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Features of Nitriding Stainless Steels in a Stream of Low-Energy Ions 低能离子流渗氮不锈钢的特点
IF 0.8 4区 物理与天体物理
Technical Physics Letters Pub Date : 2026-06-28 DOI: 10.1134/S1063785026700483
I. Sh. Abdullin, K. Sh. Mastyukov, S. V. Mironov
{"title":"Features of Nitriding Stainless Steels in a Stream of Low-Energy Ions","authors":"I. Sh. Abdullin,&nbsp;K. Sh. Mastyukov,&nbsp;S. V. Mironov","doi":"10.1134/S1063785026700483","DOIUrl":"10.1134/S1063785026700483","url":null,"abstract":"<p>The article discusses a method for increasing the wear resistance of tool steels by hardening using a low-pressure high-frequency induction (HFI) discharge. The process of applying diffusion coatings in an HFI plasma installation using gas mixtures (argon, nitrogen, propane–butane) with parameters of pressure 13.3–133 Pa, power 0.5–3 kW, and processing time 1–30 min is described. The experiments were carried out on steels of grades Kh12М, R6М5, R7M2F6, R2MF2. Hardness and wear resistance increases by from two to three times, and the depth of the modified layer reaches 150 μm.</p>","PeriodicalId":784,"journal":{"name":"Technical Physics Letters","volume":"52 3","pages":"82 - 84"},"PeriodicalIF":0.8,"publicationDate":"2026-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148323762","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Estimating the Rate of Barium Loss from a Hollow Cathode Emitter by Optical Emission Spectroscopy 利用发射光谱法估算空心阴极发射器的钡损失率
IF 0.8 4区 物理与天体物理
Technical Physics Letters Pub Date : 2026-06-28 DOI: 10.1134/S1063785026700276
A. E. Fedorova
{"title":"Estimating the Rate of Barium Loss from a Hollow Cathode Emitter by Optical Emission Spectroscopy","authors":"A. E. Fedorova","doi":"10.1134/S1063785026700276","DOIUrl":"10.1134/S1063785026700276","url":null,"abstract":"<p>The work aims at developing a method for estimating the rate of barium loss from a tungsten-barium emitter using optical emission spectroscopy. A model for the dependence of barium concentration in the cathode plasma on the glow intensity of its spectral lines is used. The rate of barium loss depending on the cathode discharge current and the gas flow rate has been studied. At the same time, the rate of barium loss is estimated using the pyrometry method. Comparing the two methods showed that the dependences of the loss rate on the specified parameters are qualitatively the same.</p>","PeriodicalId":784,"journal":{"name":"Technical Physics Letters","volume":"52 3","pages":"152 - 154"},"PeriodicalIF":0.8,"publicationDate":"2026-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148323763","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The Effect of Bismuth Oxide Additive on Sintering of Zirconia Ceramics at Reduced Compaction Pressure 氧化铋添加剂对氧化锆陶瓷降压烧结的影响
IF 0.8 4区 物理与天体物理
Technical Physics Letters Pub Date : 2026-06-28 DOI: 10.1134/S1063785026600031
S. A. Ghyngazov, I. P. Vasiliev, A. P. Klishin, A. S. Ghyngazov, S. A. Shevelev, V. P. Krivobokov
{"title":"The Effect of Bismuth Oxide Additive on Sintering of Zirconia Ceramics at Reduced Compaction Pressure","authors":"S. A. Ghyngazov,&nbsp;I. P. Vasiliev,&nbsp;A. P. Klishin,&nbsp;A. S. Ghyngazov,&nbsp;S. A. Shevelev,&nbsp;V. P. Krivobokov","doi":"10.1134/S1063785026600031","DOIUrl":"10.1134/S1063785026600031","url":null,"abstract":"<p>The influence of the low-melting additive bismuth oxide on the consolidation processes of partially stabilized zirconium dioxide nanoparticles in compacts obtained under compacting pressures was studied: 1, 50, and 800 kg/cm<sup>2</sup>. It is shown that, at a compacting pressure of ≤50 kg/cm<sup>2</sup>, the density of the compacts is comparable in magnitude to the bulk density. It has been established that the introduction of a low-melting additive facilitates the production of ceramics from compacts of low density obtained at pressures from 1 to 50 kg/cm<sup>2</sup>. At compacting pressure ≥50 kg/cm<sup>2</sup>, the presence of the additive helps to obtain