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1. Disordering in Pyridine at High Pressures [2019]

  • Gromnitskaya, E. L., Danilov, I. V., Kondrin, M. V., and Brazhkin, V. V.
  • JETP Letters. 110(9):603-606

2. Elastic properties of liquid and glassy propane-based alcohols under high pressure: the increasing role of hydrogen bonds in a homologous familyElectronic supplementary information (ESI) available: Method of processing of experimental data, parametrization of the necessary initial characteristics from the literature, additional pressure dependences of elastic properties, and comparison of the ultrasonic wave attenuation and dielectric loss at 10 MHz near the glass transition region. See DOI: 10.1039/c8cp07588c [2019]

  • Gromnitskaya, E. L., Danilov, I. V., Lyapin, A. G., and Brazhkin, V. V.
  • Physical chemistry chemical physics. 21(5):2665-2672

3. Dielectric Spectroscopy and Ultrasonic Study of Propylene Carbonate under Ultra-high Pressures [2013]

  • Kondrin, M. V., Gromnitskaya, E. L., Pronin, A. A., Lyapin, A. G., Brazhkin, V. V., and Volkov, A. A.
  • The Journal of Chemical Physics, 137(8), 084502, 2012
Subjects
Condensed Matter - Soft Condensed Matter
Abstract
We present the high pressure dielectric spectroscopy (up to 4.2 GPa) and ultrasonic study (up to 1.7 GPa) of liquid and glassy propylene carbonate (PC). Both of the methods provide complementary pictures of the glass transition in PC under pressure. No other relaxation processes except $\alpha$-relaxation have been found in the studied pressure interval. The propylene carbonate liquid is a glassformer where simple relaxation and the absence of $\beta$-relaxation are registered in the record-breaking ranges of pressures and densities. The equation of state of liquid PC was extended up to 1 GPa from ultrasonic measurements of bulk modulus and is in good accordance with the previous equations developed from volumetric data. We measured the bulk and shear moduli and Poisson's ratio of glassy PC up to 1.7 GPa. Many relaxation and elastic properties of PC can be qualitatively described by the soft-sphere or Lennard-Jones model. However, for the quantitative description of entire set of the experimental data, these models are insufficient. Moreover, the Poisson coefficient value for glassy PC indicates a significant contribution of non-central forces to the intermolecular potential. The well-known correlation between Poisson's ratio and fragility index (obtained from dielectric relaxation) is confirmed for PC at ambient pressure, but it is violated with pressure increase. This indicates that different features of the potential energy landscape are responsible for the evolution of dielectric response and elasticity with pressure increase.
Comment: minor corrections from published version

4. Pressure Dependences of Elastic Constants of AMg6 Aluminum–Magnesium Alloy and n-AMg6/С60 Nanocomposite Alloy [2018]

  • Prokhorov, V. M. and Gromnitskaya, E. L.
  • Physics of the Solid State. 60(4):769-773

5. Application of the dusty plasma method for preparation of diamond ceramics [2014]

  • EKIMOV, E. A, BOROVIKOV, N. F, IVANOV, A. S, PAL, A. F, RUSINKEVICH, A. A, RYABINKIN, A. N, SEROV, A. O, STAROSTIN, A. N, FORTOV, V. E, and GROMNITSKAYA, E. L
  • Diamond and related materials. 41:1-5
Subjects
Crystallography, Cristallographie cristallogenèse, Sciences exactes et technologie, Exact sciences and technology, Physique, Physics, Etat condense: structure, proprietes mecaniques et thermiques, Condensed matter: structure, mechanical and thermal properties, Surfaces et interfaces; couches minces et trichites (structure et propriétés non électroniques), Surfaces and interfaces; thin films and whiskers (structure and nonelectronic properties), Structure et morphologie de couches minces, Thin film structure and morphology, Structure et morphologie; épaisseur, Structure and morphology; thickness, Domaines interdisciplinaires: science des materiaux; rheologie, Cross-disciplinary physics: materials science; rheology, Science des matériaux, Materials science, Matériaux particuliers, Specific materials, Fullerènes et matériaux apparentés; diamants, graphite, Fullerenes and related materials; diamonds, graphite, Méthodes de dépôt de films et de revêtements; croissance de films et épitaxie, Methods of deposition of films and coatings; film growth and epitaxy, Depôt par pulvérisation cathodique, Deposition by sputtering, Cobalt, Diamant synthétique, Synthetic diamond, Diamante sintético, Dispersion, Dispersions, Dépôt physique phase vapeur, Physical vapor deposition, Dépôt pulvérisation, Sputter deposition, Frittage, Sintering, Matériau composite, Composite materials, Microstructure, Outil coupe, Cutting tools, Propagation onde, Wave propagation, Pulvérisation cathodique, Cathode sputtering, Pulvérisation irradiation, Sputtering, Revêtement, Coatings, 6855J, 8105T, 8105U, 8115C, Composites, and HTHP
Abstract
Diamond particles 3-7 μm in size sustained in plasma in a high-dispersion state were coated with cobalt by magnetron sputtering. The relative concentration of cobalt in obtained powders was 2-3 mass. %. Sintering the diamond powders with the cobalt coating under the pressure of 8 GPa and the temperatures of 2000-2100 K resulted in the production of homogeneous specimens having the density of 3.6 ± 0.1 g cm-3. The produced diamond compacts demonstrated high values of the ultrasonic wave propagation velocity and elastic moduli.

