21 Result(s)
within
A. A. Filippov
Physics
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Article
Structural-Phase State and Mechanical Properties of a Laser Cladding Titanium Matrix Composite Based on Ti64 Alloy and TiB2 Ceramics
The paper presents experimental studies on laser cladding synthesis of a titanium matrix composite based on Ti64 titanium alloy and TiB2 ceramic reinforcement. The weight percentage of TiB2 ceramics in the compos...
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Article
INFLUENCE OF SUBSTRATE PREHEATING ON THE STRUCTURAL AND PHASE COMPOSITION OF A NICKEL-BASED CERMET COATING
The deposition process of a nickel-based cermet coating with a high (60 wt.%) mass content of tungsten carbide was investigated. The results showed preheating the substrate to 500°C prevented the formation of ...
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Article
EFFECT OF SUBSTRATE PREHEATING ON THE CERMET COATING STRUCTURE OBTAINED USING ADDITIVE TECHNOLOGIES
This paper is devoted to the influence of substrate preheating on the structure of cermet coatings made of TI–6AL–4V alloy reinforced with B4C particles using direct metal deposition. Coatings with a 15% mass fra...
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Article
Critique of Yakov Zeldovich’s “The Theory of Ignition by a Heated Surface”: Self-Ignition of an Infinite Combustible by Heated Bodies
The basic principles of a thermal explosion had been studied and published by 1980. It seemed that the research was completed, but later it was discovered that Zeldovich’s “ignition condition” does not correla...
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Article
In-Situ Reactions during Direct Laser Deposition of a Functionally Gradient Ti64-B Composite
The paper presents the results of experimental studies on the synthesis of a metal-matrix composite by direct laser deposition, including the assessment of optimum irradiation modes to make such a material fre...
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Article
A Mathematical Theory of Ignition by an Incandescent Surface
In the theory of ignition, the criterion obtained by Ya.B. Zeldovich in 1939, which made it possible to calculate the parameters of some ignition processes approximately, became widely known. In 1984, one of t...
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Article
STUDY OF PHYSICAL PROPERTIES OF TiC–NiCr CERMET COMPACTS OBTAINED BY HOT PRESSING
Results of an experimental study of physical properties, microstructure, and phase composition of a TiC–NiCr cermet compact obtained by hot pressing are presented. It is shown that an increase in the volume fr...
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Article
CREATION OF A HETEROGENEOUS MATERIAL BASED ON THE TITANIUM ALLOY AND TITANIUM BORIDE BY SELECTIVE LASER MELTING
Results of theoretical and experimental investigations of physical and mechanical properties of a heterogeneous material based on the TiB ceramics and Ti–6Al–4V metallic alloy obtained by means of selective la...
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Article
A Review of Methods for Studying the Elastic Characteristics of Nanoobjects
This work is an overview of studies on the determination of the elastic characteristics of nanomaterials published over the past 20 years in peer-reviewed Russian journals. It is known from the liter...
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Article
CREATION OF A FUNCTIONALLY GRADIENT MATERIAL BY THE SELECTIVE LASER MELTING METHOD
The paper presents the results of an experimental study of the microstructure and microhardness of a functionally gradient material fabricated from 316L stainless steel and tungsten carbide (WC) ceramic partic...
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Article
Deposition of Cermet Coatings on the Basis of Ti, Ni, WC, and B4C by Cold Gas Dynamic Spraying with Subsequent Laser Irradiation
This paper studies the formation of cermet coatings by a combined additive manufacturing technology on the basis of cold gas dynamic spraying and subsequent laser irradiation. The coatings are made of titaniu...
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Article
A Theoretical and Experimental Method for Determining the Elastic Characteristics of Nanomaterials
A technique for determining the mechanical characteristics of nanoobjects is presented. A heterogeneous material consisting of a nanophase and a binder phase with specific mass and volume concentrations is con...
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Article
Similarity Laws in Laser Cladding of Cermet Coatings
The influence of the laser beam parameters (power, motion velocity, and focus position) on the characteristics of the track being formed (size, elemental composition, and microhardness) is studied. If the diff...
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Article
Creating a Coating from a Titanium–Aluminum Intermetallic Compound By the Cold Spray Technology
Results of experimental and numerical investigations of the process of creating coatings from a titanium–aluminum intermetallic compound by using an additive method are presented. It is demonstrated that the p...
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Article
Creation of heterogeneous materials on the basis of B4C and Ni powders by the method of cold spraying with subsequent layer-by-layer laser treatment
A method is proposed for creating principally new functionally graded heterogeneous materials on the basis of B4C ceramic powders with different mass fractions in the original mixture and plastic metallic additiv...
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Article
“Structure” facility with a linear ion source for the formation of ordered nanostructures
The design of the developed ion-beam facility with the Tamiris 400-f source (Roth&Rau AG, Germany) is described. The facility is intended for the formation of ordered nanostructures (up to 200 × 200 mm). Thema...
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Article
High-voltage electron cooler project for NICA collider
A high-voltage electron cooling system (ECS) with electron energy reaching 2.5 MeV for the NICA collider is being designed at the Joint Institute for Nuclear Research. The ECS is being developed in corresponde...
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Article
Dependence of the temperature of stochastically heated electrons on the flux density of pulsed laser radiation on a target
Electron dynamics in the field of focused picosecond multimode laser radiation was considered by numerical methods. It was found that the electron energy during stochastic perturbation of its trajectory can ex...
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Article
Two-Dimensional Model of Plasma Cathode with an Open Plasma Boundary
The paper deals with the solution of two problems for which a two-dimensional distribution is found of the current density and of the electric field in the hollow-cathode plasma. In the first one of these prob...
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Article
Renormalization group equations in local approximation
For a class of models with Ginzburg-Landau-Wilson functions of a local form it is proved that the spectrum of a renormalization group operator which is linearized near a fixed point is discrete, real, and limi...