ceramics with a density of ≥5.8 g/cm<sup>3</sup>. During sintering, the concentration area of the additive is located in the intergranular boundaries. The presence of additives in ceramics, due to phase transformations with temperature changes, leads to crack formation mainly along grain boundaries. For low compacting pressures, a decrease in porosity and an increase in density and average grain size are observed as the compacting pressure and the content of the low-melting oxide additive increase. The research results are of great importance for the development of new ceramic 3D printing technologies.</p>","PeriodicalId":784,"journal":{"name":"Technical Physics Letters","volume":"52 2","pages":"56 - 61"},"PeriodicalIF":0.8,"publicationDate":"2026-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148323918","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Adhesion of Polymer Powder Coatings 聚合物粉末涂料的附着力
IF 0.8 4区 物理与天体物理
Technical Physics Letters Pub Date : 2026-06-28 DOI: 10.1134/S1063785026700264
V. L. Fedyaev, I. V. Morenko, A. V. Belyaev
{"title":"Adhesion of Polymer Powder Coatings","authors":"V. L. Fedyaev,&nbsp;I. V. Morenko,&nbsp;A. V. Belyaev","doi":"10.1134/S1063785026700264","DOIUrl":"10.1134/S1063785026700264","url":null,"abstract":"<p>This article examines the mechanisms of adhesive bond formation at the interface between the substrate and the coating. A model of the adhesive intermediate layer is proposed, describing its structure and properties, which can be used to determine internal shrinkage and thermal stresses. The main patterns of changes in the adhesive strength of polymer powder coatings are established depending on initial, process, and operational factors, including the simultaneous action of several of these factors. Both data available in the scientific and technical literature and the results of experimental studies are used.</p>","PeriodicalId":784,"journal":{"name":"Technical Physics Letters","volume":"52 3","pages":"155 - 158"},"PeriodicalIF":0.8,"publicationDate":"2026-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148323666","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Mathematical Model of a Low-Pressure RF Discharge with PCL at the Surface of a Solid Body 固体表面PCL低压射频放电的数学模型
IF 0.8 4区 物理与天体物理
Technical Physics Letters Pub Date : 2026-06-28 DOI: 10.1134/S1063785026700215
A. Yu. Shemakhin
{"title":"Mathematical Model of a Low-Pressure RF Discharge with PCL at the Surface of a Solid Body","authors":"A. Yu. Shemakhin","doi":"10.1134/S1063785026700215","DOIUrl":"10.1134/S1063785026700215","url":null,"abstract":"<p>A mathematical model of a radio-frequency low-pressure inductively coupled discharge, taking into account a positive charge layer at the surface of a solid body, has been developed. The model involves the equations of continuity for electrons and ions and Maxwell’s equations in a transformed form using the method of complex amplitudes. The model was verified and validated. The fields of electron and gas temperatures, densities of electrons and ions, and the magnetic and electric field strength of the vortex component of the electromagnetic field were calculated. Overheating zones on the periphery of the flow were identified. By creating a one-dimensional dynamic model, initial approximations for the problem of finding the electron density in the discharge have been developed.</p>","PeriodicalId":784,"journal":{"name":"Technical Physics Letters","volume":"52 3","pages":"175 - 176"},"PeriodicalIF":0.8,"publicationDate":"2026-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148323669","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Mathematical Modeling of the Motion of Dispersed Particles near Streamlined Bodies 流线型物体附近分散粒子运动的数学建模
IF 0.8 4区 物理与天体物理
Technical Physics Letters Pub Date : 2026-06-28 DOI: 10.1134/S1063785026700331
I. V. Morenko
