Volume 10, Issue 4, November 2020

The new hybrid nanostructures formed by graphene sheet and C60-fullerene fragment were studied using density functional theory

-A combined technology for deposition of protective coatings on a heat-resistant nickel alloy Inconel 718, combining methods of electro-spark deposition and magnetron sputtering, is proposed. -Double-layer MS-ESA MoSiB/ZrSiB and CrAlSiB/ZrSiB coatings increase the oxidation resistance of the nickel alloy, respectively, by 12 and 40 times.

The approach based on the theory of bent beams allows describing the deformation behavior of porous NiTi with non-ordered structure of pore channels.

Dependences of the true stress on the true strain of the studied alloys at 1200°C and the microstructure of one of them

We obtain a decreasing of hardness with increasing the fracture toughness of Mo2NiB2 - Ni cermets because of the formation of Mo10Ni3C3B phase. A comparative analysis of electronic structure showed relatively low hardness as well as higher plasticity of Mo10Ni3C3B compared to Mo2NiB2 boride due to more isotropic character of interatomic bonding.

The true stress-strain diagram of alloy E110 in the axial and tangential directions.

A straight-line section of the kinetic diagrams of the fatigue fracture of the Mg6Al magnesium alloy after annealing (white dots) and after ECAP (black dots). The test samples were carried out at loads of 800 and 1000 N.

The dependence of the elastic modulus on the composition of the composite

Topography of the surface of the Ti-WC-Co alloy after carburization at a temperature of 1000ºC during 30 minutes

The correlation field of the degree of tetragonality of Y-TZP ceramic and the monoclinic phase content in it after aging in water vapor at 180 ° C and a pressure of 0.2 MPa for 20 h.

The value of thermokinetic EMF in equiatomic titanium nickelide depends on a preliminary deformation.

Effect of energy inhomogeneity of spark pulses on the structure of an electric spark coating: a - energy picture of the distribution of spark pulses; b - granularity of the coating structure

The solidification of the Al86Ni6Gd4Tb2Er2 liquid alloy under pressure of 3 and 7 GPa leads to a change in its phase composition. At a pressure of 7 GPa, metastable crystalline phases were obtained.

The results of experimental studies of the electronic conductivity, Seebeck coefficient and thermal conductivity of the superionic KxCu2-xS (x = 0.1, 0.2, 0.25) alloys in the temperature range from 30 to 420 ° C are presented and discussed.

Using atomic force microscopy, the surface topology of steel 1.0481 with a stitch structure was studied and its roughness and waviness were measured. An analysis of the results showed that a surface with a stitching structure is more developed and has higher values of fractal dimension than the homogeneous structure of troost-martensite.

The selectivity of shear systems during microindentation of single crystals of Hadfield steel by a Vickers pyramid is shown in accordance with the calculated value of the Schmid factor for slip systems.

Structure formation of diamond-like bilayers.

Diffraction reflections KCl (200) at room temperature (T0=297.1 K) and in premelting stage (T2=1018.2 K)

Microstructure of Sn-Si-O film according to HRTEM. Silicon-doped tin dioxide films (Sn-Si-O) were produced by RF reactive ion-beam sputtering of a composite metal tin target in a controlled atmosphere of argon and oxygen.

Monolithic and defect-free samples of the Al-Nb hybrid system aluminomatrix composite at the various deformation conditions and the initial dimensions of the disk were processed by HPT. The greatest refinement of the structural components and the formation of the metal matrix structure, which led to a maximum level of microhardness HV ~ 300, took place when the number of revolutions of the anvil was 30 and the strain rate was 2 rpm.

Cr Doped tungsten oxide nano structures and non linear I-V, C-V, Admittance and Impedance Measurements

Energy spectrum of the main elements in the material: a) electrodes (technical copper); b) particles of sediment powder containing zinc (particle 2 in Table 1)

The conditions for the appearance of a circular current during the ordered motion of the C60 fullerene on graphene with a defect in the form of local hydrogenation of the atomic network are found. The defect should form a bowl-shaped well in the energy surface of interaction of C60 with graphene, along the edges of which the fullerene will make a circular motion.

The structure of the3D frame-bridge NiTi sample produced by wire arc additive manufacturing is more complex than the structure of the simple “walls”.

The functional and mechanical properties of porous shape memory alloys are determined by the phase transformations and the features of the pore structure. The modeling results aimed at clarifying the influence of these factors on the behavior of porous NiTi.

An important distinctive feature of the frictional treatment of the composite NiCrBSi-Cr3C2 coating is to obtain a smoothed surface with protruding 2-5 microns chromium carbides Cr3C2, which form a high-strength supporting "island frames".

The electrical supply was applied to induce an electrical field to the titanium samples, and their microhardness and elastic modulus were measured. The microhardness raised by 11% from 0 V to 1 V, and the elastic modulus increased three times.

Nanoscale precipitates of aluminides of transition metals and the main strengthening phase are one of key factors controlling nanostructuring the Al alloy 1965 during SPD and its mechanical properties.

The group-theoretical classification of atomic vibrations in molecular and crystal structures is discussed. Wigner’s classification, which is valid for small-amplitude oscillations, is generalized to the case of oscillations with arbitrary amplitudes. An elementary introduction to the theory of bushes of nonlinear normal modes is given.