A new approach to stripping surface layers from ceramics with fast atoms is proposed. The existing beam sources do not allow for a rate of more than few µm/h be achieved. Usually, an increase in the etching associated growing flux density and energy atoms, which can heat parts source up inadmissible temperature. In present work, was significantly increased at permanent due angle incidence on product surface. An zero 80° resulted only by several times but also simultaneous polishing high...

Today, the machining of heat-resistant alloys based on triple, quad, or penta equilibria high-entropy alloy systems elements (ternary, quaternary, quinary iron-, titanium-, nickel-rich alloys), including dual-phase by Gibb’s phase rule, steels austenite class, and nickel- titanium-based alloys, are highly relevant for airspace aviation industry, especially production gas turbine engines. Cutting tools in contact with those should withstand intensive mechanical thermal loads (tense state...

Insulating cutting ceramics exhibit outstanding mechanical and thermal properties but have electrical conductivity below the percolation threshold. It does not allow sophisticated shapes to be obtained by diamond grinding polishing. The developed innovative technique is based on choosing wear-resistant coating chemical composition of its behaviour at 1000–10 000°C, including changing from insulating conducting level, dissociation/sublimation components forming new conductive compounds during...

We present a new method for coating deposition on micro cutters without an increase in their cutting edges radii caused by the deposition. For this purpose, are sharpened before with concentrated beam of fast argon atoms. The sharpening decreases initial radius and, hence, limits its value after atoms is generated using immersed gas discharge plasma concave grid under negative high voltage. Ions accelerated from pass through holes and focal point grid. As result charge exchange space sheaths...

The surface of ceramic products manufactured using diamond grinding is replete with shallow scratches, deep grooves and other defects. thickness the defective layer amounts to 3–4 µm it must be removed increase wear resistance when exposed intense thermomechanical loads. In this study, removal layers from samples made ZrO2, Al2O3 Si3N4 a beam fast argon atoms was carried out stripping rate up 5 µm/h. To prevent contamination source by sputtered dielectric material, compressed passed sample...

Surface hardening of machine parts substantially improves their performance. The best results are obtained when combined consists surface nitriding and subsequent deposition hard coatings. immersed in the plasma glow coatings have been studied, study presented. Titanium atoms for coating synthesis via titanium evaporation a hollow molybdenum anode discharge. Stable occurs only power density electrons heating liquid does not exceed ~500 W/cm2. To start evaporation, it is necessary to reduce...

Additive manufacturing has evolved over the past decades into a technology that provides freedom of design through ability to produce complex-shaped solid structures, reducing operational time and material volumes in significantly. However, surface parts manufactured by additive method remains now extremely rough. The current trend expanding industrial application is researching roughness finishing. Moreover, limited choice materials suitable for does not satisfy diverse requirements,...

A process vacuum chamber is filled with a homogeneous plasma of glow discharge electrostatic electron confinement, which used for surface hardening massive products. At the current 2–20 and gas pressure ranging from 0.1 to 1 Pa voltage amounts 350–500 V. When bias 2 kV applied an immersed in hollow cylinder mass 15 kg, electrical power spent on heating it by accelerated ions exceeds order magnitude maintenance. The heated up 700 °C min. argon mixture nitrogen (30%) used, nitriding 3h results...

This research aimed at an increase in wear resistance of round cutting plates manufactured with SiAlON dielectric ceramics through deposition wear-resistant coatings. To effectiveness the coatings, their adhesion was improved by removal defective surface layers from before deposition. As depth caverns and grooves appearing on due to manufacturing diamond grinding reached 5 µm, a concentrated beam fast argon atoms used for thickness exceeding grooves. At equal angles incidence front back...

Wear-resistant coatings improve the machining capability of cutting tools and extend their useful life. However, when a tool needs to be reused, it is mandatory remove existing coating facilitate resharpening recoating. The technique uses electrochemical stripping, which hazardous environment. environmentally friendly pulsed laser stripping causes melting mixing materials, makes difficult separate coating. This paper presents results via beam fast argon atoms. Due twentyfold compression...

Laser ablation is considered as an alternative to other methods that allow precise processing of various tool materials and work with both the base material thin films wear-resistant coatings. This article presents investigation possibility setting microgeometry surface cutting made high-speed steel M2 hard alloy WCCo 3 using nanosecond infrared marking Nd:YVO4 laser. Dependencies width depth resulting tracks on specified laser power are obtained. It was revealed their depends a set several...

