DEVELOPMENT OF THE PLASMA TORCH FOR SPRAYING INTERNAL SURFACES OF RELATIVELY SMALL DIAMETER

This paper describes the design and development of the plasma torch for spraying the internal surfaces of parts. The technical characteristics of the developed product are given

INVESTIGATION ON ELECTROREDUCTION OF Cu(II) USING A NANOCOMPOSITE TRACK MEMBRANE ELECTRODE

This article discusses the possibility of using nanocomposite track membranes (NCTM) with a current-conducting coating of titanium nitride as a porous cathode material suitable for the electrochemical reduction of copper (II) ions from its sulfate solution

Testing of CP, CPT and causality violation with the light propagation in vacuum in presence of the uniform electric and magnetic fields

We have considered the structure of the fundamental symmetry violating part of the photon refractive index in vacuum in the presence of constant electric and magnetic fields. This part of the refractive index can, in principle, contain CPT symmetry breaking terms. Some of the terms violate Lorentz invariance, whereas the others violate locality and causality. Estimates of these effects, using laser experiments are considered.Comment: 12 page

MODELLING OF THERMAL PROCESSES IN A SUPERSONIC PLASMA GUN

This paper is devoted to development of model of thermal processes in supersonic plasma torch PUN-1 in Solidworks software. As a result, based on the model the volumes of gas and water for efficient cooling of the plasma torch in the process of sputtering were calculated

SYNTHESIS OF SOLID ELECTROLYTES BASED ON ZrO2 BY ATMOSPHERIC PLASMA SPRAYING

This article describes the synthesis of a coating based on zirconium dioxide, with a different content of stabilized yttrium oxide, by atmospheric plasma spraying to obtain solid electrolytes. Phase composition, structure, stability and durability depend on the concentration of yttrium oxide

INVESTIGATION OF THE FORMATION AND PHYSICO-CHEMICAL CHARACTERISTICS OF COATINGS BASED ON THE WC-nCo SYSTEM

This article is devoted to determining the optimal mass ratio of cobalt in the WC-nCo system, which makes it possible to obtain coatings with high adhesion, hardness, corrosion resistance and acceptable resistance to dynamic and thermal loads

Atomic-scale computer simulation study of the interaction of Cu-rich precipitates with irradiation-produced defects in α-Fe

Copper-rich precipitates can nucleate and grow in ferritic steels containing small amounts of copper in solution and this affects mechanical properties. Growth kinetics, composition and structure of precipitates under irradiation are different from those under thermal ageing, and also vary with type of radiation. This implies that the interaction between radiation defects, i.e. vacancies, self-interstitial atoms (SIAs) and their clusters, and precipitates is influential. It is studied here by atomic-scale computer simulation. The results are compared with those of elasticity theory based on the size misfit of precipitates and defects, and the modulus difference between bcc iron and bcc copper. It is found that SIA defects are repelled by precipitates at large distance but, like vacancies, attracted at small distance. Copper precipitates in iron can, therefore, be sinks for both vacancy and interstitial defects and hence can act as recombination centres under irradiation conditions. A tentative explanation for the mixed Cu–Fe structure of precipitates observed in experiment and the absence of precipitate growth under neutron irradiation is given. More generally, agreement between the simulations and elasticity theory suggests that the results are not artefacts of the atomic model: both vacancy and interstitial defects in metals may bind to precipitates with weaker cohesion than the matrix