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Acta Metallurgica Sinica(English Letters) 2018年第5期31卷 547-551页

作者： Bao-Hai Yu v.E.Ovcharenko k.v.ivanov A.A.Mokhovikov Yan-Hui Zhao Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China Tomsk Polytechnic University Tomsk 634050 Russia Institute of Strength Physics and Materials Science Siberian Branch of the Russian Academy of Sciences Tomsk 634021Russia

This paper reports TiC–（Ni–Cr） metal ceramic alloy（ratio of components 50：50） with nanoscaled components formed in the surface layer and smoothly transformed into the initial inner structure throughout the material under pulsed electron irradiation of the alloy surface. Principal changes in the surface layer are ascribed to the formation of gradient structure leading to the increase in wear resistance of the surface layer, drop of friction coefficient and improvement of specimen bending resistance when stressing on the irradiated surface side. The above changes of tribological and strength properties in the surface layer under pulsed electron irradiation become more apparent with increasing atomic mass of a plasma-forming inert gas.

关键词： Metal ceramic alloy Particle-reinforced composite Interphase boundaries Tribological behavior Bending strength Electron beam treatment

Structure Thermostability and Creep Regularities of Nanostructured Copper and Cu-0.5 wt.% Al2O3 Composite

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Structure Thermostability and Creep Regularities of Nanostru...

Ordered exponential and its features in Yang-Mills effective action

第十三届国际复合材料会议

作者： Yu.R.kolobov G.P.Grabovetskaya k.v.ivanov R.k.Islamgaliev W.Buchgraber Institute of Strength Physics and Material Science RAS Tomsk Russia 634021 Institute of Mechanics RAS Ufa Russia 450025 Austian Research Center Siebersdorf Austria 2444

Comparative investigations on thermostability and creep regularities of nanostructured copper and Cu-0.5 wt. % AlO composite in the states after extrusion (state 1) and after extrusion followed by severe torsion deformation under high pressure (nanostructured state 2) in the temperature interval of 423-773 k at the creep rates of 10-10s have been carried out. It has been established by TEM that the presence of nanosized (10-20 nm) panicles of strengthening AlO phase in the composite enhances the temperature of recrystallization beginning for the cooper matrix (initial grain size is -0.5μm) from 473 up to 773 k.

关键词： copper nanostructured composite severe plastic deformation creep

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Communications in Theoretical Physics 2023年第8期75卷 119-127页

作者： A v ivanov N v kharuk St.Petersburg Department of Steklov Mathematical Institute of Russian Academy of Sciences 27 FontankaSt.Petersburg 191023Russia Leonhard Euler International Mathematical Institute 10 Pesochnaya nab.St.Petersburg 197022Russia

In this paper,we discuss some non-trivial relations for ordered exponentials on smooth Riemannian *** an example of application,we study the dependence of the four-dimensional quantum Yang–Mills effective action on the special gauge transformation with respect to the background ***,we formulate some open questions about a structure of divergences for a special type of regularization in the presence of the background field formalism.

关键词： Yang-Mills effective action ordered exponential heat kernel Green's function short-distance asymptotics cutoff regularization Synge's world function

Results of the Main Phase of Ion Separation in the Process of Plasma-Optical Mass Separation

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Plasma Science and Technology 2015年第10期17卷 862-868页

作者： v.M.BARDAkOv S.D.ivanov A.v.kAZANTSEv N.A.STROkIN Institute for Physics and Technology Irkutsk State Technical University

This paper presents separation results of a mixture of nitrogen, argon and krypton ions in the process of plasma-optical mass separation on the POMS-E-3 separator model. We determined the behavior of the separation with a change in the value of magnetic field induction in the azimuthator and in the degree of compensation of the spatial charge in ion flows. An analysis is performed for experimental data by correlation with the results of a theoretical study and numerical experiments. The objectives of future experiments are outlined.