{"title":"Mathematical Modeling of the Motion of Dispersed Particles near Streamlined Bodies","authors":"I. V. Morenko","doi":"10.1134/S1063785026700331","DOIUrl":"10.1134/S1063785026700331","url":null,"abstract":"<p>The unsteady flow of a two-phase mixture around a cylindrical body is considered. Particular attention is paid to the interaction of dispersed particles with the surface and the structure of the hydrodynamic wake. The mathematical modeling of the motion of a two-phase medium is based on the Euler–Lagrangian approach. The continuity equation, Navier–Stokes equation, and energy equation are solved using the finite volume method. The influence of dispersed phase particles on the flow pattern, the drag of bodies, and surface heat transfer is assessed.</p>","PeriodicalId":784,"journal":{"name":"Technical Physics Letters","volume":"52 3","pages":"130 - 132"},"PeriodicalIF":0.8,"publicationDate":"2026-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148323746","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The Influence of the Composition and Treatment Conditions in an Electric Field on the Structure of Epoxy Composites for Obtaining Coating with Specified Characteristics 电场成分和处理条件对获得具有特定特性涂层的环氧复合材料结构的影响
IF 0.8 4区 物理与天体物理
Technical Physics Letters Pub Date : 2026-06-28 DOI: 10.1134/S1063785026700458
M. F. Galikhanov, E. N. Mochalova, T. T. Musaev
{"title":"The Influence of the Composition and Treatment Conditions in an Electric Field on the Structure of Epoxy Composites for Obtaining Coating with Specified Characteristics","authors":"M. F. Galikhanov,&nbsp;E. N. Mochalova,&nbsp;T. T. Musaev","doi":"10.1134/S1063785026700458","DOIUrl":"10.1134/S1063785026700458","url":null,"abstract":"<p>The article considers the effect of composition (the ratio of epoxy resin, hardeners, and modifiers), curing conditions (temperature, time), and physical modification (application of a constant electric field) on the gel fraction value, which can be used to predict how the material will behave during operation as an electret coating. The relationship between the structure and mechanical properties of epoxy polymers is shown using the example of systems including DER-331 epoxy resin, hardeners of different nature (anhydride hardener, amine-based hardeners of different structure), hardened with or without imposing an external constant electric field.</p>","PeriodicalId":784,"journal":{"name":"Technical Physics Letters","volume":"52 3","pages":"92 - 94"},"PeriodicalIF":0.8,"publicationDate":"2026-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148323885","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Heat and Mass Transfer under Dissociate Gas Flowing around Blunt Bodies 解离气体绕钝体流动时的传热传质
IF 0.8 4区 物理与天体物理
Technical Physics Letters Pub Date : 2026-06-28 DOI: 10.1134/S1063785026700094
V. F. Formalev, S. A. Kolesnik, B. A. Garibyan
{"title":"Heat and Mass Transfer under Dissociate Gas Flowing around Blunt Bodies","authors":"V. F. Formalev,&nbsp;S. A. Kolesnik,&nbsp;B. A. Garibyan","doi":"10.1134/S1063785026700094","DOIUrl":"10.1134/S1063785026700094","url":null,"abstract":"<p>Convective and diffusion heat fluxes and surface temperatures of blunt cones of high-speed aircraft have been determined using an approximate analytical solution of a system of equations for the dynamic, thermal, and diffusion boundary layers. In the approximation of a binary gas mixture consisting of oxygen and nitrogen atoms and molecules, the physical and mathematical boundary layer model has been reduced, using the Lees‒Dorodnitsyn variables, to a nonlinear system of ordinary differential equations accounting for the dissociation, recombination, and catalytic activity of the body’s surface. To determine the surface temperature of a blunt body, the balance of supplied convective and diffusion heat fluxes, as well as fluxes removed into the body by radiation and conduction has been investigated. In the developed solution method, heat fluxes and surface temperature at the forward stagnation point have first been determined and, then, using the Avduevsky’s variable, heat fluxes and temperatures have been found taking into account the pressure gradient across the entire blunt body’s surface. Numerous results on heat fluxes and surface temperatures in wide ranges of the Mach number, atomic component concentrations, and catalytic recombination coefficients have been obtained.