSe<sub>5</sub>I mixed crystals
DOI:
https://doi.org/10.24144/2415-8038.2019.46.76-83Keywords:
Composites, Mixed crystals, MicrohardnessAbstract
Purpose. The purpouse of the present work is to investigate a mechanical properties of composites based on polymer matrix and superionic compounds (Cu1−xAgx)7GeSe5I, to perform a comparative analysis with similar properties of 81 Uzhhorod University Scientific Herald. Series Physics. Issue 46. — 2019 a single crystals and to study changes of structural rigidity, which depend on concetration ratio of polymer and microcrystalline components.
Methods. The сomposites were prepared by pressing a mixture of micropowder and polymer. Investigations of their mechanical properties were performed using microindentation test. An indentation was performed by Vickers indenter. For imprints analysis interferential microscope MII–4 was used.
Results. The dependence of microhardness versus concetration ratio of micropowder and polymer has been analyzed. The relative contributions of elastic and plastic deformation components for Cu7GeSe5I single crystal, composite based on it, and ethylyne-vinyl acetate polymer have been calculated and compared. The decreasing of composites’ microhardness at Cu+→Ag+ isovalent cation substitution has been revealed.
Conclusions. The microhardness numerical values of composites based on polymer and superionic micropowder were calculated. It has been founded, that at concentration of microcrystals increase up to 90 wt.%, the mechanical rigidity crossover ”soft-rigid structure” is observed. It has been shown, that with different component concentration the deformation mechanism changes: elastic in polymer, plastic in composites and elasto-plastic in superionic crystals. The microhardness of composites at Cu+→Ag+ cation substitution, decreases.
References
Kuhs W.F. The argyrodites — a new family of the tetrahedrally close-packed srtuctures / W.F. Kuhs, R. Nitsche, K. Scheunemann // Mater. Res. Bull. — 1979. — V. 14. — P. 241 – 248.
Nilges T. A structural differentiation of quaternary copper argirodites: Structure - property relations of high temperature ion conductors / T. Nilges, A. Pfitzner // Z. Kristallogr. — 2005. — V. 220. — P. 281 – 294.
Laqibi M. New silver superionic conductors Ag7XY5Z (X = Si, Ge, Sn; Y = S, Se; Z = Cl, Br, I) — synthesis and electrical studies / M. Laqibi, B. Cros, S. Peytavin, M. Ribes // Solid State Ionics — 1987. — V. 23. — P. 21 – 26
Zerouale A. Electrical properties of Ag7GeSe5I / A. Zerouale, B. Cros, B. Deroide, M. Ribes // Solid State Ionics — 1988. V. 28-30 — P. 1317 – 1318.
Belin R. Ion dynamics in the argyrodite compound Ag7GeSe5I: non-Arrhenius behavior and complete conductivity spectra / R. Belin, A. Zerouale, A. Pradel, M. Ribes // Solid State Ionics — 2001. — V. 143 — P. 445 – 455.
Studenyak I.P. Temperature variation of electrical conductivity and absorption edge in Cu7GeSe5I advanced superionic conductor / I.P. Studenyak, M. Kranjčec, V.V. Bilanchuk , O.P. Kokhan, A.F. Orliukas, E. Kazakevicius, A. Kezionis, T. Salkus // J. Phys. Chem. Solids — 2009. Vol. — 70. —P. 1478 – 1481.
Studenyak I.P. Impedance studies and electrical conductivity of (Cu1−xAgx)7GeSe5 mixed crystals / I.P. Studenyak, A.I. Pogodin, M.M. Luchynets, V.I. Studenyak, O.P. Kokhan, P. Kúš // Journal of Alloys and Compounds — 2019.
Albert S. Disorder in Ag7GeSe5I, a superionic conductor: temperaturedependent anharmonic structural study / S. Albert, S. Pillet, C. Lecomte, A. Pradel, M. Ribes // Acta Crystallographica. Section B, Structural Science — 2008. V. 64 — P. 1 – 11.
Pogodin, A.I. Synthesis, growth and srtructural properties of (Cu1−xAgx)7GeSe5I solid solutions / A.I. Pogodin, M.M. Luchynets, M.Y. Filep, O.P. Kokhan, І.P. Studenyak, P. Kúš // Scientific Herald of Uzhhorod University: Ser. Physics — 2019. — V. 45 — P. 7 – 13. 8 Науковий вісник Ужгородського університету. Серія Фізика. Випуск 46. — 2019
Filho, P. Brinell and vickers hardness measurement using image processing and analysis techniques /P. Filho, T. Cavalcante, V. de Albuquerque, J. Tavares // Journal of Testing and Evaluation — 2010. V. 38(1) — P. 88 – 94.
Nabarro, F. R. N. The size effect in microindentation / F. R. N. Nabarro, S. Shrivastava, S. B. Luyckx // Phil. Magazine — 2006. — V. 86 — P. 4173 – 4180.
Trunov, M.L. Nanoindentation study of the time-dependent mechanical behavior of materials / M.L. Trunov, V.S. Bilanych, S.N. Dub // Tech. Phys. — 2007 — V. 52 — P. 1298 – 1305
Bilanych, V.V. Studying the mechanical properties of (Cu1–xAgx)7GeS5I mixed crystals by using the micro-indentation method / V.V. Bilanych, А.V. Bendak, K.V. Skubenych, A.I. Pogodin, V.S. Bilanych, I.P. Studenyak. // Semiconductor Physics, Quantum Electronics & Optoelectronics. — 2018 —V. 21(3) — P. 273 –276
House J.E. Inorganic chemistry (second edition) / J.E. House. — Elsevier, 2013. — 210p
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