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  1. No Access

    Article

    Calorimetric and Volumetric Studies of Dislocations during Martensitic Transformations in TiNi Alloy with Shape Memory

    An in-depth analysis of calorimetric and volumetric data for direct, reverse, and deformation martensitic transformations in the nanostructured alloy Ti49.3Ni50.7 with shape memory is carried out. The samples are...

    Yu. S. Nechaev, E. A. Denisov in Journal of Surface Investigation: X-ray, S… (2024)

  2. No Access

    Article

    Cottrell Cosegregations of Carbon and Hydrogen: Characteristics and Role in the Strain Aging and Embrittlement of Steels

    This study investigates the characteristics of phase-like Cottrell atmospheres, which are carbohydride-like cosegregations of carbon and hydrogen, present at dislocations within the martensitic and ferritic co...

    Yu. S. Nechaev, E. A. Denisov in Journal of Surface Investigation: X-ray, S… (2023)

  3. No Access

    Article

    On Fundamental Aspects of Solving the Problem of “Super” Storage of Hydrogen in Catalytically Synthetized Graphite Nanofibers

    This work considered some fundamental aspects (basics) of solving the long-term (discussed by many researchers for about 25 years) problem of “super” storage (in Maeland’s terminology) of “reversible” hydrogen...

    Yu. S. Nechaev, E. A. Denisov, A. O. Cheretaeva, N. A. Shurygina in Kinetics and Catalysis (2022)

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    Article

    On Hydrogen “Superstorage“ in Know-How Activated Graphite Nanofibers

    The extraordinary, unreproduced data of Rodriguez, Baker, Gupta on the “superstorage” of “reversible” and “irreversible” hydrogen in activated graphite nanofibers are studied using an effective methodology for...

    Yu. S. Nechaev, E. A. Denisov in Journal of Surface Investigation: X-ray, S… (2022)

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    Article

    On the Physics and Atomic Mechanisms of Molecular Hydrogen Intercalation into Graphite Nanofibers

    The fundamental experimental data obtained in [I.O. Bashkin et al., JETP Lett. 79, 226 (2004)] on three states of hydrogen corresponding to physical sorption (state 1), chemisorption (state 2), and intercalation ...

    Yu. S. Nechaev, E. A. Denisov, N. A. Shurygina, A. O. Cheretaeva in JETP Letters (2021)

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    Article

    Studying the States of Hydrogen in Graphene, Graphite, and Steels

    Methodology is developed and tested for the effective approximation of carbon nanostructures, graphite materials, and steels using Gaussians and the processing (in approximations of first and second order reac...

    Yu. S. Nechaev, N. M. Alexandrova in Bulletin of the Russian Academy of Science… (2021)

  7. No Access

    Article

    Peaks of Hydrogen Thermal Desorption: Simulation and Interpretation

    Different models of hydrogen thermal desorption peaks have been analyzed. The model of volume-averaged concentration dynamics with a continuum parameter makes it possible to integrally take into consideration ...

    Yu. V. Zaika, E. K. Kostikova, Yu. S. Nechaev in Technical Physics (2021)

  8. No Access

    Article

    The Possibility of liquid-like and amorphous states existing in nano- and microregions of deformed metallic materials

    The possibility of the periodic formation of a liquid-like state in nanoregions of highly nonequilibrium grain boundaries and other regions of defects in metallic materials upon superplastic deformation and in...

    Yu. S. Nechaev, V. P. Filippova in Bulletin of the Russian Academy of Science… (2017)

  9. No Access

    Article

    Deformation of graphene layers and phase transformations in the hydrogen nanophase intercalated in them

    The intercalation of a high-density molecular hydrogen nanophase into graphene nanostructures has been studied. The deformation of the graphene layers in the material and the phase transformations of intercala...