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7. Sintering, structure, and physicomechanical properties of Al-Cu-Fe quasicrystals compacted at high pressure [2014]

  • Ekimov, E. A., Sirotinkin, V. P., Petrzhik, M. I., and Gromnitskaya, E. L.
  • INORGANIC MATERIALS C/C OF IZVESTIIA- AKADEMIIA NAUK SSSR NEORGANICHESKIE MATERIALY. 50(1):52-57

8. Pressure Dependences of Elastic Constants of AMg6 Aluminum-Magnesium Alloy and n-AMg6/С60 Nanocomposite Alloy. [2018]

  • Prokhorov, V. M. and Gromnitskaya, E. L.
  • Physics of the Solid State. Apr2018, Vol. 60 Issue 4, p769-773. 5p.
Subjects
ALUMINUM-magnesium alloys, PRESSURE, NANOCOMPOSITE materials, HYDROSTATIC pressure, and ELASTIC constants
Abstract
The ultrasonic study results for dependence of the elastic wave velocities and second-order elasticity coefficients of the polycrystalline aluminum alloy AMg6 and its nanocomposite n-AMg6/C60 on hydrostatic pressure up to 1.6 GPa have been described. The ultrasonic research has been carried out using a highpressure ultrasonic piezometer based on the piston-cylinder device. The pressure derivatives of the secondorder elastic constants of these materials established in the present study have been compared with the results of the third-order elastic constants measurements of the test alloys using the Thurston-Brugger method. Involving available literature data, we determined the relationships between the pressure derivatives of the second-order elastic constants of the AMg6 alloy and the Mg-content and nanostructuring. [ABSTRACT FROM AUTHOR]

9. Elastic properties of carbon phases obtained from C60 under pressure: the first example of anisotropic disordered carbon solid [2002]

  • BRAZHKIN, V. V, GLAZOV, A. G, MUKHAMADIAROV, V. V, GROMNITSKAYA, E. L, LYAPIN, A. G, POPOVA, V, STAL, O. V, and GOROVA
  • Special issue containing articles presented at the 18th International Conference of High Pressure Science and Technology and the 11th High Pressure Conference in ChinaJournal of physics. Condensed matter (Print). 14(44):10911-10915
Subjects
Crystallography, Cristallographie cristallogenèse, Metallurgy, welding, Métallurgie, soudage, Condensed state physics, Physique de l'état condensé, Sciences exactes et technologie, Exact sciences and technology, Physique, Physics, Etat condense: structure, proprietes mecaniques et thermiques, Condensed matter: structure, mechanical and thermal properties, Propriétés mécaniques et acoustiques de l'état condensé, Mechanical and acoustical properties of condensed matter, Propriétés mécaniques des solides, Mechanical properties of solids, Elasticité, constantes d'élasticité, Elasticity, elastic constants, Anisotropie, Anisotropy, Carbone, Carbon, Célérité son, Sound velocity, Dureté, Hardness, Effet pression, Pressure effects, Elasticité, Elasticity, Etude expérimentale, Experimental study, Module compression, Bulk modulus, Módulo volumétrico, Pression hydrostatique, Hydrostatic pressure, Système désordonné, Disordered systems, Ultrason, Ultrasonic waves, and C
Abstract
We observe an anisotropy of the propagation velocities of longitudinal and transverse ultrasonic waves, as well as of the hardness, for disordered graphite-like samples obtained from the C60 fullerite, which is heated to different temperatures under a pressure of 7.5 GPa. The anisotropy of the elastic properties and the hardness is connected to the additional pressure component that occurs in the quasi-hydrostatic experimental conditions. The elastic characteristics of the samples are determined. We propose a model description relating the observed properties of superhard sp2 carbon to its possible structural features and to the mechanism of its formation.

