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Characterization of Nitinol Powder Produced by Reduction of Oxides by Calcium Hydride

100%

Sviridova T., Shuytcev A., Kasimtcev A., Markova G.

Acta Physica Polonica A

2015

vol. 128

issue 4

510-513

Several techniques were used to investigate the chemical and phase composition of four trial batches of nitinol powder produced by calciothermic reduction as well as their morphology and granulometric composition. Almost all powders produced by a similar procedure contained an allowable amount of impurities and were practically free of minor detrimental phases such as Ti₂Ni and Ni₃Ti. The powders under study have gamma or lognormal particle size distributions and spongy particles morphology typical of this production method. The tap density over 3g/cm³ was achieved at least in one case, which gives us an opportunity to successfully produce bulk articles by subsequent treatments such as sintering or hot isostatic pressing.

Fabrication and Study of GdMnO_{3} Multiferroic Thin Films

76%

Andreev N., Abramov N., Chichkov V., Pestun A., Sviridova T., Mukovskii Y.

issue 1

218-220

Laboratory technology of GdMnO_{3} thin film fabrication was elaborated. Samples of GdMnO_{3} were fabricated at NdGaO_{3} substrate by magnetron sputtering using off-axis scheme. Structure and phase content of the samples obtained were studied as well as their magnetic properties. The surface topography of the films was observed by atomic force microscopy. Presence of peculiarities at the temperature dependences of magnetic susceptibility points at magnetic phase transitions in GdMnO_{3}, which were found before in the single crystals. This fact jointly with X-ray data shows that at definite fabrication regimes one can obtain the multiferroics thin film GdMnO_{3} modification, and the film quality permits to carry out accurate study of the compound in question.

Nanoquasicrystalline Phase in Mechanically Alloyed and Heat-Treated Al_{73}Cu_{11}Cr_{16}

64%

Sviridova T., Shevchukov A., Shelekhov E., Diakonov D., Gorshenkov M., Kaloshkin S., Tcherdyntsev V., Li Z., Fan G.

vol. 126

issue 2

599-602

X-ray diffraction analysis, scanning and transmission electron microscopy, thermal analysis and measurement of chemical composition were implemented to determine structure, thermal stability and chemical composition of the decagonal quasicrystal in Al_{73}Cu_{11}Cr_{16} alloy produced by long-term mechanical alloying of elemental powders followed by annealing at 700°C. According to the TEM investigation such a technique permits to produce a single-phase nanostructural quasicrystal with grain size about 60 nm. Differential thermal analysis revealed that the decagonal phase does not exist above 923°C and undergoes incongruent two-stage melting coming to the end at 1100°C.

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3 Acta Physica Polonica A

1 2015

1 2014

1 2010

3 Sviridova T.

1 Abramov N.

1 Andreev N.

1 Chichkov V.

1 Diakonov D.

1 Fan G.

1 Gorshenkov M.

1 Kaloshkin S.

1 Kasimtcev A.

1 Li Z.

1 Markova G.

1 Mukovskii Y.

1 Pestun A.

1 Shelekhov E.

1 Shevchukov A.

1 Shuytcev A.

1 Tcherdyntsev V.

Search results

Characterization of Nitinol Powder Produced by Reduction of Oxides by Calcium Hydride

Fabrication and Study of GdMnO_{3} Multiferroic Thin Films

Nanoquasicrystalline Phase in Mechanically Alloyed and Heat-Treated Al_{73}Cu_{11}Cr_{16}