    Yu. S. Nechaev, V. P. Filippova, A. A. Tomchuk in Russian Metallurgy (Metally) (2016)

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    Chapter and Conference Paper

    Creation Of New Composite Materials For Hydrogen Energy Purposes. I. New Lines Of Membrane Production Technology

    One of the main problems of hydrogen energy is separation and purification of hydrogen produced by various conversion methods from raw hydrocarbons. Carbon membranes can become real alternative both to inorgan...

    O. K. Alexeeva, M. M. Chelyak, A. A. Kotenko in Carbon Nanomaterials in Clean Energy Hydro… (2008)

  11. No Access

    Chapter and Conference Paper

    A Possibility of a Phase Fluctuationlike Effect in Htsc Cuprates

    On the basis of the thermodynamic analysis of the related experimental data, a possibility is shown of a manifestation of a phase fluctuation-like effect in the high-temperature superconducting (HTSC) cuprates...

    Yu. S. Nechaev in New Challenges in Superconductivity: Exper… (2005)

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    Article

    Effect of activators evolving hydrogen fluoride on formation of protective diffusion coatings

    V. I. Kostikov, Yu. S. Nechaev, G. Ya. Kul’ga in Doklady Physics (2001)

  13. No Access

    Article

    Effect of a dispersed phase on the magnetic properties of an unalloyed isotropic transformer steel

    V. I. Sidorkin, Yu. S. Nechaev, D. G. Mukham'etov in Metal Science and Heat Treatment (1992)

  14. No Access

    Article

    Nature and mechanism of diffusion in deformed Ni−Fe and Al−Ag alloys

    Yu. S. Nechaev, S. A. Vladimirov, N. A. Ol'shevkii in Metal Science and Heat Treatment (1992)

  15. No Access

    Article

    Diffusion and solubility of some interstitial impurities in deformed metals

    The problem of impurity diffusion accompanying segregation phase nucleation on dislocations has been studied using the approximation of the local equilibrium with respect to the impurity distribution between t...

    Yu. S. Nechaev, Belay B. Kidane in Il Nuovo Cimento D (1990)

  16. No Access

    Article

    Change in the electrical resistivity of Al−3.5% Cu during thermal cycling in the solidus-liquidus range

    1. From the rate of the change in the temperature coefficient of electrical resistivity of Al−3.5% Cu in the sol...

    A. S. Bubenshchikov, Yu. S. Nechaev, L. N. Shekhter in Metal Science and Heat Treatment (1982)

  17. No Access

    Article

    Features of secondary quenching defects in solid solutions of iron in aluminum

    Using NMR, electron microscopy, and resistometry, specimens of Al+0.03% Fe and Al+0.10% Fe quenched from temperatures of 903–923°K (in water) and subjected to “gradual” annealing at 633–733°K are investigated....

    Yu. S. Nechaev, V. G. Leont'ev, V. V. Istomin in Soviet Physics Journal (1981)

  18. No Access

    Article

    Characteristics of vacancies and temperature coefficients of electrical resistivity in aluminum and its alloys

    1. The main source and sink of vacancies in large polycrystals of aluminum and alloys of Al+0.2–3.5% Cu and Al+0...

    Yu. S. Nechaev, A. S. Bubenshchikov in Metal Science and Heat Treatment (1979)

  19. No Access

    Article

    Changes in activity of key enzymes of glyconeogenesis in the liver and kidney of rats exposed to subextremal and extremal factors

    Activity of the key enzymes of glyconeogenesis-phosphoenolypyruvate carboxykinase (PEPCK), fructose-1,6-diphosphatase (FDPase), and glucose-6-phosphatase (G6Pase) — in the liver and kidneys of rats was investi...

    L. E. Panin, I. E. Kolosova in Bulletin of Experimental Biology and Medicine (1979)

  20. No Access

    Article

    Characteristics of the disappearance of excess vacancies on dislocations in aluminum alloys

    1. The kinetics of the disappearance of excess vacancies on intragranular dislocations in Al+3.5% Cu with coolin...

    Yu. S. Nechaev, A. S. Bubenshchikov in Metal Science and Heat Treatment (1979)

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