10. Ultrasonic study of solid-phase amorphization and polyamorphism in an H2O-D2O (1: 1) solid solution [2013]

  • Gromnitskaya, E. L., Lyapin, A. G., Stalgorova, O. V., Danilov, I. V., and Brazhkin, V. V.
  • JETP LETTERS C/C OF PIS'MA V ZHURNAL EKSPERIMENTAL'NOI TEORETICHESKOI FIZIKI. 96(12):789-793

11. The high-pressure phase diagram of synthetic epsomite (MgSO4·7H2O and MgSO4·7D2O) from ultrasonic and neutron powder diffraction measurements [2013]

  • Gromnitskaya, E. L., Yagafarov, O. F., Lyapin, A. G., Brazhkin, V. V., Wood, I. G., Tucker, M. G., and Fortes, A. D.
  • PHYSICS AND CHEMISTRY OF MINERALS. 40(3):271-285

12. Synthesis of glassy boron ceramics [2007]

  • Ekimov, E. A., Sidorov, V. A., Sadykov, R. A., Gromnitskaya, E. L., and Borovikov, N. F.
  • HIGH PRESSURE RESEARCH. 27(1):179-182
Subjects
EHPRG and High pressure research

13. Elastic Properties of Metastable Crystalline and Amorphous GaSb-Ge Semiconductors Synthesized Under High Pressure [2003]

  • Stolbov, A. A., Lyapin, A. G., Popova, S. V., Brazhkin, V. V., Gromnitskaya, E. L., and Stal Gorova, O. V.
  • HIGH PRESSURE RESEARCH. 23(NO 1-2):187-190
Subjects
EHPRG and high pressure research

14. Kinetics and non-ergodic nature of amorphous-amorphous transformations under pressure [2002]

  • Lyapin, A. G., Brazhkin, V. V., Gromnitskaya, E. L., Mukhamadiarov, V. V., Stal gorova, O. V., and Tsiok, O. B.
  • NATO SCIENCE SERIES SUB SERIES II MATHEMATICS PHYSICS AND CHEMISTRY. 81:449-468
Subjects
phase transitions and disordered substances

15. Mechanical properties and microstructure of diamond-SiC nanocomposites [2002]

  • EKIMOV, E. A, GIERLOTKA, S, GROMNITSKAYA, E. L, KOZUBOWSKI, J. A, PALOSZ, B, LOJKOWSKI, W, and NALETOV, A. M
  • Inorganic materials. 38(11):1117-1122
Subjects
Inorganic chemistry, Chimie minérale, Crystallography, Cristallographie cristallogenèse, Condensed state physics, Physique de l'état condensé, Sciences exactes et technologie, Exact sciences and technology, Physique, Physics, Etat condense: structure, proprietes mecaniques et thermiques, Condensed matter: structure, mechanical and thermal properties, Propriétés mécaniques et acoustiques de l'état condensé, Mechanical and acoustical properties of condensed matter, Propriétés mécaniques des nanostructures et des nanomatériaux, Mechanical properties of nanoscale materials, Composition phase, Phase composition, Composición fase, Diamant, Diamonds, Diffraction RX, XRD, Diffraction électron, Electron diffraction, Etude expérimentale, Experimental study, Fraction volumique, Volume fraction, Fracción volumétrica, Microdureté, Microhardness, Microscopie électronique transmission, Transmission electron microscopy, Microstructure, Module Young, Young modulus, Nanocomposite, Nanocompuesto, Silicium carbure, Silicon carbides, and Composite C SiC
Abstract
A bulk composite material close in hardness to diamond was fabricated from nanocrystalline diamond and SiC. The mechanical properties and microstructure of the composite were studied. Young's modulus of the composite is found to be notably lower than the one following from the additivity rule, which is attributable to the influence of structural defects present in the interfacial zone between SiC and diamond. SiC consists of nanometer-scale grains near the interface and submicron grains in the pores.