关键词： plasma-optical mass separation plasma accelerator trajectories spatial charge

Anomalous acceleration of ions in a plasma accelerator with an anodic layer

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Plasma Science and Technology 2018年第3期20卷 95-105页

作者： v M BARDAkOv S D ivanov A v kAZANTSEv N A STROkIN A N STUPIN Binhao JIANG Zhenyu WANG Irkutsk State Transport University Chernyshevsky Str.15664074IrkutskRussia National Research Irkutsk Technical University Lermontova Str.83664074IrkutskRussia Department of Electrical Engineering Harbin Institute of TechnologyHarbin 150001People's Republic of China

In a plasma accelerator with an anodic layer(PAAL),we discovered experimentally the effect of‘super-acceleration'of the bulk of the ions to energies W exceeding the energy equivalent to the discharge voltage v_(d).The E×B discharge was ignited in an environment of atomic argon and helium and molecular *** charged argon ions were accelerated most effectively in the case of the largest discharge currents and pressure P of the working *** ions with W〉ev_(d)(e being the electron charge)were only recorded at maximum *** nitrogen was not accelerated to energies W〉e v_(d).Anomalous acceleration is realized in the range of radial magnetic fields on the anode 2.8×10^(–2)≤B_(rA)≤4×10^(–2)*** was also found analytically that the cathode of the accelerator can receive anomalously accelerated *** this case,the value of the potential in the anodic layer becomes higher than the anode potential,and the anode current exceeds some critical *** modeling in terms of the developed theory showed qualitative agreement between modeling data and measurements.

关键词： plasma sources particle orbit and trajectory particle measurements

Argo floats revealing bimodality of large-scale mid-depth circulation in the North Atlantic

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Acta Oceanologica Sinica 2008年第2期27卷 1-10页

作者： CHU Peter C ivanov Leonid M MELNICHENkO Oleg v LI Rongfeng Department of Oceanography Naval Postgraduate School Monterey California USA International Pacific Research Center University of Hawaii at Manoa Hawaii USA Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 China

Analysis of Argo float trajectories at 1 000 m and temperature at 950 m in the North Atlantic between November 2003 and January 2005 demonstrates the existence of two different circulation modes with fast transition between them. Each mode has a pair of cyclonic - anticyclonic gyres. The difference is the location of the cyclonic gyre. The cyclonic gyre stretches from southeast to northwest in the first mode and from the southwest to the northeast in the second mode. The observed modes strongly affect the heat and salt transport in the North Atlantic. In particular, the second mode slows down the westward transport of the warm and saline water from the Mediterranean Sea.

关键词： Argo trajectory data Atlantic Ocean biomodality mid-depth circulation optimal spectral decomposition

SIMULATION OF vIBRATIONAL STATUS OF GAS—TURBINE ENGINE

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Chinese Journal of Aeronautics 1992年第1期 40-44页

作者： Samokchin v ivanov A Moscow Aviation Institute

In this paper three types of mathematic models have been established to predict thevibrational characteristics of gas-turbine engine. Nonaxisymmetric models are used tosimulate the support structures of real engines. Bending, pitching and torsion modes underfree and forced vibration are all considered in the calculation with satisfied accuracy. Forthe axisymmetric and nonaxisymmetric models of gas turbine engines, the relationship betweenamplitude and frequency response under forced vibration is obtained by experimentalways. The different relationship between amplitude and frequeney response at differentsection of an engine could be developed by the further research of the axisymmetricmathematic models.