</p>","PeriodicalId":784,"journal":{"name":"Technical Physics Letters","volume":"52 2","pages":"49 - 55"},"PeriodicalIF":0.8,"publicationDate":"2026-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148323921","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Evaluation of the Asymmetry of the Structure of a Compensatory Homeostat in the LT Basis of Physical Coordinates 在物理坐标的LT基础上评价代偿性稳态器结构的不对称性
IF 0.8 4区 物理与天体物理
Technical Physics Letters Pub Date : 2026-06-28 DOI: 10.1134/S1063785026700070
A. B. Bushuev, V. I. Boykov, S. V. Bystrov, O. S. Nuya, M. V. Serzhantova
{"title":"Evaluation of the Asymmetry of the Structure of a Compensatory Homeostat in the LT Basis of Physical Coordinates","authors":"A. B. Bushuev,&nbsp;V. I. Boykov,&nbsp;S. V. Bystrov,&nbsp;O. S. Nuya,&nbsp;M. V. Serzhantova","doi":"10.1134/S1063785026700070","DOIUrl":"10.1134/S1063785026700070","url":null,"abstract":"<p>A mathematical model of a technical contradiction for inventive problems in the form of a compensatory homeostat is considered. The model uses nonlinear predator–prey equations for population development. A method for numerically estimating the asymmetry of the structure of equations based on the dimensional theory of physical quantities is proposed. The dimensions of physical quantities are presented in the LT basis of R.O. Bartini. Assessing the asymmetry allows one to select the most acute of several technical contradictions of one problem and use it to improve the result within the framework of the theory of inventive problem solving.</p>","PeriodicalId":784,"journal":{"name":"Technical Physics Letters","volume":"52 2","pages":"31 - 38"},"PeriodicalIF":0.8,"publicationDate":"2026-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148323554","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
An Experimental Tool for Monitoring Air-Supply Systems and Diagnostic Parameters of the Operation of Agricultural-Machine ICEs 农业机械制冷系统供气系统监测及运行诊断参数的实验工具
IF 0.8 4区 物理与天体物理
Technical Physics Letters Pub Date : 2026-06-28 DOI: 10.1134/S1063785026700525
Yu. V. Kataev, A. S. Sayapin, E. V. Pestryakov, M. N. Kostomakhin, N. A. Petrishchev
{"title":"An Experimental Tool for Monitoring Air-Supply Systems and Diagnostic Parameters of the Operation of Agricultural-Machine ICEs","authors":"Yu. V. Kataev,&nbsp;A. S. Sayapin,&nbsp;E. V. Pestryakov,&nbsp;M. N. Kostomakhin,&nbsp;N. A. Petrishchev","doi":"10.1134/S1063785026700525","DOIUrl":"10.1134/S1063785026700525","url":null,"abstract":"<p>The issue is examined of the necessity of increasing the level of control of the condition of an air filter on the basis of vacuum in the intake tract of an ICE, as well as assessment of crankcase gases and the speed and acceleration of the crankshaft with the use of a developed experimental tool. The foundation has been presented of the necessity of introducing the proposed tool, which allows the risk of dust wear of the cylinder-piston assembly to be minimized, as well as the overall condition of the performance characteristics of diesel engines, etc., for operational assessment of technical condition. An experimental prototype is presented of a control tool that allows an operator to operationally carry out an assessment of the current condition of an air-purification system in the course of use to carry out prophylactic work in a timely manner on providing the necessary volume of gas supply into a diesel engine when carrying out field work.</p>","PeriodicalId":784,"journal":{"name":"Technical Physics Letters","volume":"52 4","pages":"179 - 188"},"PeriodicalIF":0.8,"publicationDate":"2026-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148323620","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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