LK-5 glass surface modification by glass blowing method based on microsystem technology

This paper considers the possibility of modifying the surface LK-5 glass by glass blowing methods to solve the problems of creating an atomic clock and ensuring a controlled distribution of metal nanoparticles on its surface. The evolution of the formation of a spherical profile of a glass surface on a hermetically welded cavity in a glass-silicon system was studied experimentally and theoretically. Also, the possibility of modifying the spatial parameters of arrays of nanoparticles distributed on the glass surface has been demonstrated. The obtained experimental and theoretical data demonstrate sufficient convergence.

Physicochemical Interaction Processes in the Carbon (Diamond)–Silicon System

The chemical processes occurring during the interaction of carbon (diamond) with silicon are experimentally investigated. Thermal analysis of the interaction of diamond with silicon is carried out. This made it possible to determine the mechanism of the synthesis of silicon carbide and subsequent reaction sintering of diamond particles based on Turing’s reaction-diffusion process and the formation of a microstructure consisting of triple periodic surfaces of the minimal energy.

Improving the quality of bars from special alloy of the copper—nickel—silicon system

Possibilities of improving the quality of a special wear-resistant and heat-resistant alloy Cu—Ni—Si of the copper — nickel — silicon system used in the production of special-purpose electro-vacuum devices are analyzed.

Application of Pressure Treatment Methods for Solid Processing of Silumin Chip Waste

n this article various technological schemes for processing waste in the form of chips of an alloy of an aluminum-silicon system are presented. It was noted that the processing of fine waste of the chips type is always accompanied by oxidation of the metal due to the large surface of contact with the air. To eliminate the loss of metal into oxides during re-melting, this study proposes processing chips by pressing to obtain briquettes (a method of hot extrusion is meant by ‘pressing’). Processing involves the receipt of briquettes from rods. The processes of cold and hot briquetting were undertaken separately. The results of applying the scheme using real production waste are presented in this study. The tensile strength achieved was up to 270 MPa. The relative elongation to rupture was 10–25% and the area reduction after rupture was 25–45%. There were no large differences in the use of briquettes obtained by cold processing and hot processing. The conclusion is drawn about the overall effectiveness of the application of the waste processing without the use of the metal melting. Keywords: silumin, shavings, extrusion, plastic deformation, heat treatment

Effect of Electrolysis Modes on Physico-Mechanical Properties of Composite Coatings Based on Nickel

The receiving method and some properties of the composite nickel containing galvanic coating on base nickel-cobalt-oxide silicon-carbide silicon system were discussed. Chloride electrolyte for the application of the composite electroplating coating with firmness to wear and corrosion properties of nickel-cobalt-oxide silicon-carbide silicon system was elaborated. Influence of electrolysis and electrolyte composition on physico-mechanical properties (firmness to wear, corrosion resistance, hardness, internal tensions, porosity, adhesion) of the composite electrolytic coating of nickel-cobalt-silicon oxide system, electroplated from chloride electrolyte, and on the properties of electrolyte (diffusing ability, output current draught) were investigated. The possibility of using for composite electroplating of nickel-cobalt-silicon oxide-carbide silicon system as a firmness to wear coating in instead of chrome was showed.