Перегляд за автором "Makara, V.A."

Сортувати за: Порядок: Результатів:

  • A theoretical model for calculation of biphase composite failure energy 
    Popov, A.Yu.; Kazo, I.F.; Makara, V.A. (Functional Materials, 2005)
    А conjunction of two approaches to the estimation of composite material strength characteristics is reported. The first approach is based on taking into account the influence of crack front bending between two stoppers ...
  • Calculation of fracture toughness for a biphase ceramic material 
    Popov, O.Yu.; Kazo, I.F.; Makara, V.A. (Functional Materials, 2006)
    А model for biphase ceramic material fracture toughness prognosis is proposed based on the estimation of influence of second phase mechanical properties and grain size and taking into account the possibility of rounding ...
  • Comprehensive studies of defect production and strained states in silicon epitaxial layers and device structures based on them 
    Boltovets, N.S.; Voitsikhovskyi, D.I.; Konakova, R.V.; Milenin, V.V.; Makara, V.A.; Rudenko, O.V.; Mel’nichenko, M.M. (Semiconductor Physics Quantum Electronics & Optoelectronics, 2001)
    Using the Lang technique of x-ray topography, double-crystal x-ray spectrometry and selective chemical etching, we investigated the defect production in silicon epitaxial structures grown on the n⁺-Si substrates (surface ...
  • Effect of 1.9-MeV electron irradiation on characteristics of reactively-pressed TiB₂–TiС ceramic composites 
    Totsky, I.N.; Popov, A.Yu.; Makara, V.A. (Semiconductor Physics Quantum Electronics & Optoelectronics, 2013)
    Considered in this paper is the effect of electron irradiation on the phasestructural state and micromechanical characteristics of reactively- and nonreactivelypressed TiB₂–TiС composite ceramic materials. It is shown ...
  • Effect of a weak constant magnetic field on the silicon single crystal structure 
    Makara, V.A.; Kalinichenko, D.V. (Functional Materials, 2011)
  • Effect of magnetic field on microhardness of germanium 
    Makara, V.A.; Steblenko, L.P.; Kuryliuk, A.M.; Naumenko, S.M.; Kolchenko, Iu.L.; Kravchenko, V.M. (Functional Materials, 2007)
    Microhardness variations in germanium crystals caused by a weak constant magnetic field have been studied. It is fount that the magnetomechanical effect, that is relative change in microhardness, becomes relaxed in time. ...
  • Effect of neutron irradiation on non-equilibrium HfB₂-B₄C composites 
    Totsky, I.M.; Shynkarenko, V.V.; Popov, O.Yu.; Makara, V.A. (Semiconductor Physics Quantum Electronics & Optoelectronics, 2013)
    We studied the effect of neutron irradiation on composite material HfC-HfB₂- C made using rapid reactive hot pressing technology. The histograms of microhardness and results of X-ray phase analysis, obtained both before ...
  • Effect of weak magnetic field on structural arrangement of extrinsic oxygen atoms and mechanical properties of silicon monocrystals 
    Makara, V.A.; Steblenko, L.P.; Kolchenko, Yu.L.; Naumenko, S.M.; Lisovsky, I.P.; Mazunov, D.O.; Mokliak, Yu.Yu. (Semiconductor Physics Quantum Electronics & Optoelectronics, 2006)
    IR spectroscopy study is indicative of the change in the relative concentration of interstitial oxygen in silicon monocrystals after their treatment by using the magnetic field. This is an evidence of a considerable effect ...
  • Evidence for photochemical transformations in porous silicon 
    Shevchenko, V.B.; Makara, V.A.; Vakulenko, O.V.; Dacenko, O.I.; Rudenko, O.V. (Semiconductor Physics Quantum Electronics & Optoelectronics, 1999)
    The dynamics of the variation of photoluminescence intensity (PLI) of porous silicon (PS) samples subjected to laser irradiation (337 nm, 3.7 mW) during their ageing in air has been studied. The PLI turned out to increase ...
  • Magnetic-Field-Stimulated Modification of Surface Charge and Defect Content in Silicon for Solar Energy Storage 
    Makara, V.A.; Steblenko, L.P.; Korotchenkov, O.A.; Nadtochiy, A.B.; Kalinichenko, D.V.; Kuryliuk, A.M.; Kobzar, Yu.L.; Krit, O.M. (Металлофизика и новейшие технологии, 2014)
    The effect of a weak static magnetic field on the structure and charge state of silicon for solar energy storage is investigated. As found, the magnetic-fieldstimulated changes in the defect—impurity state and surface ...
  • Modification of sintered iron properties by Y₂O₃ nanoparticles 
    Cherednyk, M.I.; Popov, O.Yu.; Chornobuk, S.V.; Totsky, I.M.; Semenko, M.P.; Boshko, O.I.; Tkachuk, V.Ja.; Slobodianyk, Y.V.; Naumenko, S.M.; Makara, V.A. (Functional Materials, 2016)
    Influence of Y₂O₃ nanoparticles on sintered iron structure and microhardness is investigated. Ferrite grain growth is shown to be slowed down by the clusters which cause altering the grain shape from needle-like to equiaxial ...
  • Post-anodic formation of luminescent porous silicon layers in atmospheric environment 
    Makara, V.A.; Vakulenko, O.V.; Shevchenko, V.B.; Dacenko, O.I. (Functional Materials, 2005)
    The changes occuring in HF pre-etched porous silicon (PS) samples during aging are studied by measurement of photoluminescence (PL) and IR transmission spectra. The PL behavior of the etched sample is found to depend on ...
  • Relation between structure inhomogeneities and relaxation processes in excited silicon crystals 
    Makara, V.A.; Kolomiets, A.M.; Kolchenko, Yu.L.; Naumenko, S.M.; Rudenko, O.V.; Steblenko, L.P. (Functional Materials, 2004)
    The part played by electric current pulses in formation of residual electroplastic effect and the "electric memory" effect in dislocation-containing silicon crystals has been investigated. The character of the observed ...
  • Silicon crystal strength reduction due to magnetoresonance 
    Makara, V.A.; Pogorilyi, A.M.; Steblenko, L.P.; Kuryliuk, A.M.; Naumenko, S.M.; Kobzar, Yu.L.; Kravets, A.F.; Podyalovsky, D.I.; Matveeva, O.V. (Functional Materials, 2007)
    The magnetoresonance influence as well as the micrawave superhigh-frequency (SHF) magnetic field effect on the microhardness of silicon crystals has been studied. It is established that the action of SHF field results in ...
  • Structure and luminescence study of nanoporous silicon layers with high internal surface 
    Makara, V.A.; Melnichenko, M.M.; Svezhentsova, K.V.; Khomenkova, L.Yu.; Shmyryeva, O.M. (Semiconductor Physics Quantum Electronics & Optoelectronics, 2003)
    In this work, the technique of formation of homogeneous nanoporous silicon layers with high internal surface on solar cell substrates by stain etching is developed. Emission and structure properties of such layers were ...
  • The relaxation of magnetomechanical effect in silicon crystals under cyclic magnetic treatment 
    Makara, V.A.; Steblenko, L.P.; Kuryliuk, A.M.; Kobzar, Iu.L.; Naumenko, S.M.; Krit, A.M.; Kravchenko, V.M. (Functional Materials, 2009)
    The experimental magnetic treatment conditions of silicon crystals in a weak (B = 0.17 T) magnetic field which provide a long-term stability of magnetomechanical effect (MME) have been investigated. It is established that ...