16. Mechanical behavior and microstructure of nanodiamond-based composite materials [2002]

  • EKIMOV, E. A, GROMNITSKAYA, E. L, GIERLOTKA, S, LOJKOWSKI, W, PALOSZ, B, SWIDERSKA-SRODA, A, KOZUBOWSKI, J. A, and NALETOV, A. M
  • Journal of materials science letters. 21(21):1699-1702
Subjects
Chemical industry parachemical industry, Industrie chimique et parachimique, Metallurgy, welding, Métallurgie, soudage, Condensed state physics, Physique de l'état condensé, Polymers, paint and wood industries, Polymères, industries des peintures et bois, Sciences exactes et technologie, Exact sciences and technology, Physique, Physics, Domaines interdisciplinaires: science des materiaux; rheologie, Cross-disciplinary physics: materials science; rheology, Science des matériaux, Materials science, Matériaux particuliers, Specific materials, Fullerènes et matériaux apparentés; diamants, graphite, Fullerenes and related materials; diamonds, graphite, Nanomatériaux et nanostructures : fabrication et caractèrisation, Nanoscale materials and structures: fabrication and characterization, Sciences appliquees, Applied sciences, Industries chimique et parachimique, Chemical industry and chemicals, Matériaux de construction. Céramique. Verres, Building materials. Ceramics. Glasses, Industries céramiques, Ceramic industries, Céramiques techniques, Technical ceramics, Abrasifs et outils de coupe, Abrasives and cutting tools, Abrasif, Abrasives, Céramique sans oxyde, Non oxide ceramics, Cerámica sin óxido, Diamant, Diamonds, Dureté, Hardness, Etude expérimentale, Experimental study, Matériau composite, Composite materials, Matériau dur, Hard materials, Matériau renforcé dispersion, Dispersion reinforced material, Material renforzado dispersión, Microdureté, Microhardness, Microstructure, Nanocomposite, Nanocompuesto, Nanomatériau, Nanostructured materials, Outil coupe, Cutting tools, Propriété mécanique, Mechanical properties, and Composite SiC C

17. On the nature of amorphous-to-amorphous and crystal-to-amorphous transitions under high pressure [1997]

  • BRAZHKIN, V. V, LYAPIN, A. G, STALGOROVA, O. V, GROMNITSKAYA, E. L, POPOVA, S. V, and TSIOK, O. B
  • Journal of non-crystalline solids. 212(1):49-54
Subjects
Crystallography, Cristallographie cristallogenèse, Chemical industry parachemical industry, Industrie chimique et parachimique, Metallurgy, welding, Métallurgie, soudage, Condensed state physics, Physique de l'état condensé, Sciences exactes et technologie, Exact sciences and technology, Physique, Physics, Etat condense: structure, proprietes mecaniques et thermiques, Condensed matter: structure, mechanical and thermal properties, Structure des liquides et des solides; cristallographie, Structure of solids and liquids; crystallography, Etat cristallin (incluant les mouvements moléculaires dans les solides), Crystalline state (including molecular motions in solids), Aspects cristallographiques des transformations de phase; effets de la pression, Crystallographic aspects of phase transformations; pressure effects, Composé minéral, Inorganic compounds, Non métal, Nonmetals, Agrégat atomique, Atomic clusters, Amorphisation, Amorphization, Cinétique, Kinetics, Eau, Water, Effet pression, Pressure effects, Etude expérimentale, Experimental study, Fullerènes, Fullerenes, Germanium oxyde, Germanium oxides, Matériau semiconducteur, Semiconductor materials, Mode mou, Soft modes, Mode phonon, Phonon mode, Modo fonón, Relaxation réseau, Lattice relaxation, Silicium oxyde, Silicon oxides, Transformation phase, Phase transformations, Très haute pression, Very high pressure, C60, Ge O, GeO2, H O, H2O, O Si, SiO2, and c60
Abstract
Copyright (c) 1997 Elsevier Science B.V. All rights reserved. A number of experimental methods have been applied to study the kinetics of high-pressure solid-state amorphization for some covalent crystals (Si, Ge and GaSb), molecular crystals, C60 and ionic oxides (stishovite and H2O), as well as the amorphous-to-amorphous transitions for H2O and GeO2. The low activation energy for the stishovite →a-SiO2 transition and appreciable variation of kinetic characteristics in the covalent compounds, depending on the number of components, were observed. Using high-pressure solid-state amorphization it is possible to obtain amorphous tetrahedral carbon by compression of C60-crystals. We have shown that the P-T kinetic lines for amorphization smoothly convert to the ordinary crystal-to-crystal hysteresis lines at high temperatures. For the first time experimental evidence for elastic softening in the vicinity of crystal-to-amorphous and amorphous-to-amorphous transitions is presented. The pressure and time dependence of the a-GeO2 volume changes were measured during the high-pressure transformation. The transition occurs in a wide pressure region and the volume has logarithmic time dependence at a fixed pressure. Comparison of the solid-state amorphization and amorphous-to-amorphous transition is made.

18. Ultrasonic study of epsomite (MgSO4·7H2O) under pressure [2010]

  • Gromnitskaya, E. L., Yagafarov, O. F., Lyapin, A. G., Brazhkin, V. V., and Fortes, A. D.
  • High pressure research. 30(1):51-54

19. New Data on Compressibility of Molecular Fullerites C60 and C70 [2010]

  • Yagafarov, O. F., Gromnitskaya, E. L., Lyapin, A. G., Brazhkin, V. V., Kondrin, M. V., and Bogdan, A. V.
  • FULLERENES NANOTUBES AND CARBON NANOSTRUCTURES. 18(4-6):406-411

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