Materials Literature
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Rare-earth (RE) doping can greatly enhance the voltage gradient of ZnO-based varistors, and their nonlinear coefficient, leakage current, energy absorption capability, through-current capability and residual voltage can also be improved to certain extent. In this review, the progress on RE-doped ZnO-based varistor mat…
Vertical integration of hexagonal boron nitride (h‐BN) and graphene for the fabrication of vertical field‐effect transistors or tunneling diodes has stimulated intense interest recently due to the enhanced performance offered by combining an ultrathin dielectric with a semi‐metallic system. Wafer scale fabrication and…
Abstract Diamond-like carbon (DLC) coatings are known to provide beneficial mechanical and tribological properties in harsh environments. Their combination of high wear resistance and low friction has led to their extensive use in any number of industries. The tribological performance of a DLC coating is varied howeve…
X-ray diffraction patterns of graphite oxide (GO) are theoretically simulated as a function of the displacements of carbon atoms using the Debye—Waller factor in terms of the Warren—Bodenstein equation. The results demonstrate that GO has the turbostratically stacked structure. The high order (00l) peaks gradually dis…
Plasma-based techniques offer many unique possibilities for the synthesis of various nanostructures both on the surface and in the plasma bulk. In contrast to the conventional chemical vapor deposition and some other techniques, plasma-based processes ensure high level of controllability, good quality of the produced…
Quasicrystals are non-periodic solids that were discovered in 1982 by Dan Shechtman, Nobel Prize Laureate in Chemistry 2011. The underlying mathematics, known as the theory of aperiodic order, is the subject of this comprehensive multi-volume series. This first volume provides a graduate-level introduction to the many…
Cuprous iodide has been investigated since 1907 when Karl Bädeker prepared this material from metallic copper thin films with subsequent iodization and reported it as fully transparent conductor. Nowadays CuI is recognized as p-type wide bandgap, transparent semiconductor, offering rather high hole mobilities of so fa…
Encapsulation systems are urgently needed both as micrometer and sub-micrometer capsules for active chemicals' delivery, to encapsulate biological objects and capsules immobilized on surfaces for a wide variety of advanced applications. Methods for encapsulation, prolonged storage and controllable release are discusse…
Nanotechnology is gaining momentum due to its ability to transform metals into nanoparticles. The synthesis, characterization, and applications of biologically synthesized nanomaterials have become an important branch of nanotechnology. Plant extracts are a cost-effective, ecologically friendly, and efficient alternat…
Effects of grain size on superelastic properties in Fe-34Mn-15Al-7.5Ni alloy wires with a ⟨110⟩ fiber-texture were investigated by cyclic tensile tests. It was confirmed that the critical stress for induced martensitic transformation and the superelastic strain are functions of relative grain size d/D (d: mean grain d…
The solution to the equilibrium problem for half-plane and stripe weakened by straight transverse cracks and reinforced by thin flexible plates is considered. Boundary conditions of a special form are used as a mathematical model of a thin plate. To establish the limits of the model applicability, a numerical study of…
Repair and restoration features of the electric wheel-set tyre roll surface on a wheel-type milling machine are considered. The processing is performed by a form cutter at speeds up to 180 rpm. Low speed and a substantial weight of the machine (37.5 tons) suggest that noise characteristics in the work area are determi…
The problem on building the output mechanism for the intellectual information system designed for decision-making on the technological control of combines in the field is considered. The domain of the agricultural machines operation is briefly analyzed. The domain objects are complex hierarchical multilevel systems af…
Various trends of the state environmental regulation in the industrial waste handling sphere in Rostov Region are considered. The assessment of the regulation operating mechanisms in the industrial waste generation permits to elicit its key failing. A package plan oriented to improving the regulatory tools of the stat…
The problem on stabilizing the toolpath generation relative to the workpiece taking into account the parametric self-excitation is considered. Factors causing the cyclic parameter variations in the cutting dynamic system are analyzed. These factors are related to the spatial anisotropy of elastic properties in the wor…
Guar gum (GG) and Guar gum/borax (GGb) hydrogels are studied by means of rheology, Low Field Nuclear Magnetic Resonance (LF NMR) and model drug release tests. These three approaches are used to estimate the mesh size (ζ) of the polymeric network. A comparison with similar Scleroglucan systems is carried out. In the ca…
The numerical solution to the problem of the elastic contact between two teeth of the helical gear with circular tooth profile in the face section is described. The problem is solved with the software system of finite element analysis ANSYS. Principles of geometry and finite element model of two elliptical gear teeth…
A general methodological approach to the management of the creation and development of economic associations is considered. It is based on their representation in the form of a focused and evolving process whose driving force is the dialectical unity and struggle between the need and the opportunity, between the conce…
The generalized trajectory of the power drill (PD) operational cycle is considered. In the case under study, the PD shows the increased speed and positioning accuracy of the fluid-feed. An automated hydraulic drive for providing the structural parametric control over the operational cycle and PD positioning is offered…
The research objective is efficiency increase of the development, estimation, and improvement of quality management systems (QMS) of the machine-building enterprises. The existing classifications and operation algorithms of the QMS basic types allow optimizing the processes of product improvement, and the quality of l…