The work examines the possibility of using automation equipment for transporting bulk products bucket pendulum conveyors, taking into account modular implementation installation, which allows you to rebuild and adapt process at any time required purposes use.

Technologies associated with using concentrated energy flows are increasingly used in industry due to the need manufacture products made of hard alloys and other difficult-to-process materials. This work is devoted expanding knowledge about processes accompanying impact laser pulses on material surfaces. The features these reflected acoustic emission signals, parameters which were as a tool for understanding phenomena. influence plasma formations above surface self-oscillatory phenomena...

Mechanical polishing of a product makes it possible to decrease the roughness its surface Ra = 0.001 µm by rubbing with fine abrasive contained in fabric or other soft material. This method takes too much time and is associated particles microscopic scratches remaining after processing. As such, non-contact treatment plasma accelerated has been chosen present work study ceramic samples. The small angular divergence fast argon atoms made obtain dependence sample on angle α atom’s incidence...

The surfaces of ceramic products are replete with numerous defects, such as those that appear during the diamond grinding sintered SiAlON ceramics. defective surface layer is reason for low effectiveness TiZrN coatings under abrasive and fretting wear. An obvious solution removal an up to 4-µm-thick containing defects. It was proposed in present study etch fast argon atoms. At atom energy 5 keV a 0.5 mA/cm2 current density, ions were converted into atoms sputtering rate samples reached 20...

Micro-milling is widely used to make micro-channels in various fields. In this study, micro-milling of rectangular bronze microchannels was carried out with carbide end mills a diameter 1 mm, processed fast argon atoms, and coated anti-friction wear-resistant titanium diboride. It shown that the removal 3 µm thick surface layer from micro mill atoms makes it possible reduce cutting edge radius tool 1.2 µm, which three times lower than minimum value 4 achievable mechanical manufacturing. The...

To improve the quality of a part manufactured by additive method, it is necessary to eliminate porosity and high roughness its surface, as well deposit coating on it. For this purpose, in present work, we studied combined processing gas discharge plasma complex shape parts obtained manufacturing which includes explosive ablation surface protrusions when voltage pulses are applied immersed plasma; polishing with concentrated beam fast neutral argon atoms at large angle incidence part,...

Abstract The results of studying a beam source fast argon atoms obtained by neutralizing charges accelerated ions during their flight through an accelerating grid in the form set plane–parallel plates are presented. Ions from plasma emitter voltage negative polarity at grid, fly into gaps between its plates, and, when approaching surfaces, cause emission electrons that neutralize ion charge. equivalent current emitted is up to 90% circuit, and energy equal corresponds grid. To increase...

Abstract The study’s purpose is to determine the rational Si content in DLC-Si external layer of (CrAlSi)N/DLC-Si coatings deposited on α/β-SiAlON + TiN ceramics. influence physical and mechanical properties such as microhardness, modulus elasticity, friction coefficient, wear resistance solid ceramic end mills machining nickel alloy NiCr20TiAl determined.

The research presents the principles of development and practical implementation (including rational modes) combined treatment technology for surface precision parts with a broad beam ions and/or fast argon atoms. In single technological cycle, two process stages are realized: polishing at an incidence 80º to made different material, which enables level roughness deposition protective nanostructured films on immersed in dense plasma produced by magnetron sputtering mixture inert reactive...

The research aims to investigate the effect of depositing nitride and Si-containing amorphous hydrogenated carbon films on characteristics SiAlON-based ceramics experimentally. TiN/(Ti,Al)N, (Cr,Al,Si)N (Cr,Al,Si)N/a-C:H:Si coatings microrelief surface defects was studied. nanohardness, plasticity, coefficient friction ceramic material at room temperature under heating conditions after applying mentioned were quantified. Laboratory durability tests mills with different during machining a...

Abstract A new method is used for stripping coatings from any products before application of that extend their service life. To fulfil this task it proposed to act on the surface with energetic atoms. The effectiveness atoms coating determined by sputtering rate, which grew because twentyfold compression flow. 3-μm-thick AlTiN film was removed a 12-cm 2 area 1-cm-diameter cylinder made tungsten carbide within 12 min.

Abstract The surface of a 26-mm-diameter reamer made AISI M2 high-speed steel has been nitrided in low-pressure glow discharge plasma. Then 3-μm-thick wear-resistant TiN coating magnetron sputtered on the hardened surface. After combined processing reamer’s cutting edges radii grew from initial value ∼8 μm up to ∼37 μm. reason for strengthened tool blunting is selective sputtering by heating ions accelerated Another under nitriding was heated beam fast atoms arriving at an immersed plasma...