Time filter

Source Type

Goncharov A.A.,Donbass State Academy of Machine Building | Dub S.N.,Ukrainian Academy of Sciences | Agulov A.V.,Donbass State Academy of Machine Building
Physics of Metals and Metallography | Year: 2013

The paper deals with the study of the effect of the deposition conditions (the bias potential and substrate temperature) on the structure, composition, and physicomechanical characteristics of nanocrystalline films of hafnium diboride and boridonitride formed by the method of nonreactive (in Ar) and reactive (in Ar + N2) HF magnetron sputtering, respectively. The optimal conditions for the deposition of the hafnium diboride coatings with growth texture in plane (00.1) and the best physicomechanical characteristics are deter-mined. It is shown that at a bias potential of ±50 V and a substrate temperature of ∼500 C superstoichiometric highly textured films are formed with a nanohardness of 44 GPa and an elastic modulus of 396 ± 11 GPa. A relation between the composition, structure, and physicomechanical characteristics of the films is found. Reactive sputtering in (Ar + N 2) makes it possible to produce amorphous-crystalline films of the composite (HfB2 + BN) that consists of grains of the HfB2 nanocrystalline phase, the spaces between which are filled with the amorphous phase of graphite-like BN. © 2013 Pleiades Publishing, Ltd. Source

Dreval' L.A.,Donbass State Academy of Machine Building | Abdulov A.R.,Donbass State Academy of Machine Building | Agraval P.G.,Donbass State Academy of Machine Building | Turchanin M.A.,Donbass State Academy of Machine Building
Russian Journal of Physical Chemistry A | Year: 2010

The partial enthalpy of mixing of vanadium in three-component Cu-Fe-V melts was studied at 1873 K along sections with constant x Cu/x Fe ratios of 3, 1, and 1/3 over the composition range x V = 0-0.55 by high-temperature isoperibolic calorimetry. The Muggianu-Redlich- Kister model was used to describe the concentration dependence of the integral enthalpy of mixing of Cu-Fe-V melts over the whole concentration triangle. The contribution of ternary interaction to the integral enthalpy of mixing of Cu-Fe-V melts was calculated. © 2010 Pleiades Publishing, Ltd. Source

Discover hidden collaborations