关键词： SIMULATION OF vIBRATIONAL STATUS OF GAS TURBINE ENGINE

Highly transparent ytterbium doped yttrium lanthanum oxide ceramics

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Journal of Rare Earths 2014年第3期32卷 254-258页

作者： M.ivanov Yu.kopylov v.kravchenko 李江 A.Medvedev 潘裕柏 Institute of Electrophysics UrB of RAS 106Amundsena 620016 Ekaterinburg Russia Institute of Radioengineering and Electronics named after v.A. kotelnikov RAS Vvedensky Sq. 1 Fryazino Moscow region 141120 Russia Shanghai Institute of Ceramics Chinese Academy of Science Ural Federal University 19 Mira 620002 Ekaterinburg Russia

To prepare ytterbium doped lanthania yttria nanopowder a method of laser evaporation of mixed oxides was used. After calcinations of the powder at 1200 ℃ a pure single-phase solid solution yb3＋：（LaxY1-x）2O3 was formed in the nanoparticles. Influence of lanthanum oxide as an isovalent additive on the yttria structure was investigated. The lanthanium ions were proved to be a good aid to sinter yttria ceramics doped with Yb3＋ at moderate temperatures about 1650 ℃. The ceramics with relative density higher than 99.99% and grain size about 40 μm were fabricated. Full transmittance of 1.8 mm thick Yb0.11 La0.23Y1.66O3 ceramics reached 82.5% at 800 nm. This material could be a good gain medium for ytterbium high power pulse lasers.

关键词： RE-doped ceramics nanopowders ytterbium oxide transparency

A 96-antenna radioheliograph

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Research in Astronomy and Astrophysics 2014年第7期14卷 864-868页

作者： Sergey v.Lesovoi Alexander T.Altyntsev Eugene F.ivanov Alexey v.Gubin Institute of Solar-Terrestrial Physics

Here we briefly present some design approaches for a multifrequency 96-antenna radioheliograph. The configuration of the array antenna, transmission lines and digital receivers is the main focus of this work. The radioheliograph is a T-shaped centrally condensed radiointerferometer operating in the frequency range 4–8 *** justification for the choice of such a configuration is discussed. The signals from antennas are transmitted to a workroom by analog optical links. The dynamic range and phase errors of the microwave-over-optical signal are considered. The signals after downconverting are processed by digital receivers for delay tracking and fringe stopping. The required step of delay tracking and data rates are considered. Two 3-bit data streams（I and Q） are transmitted to a correlator with the transceivers embedded in Field Programmed Gate Array chips and with PCI Express cables.

关键词： telescopes -- instrumentation: interferometers -- Sun: radio radiation

Stages and Fracture Mechanisms of Lamellar Pearlite of 100-m-Long Differentially Hardened Rails Under Long-Term Operation Conditions

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Acta Metallurgica Sinica(English Letters) 2018年第12期31卷 1356-1360页

作者： A.A.Yuriev v.E.Gromov v.A.Grishunin Yu.F.ivanov R.S.Qin A.P.Semin LTD Evraz-Integrated West Siberian MetallurgicalCombine NovokuznetskRussia Siberian State Industrial University NovokuznetskRussia National Research Tomsk Polytechnic University TomskRussia Institute of High Current Electronics SD RAS TomskRussia School of Engineering and Innovation The Open UniversityWalton HallMilton Keynes MK 7 6AAUK

Using the methods of transmission electron microscopy, the carbide phase evolution in surface layers of the differentiallyquenched rails is studied after the passed tonnage of 691.8 million tons at the depth up to 10 mm along the central axis andfillet of rail head. The action of two mutual supplement mechanisms of steel carbide phase transformation in surface layersat rail operation is established：（1） cutting mechanism of cementite particles with the following departure in the volume offerrite grains or plates （in pearlite structure）; （2） cutting mechanism and following dissolution of cementite particles,transfer of carbon atoms on dislocations （in Cottrell atmospheres and dislocation cores）, transfer of carbon atoms bymoving dislocations into ferrite grains volume （or plates） with the following repeated formation of nanosized cementiteparticles. The first mechanism is accompanied by the change in linear sizes and morphology of carbide particles. Cementiteelement composition change is not essential. Carbide structure change can take place during the second mechanism.

关键词： Cementite Pearlite Fracture Rails Mechanisms Operation