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Your search keyword '"Yu. A. Velikodnyi"' showing total 2 results
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2 results on '"Yu. A. Velikodnyi"'

1. Stability of hexagonal modification of fullerite C60

Author

M.M. Nikulin, D.E. Izotov, Yu. A. Velikodnyi, E.V. Skokan, I.V. Arkhangelskii, and N.V. Chelovskaya

Subjects
Crystallography, Materials science, Fullerene, Hexagonal crystal system, Hydrostatic pressure, General Materials Science, General Chemistry, Deformation (engineering), Composite material, Uniaxial load, Compression (physics), Stability (probability), Grinding
Abstract

Stability of the hcp modification of fullerite C60 under heating, compression, and mechanical grinding was studied. It was established that uniaxial load and mechanical grinding caused transition of the hcp modification into more stable fcc modification, while no transition was observed upon heating or hydrostatic pressure. The results were discussed in terms of the theory of the deformation of solids.

Published
2005
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2. Synthesis of a hexagonal modification of C60 using cryoextraction

Author

N.B. Tamm, N.V. Chelovskaya, I.V. Arkhangelskii, E.V. Skokan, Yu. A. Velikodnyi, and N.A. Zhukova

Subjects
Diffraction, Fullerene, General Chemistry, law.invention, Hexane, Thermogravimetry, chemistry.chemical_compound, Crystallography, chemistry, Cryoextraction, law, Phase (matter), General Materials Science, Solvent effects, Crystallization
Abstract

Samples of the hexagonal close-packed phase (h.c.p.) of fullerite C 60 with a low (less then 7%) content of more stable face-centered cubic (f.c.c.) phase were synthesized using cryoextraction with n -hexane. X-Ray diffraction analysis and thermogravimetry were applied for characterization of the samples. The role of n -hexane in the formation of the h.c.p. structure is discussed.

Published
2003
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