Receiving the recipe of the compositions based
on UHMWPE with the assigned properties

S. V. Panin, N. Yu. Grishaeva, P. A. Lyukshin, B. A. Lyukshin,
I. L. Panov, S. A. Bochkareva, N. Yu. Matolygina, V. O. Alexenko

In the manufacture of products instead of unfilled polymers, such as ultra-high molecular weight polyethylene (UHMWPE), it is more effective to use composite systems with reinforcing inclusions. The paper discusses the possibility of creating a composition with the given physical and mechanical properties. An approach to the determination of control parameters (phase composition, phase properties) is proposed, which give the material the specified effective properties or their entry into predetermined intervals. In accordance with this approach, based on the analysis of experimental data containing information about the effective characteristics depending on the values of the control parameters, the corresponding surfaces of the response of physical and mechanical characteristics to the values of the control parameters are constructed in the state space. The obtained surfaces make it possible to identify the range of control parameters for the given characteristics of multi-component polymer compositions based on UHMWPE.

Keywords: experiment, multicomponent polymer compositions, effective mechanical characteristics, specified properties.

DOI: 10.30791/1028-978X-2018-10-5-14

Panin Sergey — Institute of Strength Physics and Materials Science Siberian Branch of Russian Academy of Sciences (2/4, pr. Akademicheskii, Tomsk, 634055, Russia), Dr Sci (Eng), professor, head of laboratory, specialist in the field mechanics of deformable solids. E-mail: svp@ispms.tsc.ru.

Grishaeva Natalia — Tomsk State University of Control Systems and Radioelectronics (40, Lenina Prospect, Tomsk, 634050, Russia), PhD (Phys-math), associate professor of mechanics and graphics Department, specialist in the field mechanics of deformable solids. E-mail: anohina@mail2000.ru.

Lyukshin Boris — Institute of Strength Physics and Materials Science Siberian Branch of Russian Academy of Sciences (2/4, pr. Akademicheskii, Tomsk, 634055, Russia), Dr Sci (Eng), leading researcher, professor, specialist in the field mechanics of deformable solids. E-mail: lba2008@yandex.ru.

Lyukshin Petr — Institute of Strength Physics and Materials Science Siberian Branch of Russian Academy of Sciences (2/4, pr. Akademicheskii, Tomsk, 634055, Russia), PhD
(Phys-math), senior researcher, specialist in the field mechanics of deformable solids. E-mail: petrljuk@ispms.tsc.ru.

Panov Ilia — National Research Tomsk State University, (36, Lenin Ave., Tomsk, 634050, Russia), graduate student, specialist in the field of applied mechanics. E-mail:
panov.iliya@mail.ru.

Bochkareva Svetlana — Institute of Strength Physics and Materials Science Siberian Branch of Russian Academy of Sciences (2/4, pr. Akademicheskii, Tomsk, 634055, Russia), PhD (Phys-math), researcher, specialist in the field mechanics of deformable solids. E-mail: svetlanab7@yandex.ru.

Matolygina Natalia — Institute of Strength Physics and Materials Science Siberian Branch of Russian Academy of Sciences (2/4, pr. Akademicheskii, Tomsk, 634055, Russia), PhD (Phys-math), researcher, specialist in the field mechanics of deformable solids. E-mail: ksa@ispms.tsc.ru.

Aleksenko Vladislav — Institute of Strength Physics and Materials Science Siberian Branch of Russian Academy of Sciences (2/4, pr. Akademicheskii, Tomsk, 634055, Russia), graduate student, engineer, specialist in the field mechanics of deformable solids. E-mail: vl.aleksenko@mail.ru.

Reference citing

Panin S. V., Grishaeva N. Yu., Lyukshin P. A., Lyukshin B. A.,
Panov I. L., Bochkareva S. A., Matolygina N. Yu., Alexenko V. O. Poluchenie receptury kompozicij s zadannymi svojstvami na osnove sverhvysokomolekulyarnogo poliehtilena [Receiving the recipe of the compositions based on UHMWPE with the assigned properties]. Perspektivnye Materialy — Advanced Materials (in Russ), 2017, no. 10, pp. 5 – 14. DOI: 10.30791/1028-978X-2018-10-5-14.

Behavior of capillary-porous systems with liquid lithium
under influence of pulsed deuterium plasma

A. V. Vertkov, A. V. Voronin, V. K. Gusev, E. V. Demina,
I. E. Lyublinskiy, V. N. Pimenov, M. D. Prusakova

Application of capillary-porous systems (CPS) with liquid lithium as perspective alternative to traditional structural materials (W, Be, CFC) is offered at creation of in-vessel elements contacting to plasma of stationary thermonuclear reactors. The behaviour of CPS with liquid lithium under pulsed stream of deuterium plasmas effect is considered. The basic processes determining high CPS stability to damage are revealed and the critical parameters defining CPS resistance are certain. The behaviour of tungsten-lithium CPS after its interaction with atmospheric gases is investigated in experiments on plasma facility in A.F. Ioffe physical-technical institute. The irradiated CPS samples have been investigated by methods of an optical and scanning electronic microscopy, local X-ray spectral and X-ray diffraction analyses. Measurements of surface temperature by means of a bicoloured pyrometer have been performed during deuterium plasma irradiation. The outcome of plasma effect on heavy oxidized CPS surface essentially differs from outcome for a pure surface: there are damages of CPS structure. The specific power of the plasma flow was
22 – 41 GW/m2, and the number of pulses per irradiated target was 100.

 

Keywords: capillary-porous systems, lithium, thermonuclear reactor, plasma gun, deuterium plasma.

DOI: 10.30791/1028-978X-2018-10-15-24

 

Vertkov Aleksey — JSC Krasnaya Zvezda (115230, Moscow, Electrolitny proezd, 1A), chief specialist, PhD (Eng), specialist in the field of engineering-physical and material science problems of thermonuclear and space energy. E-mail: AVVertkov@redstaratom.ru.

Voronin Aleksandr — A.F. Ioffe Physical­Technical Institute (PTI, Russia, Sankt­Petersburg, Polytechnic Str., 26 ), PhD (Eng), senior researcher, specialist in plasma physics. E­mail: voronin.mhd@mail. ioffe.ru.

Gusev Vasily — A.F. Ioffe Physical­Technical Institute (PTI, Russia, Sankt­Petersburg, Polytechnic Str., 26), Dr Sci (Phys­Math), chief researcher, specialist in plasma physics. E­mail: Vasily.Gusev@mail.ioffe.ru.

Demina Elena — Baikov Institute of Metallurgy and Materials Science of RAS, (Russia, Moscow, 119991 Leninskiy pr. 49), PhD (Eng), leading researcher, specialist in the field of radiation and space materials science. E­mail: elenadyom@mail.ru. 

Lublinsky Igor — JSC Krasnaya Zvezda (115230, Moscow, Electrolitny proezd, 1A), chief specialist, PhD (Eng), head of the department, candidate of technical sciences, senior researcher, associate professor of the National Research Nuclear University MIFI, (115409, Moscow, Kashirskoye Shosse, 31), a specialist in the field of engineering-physical and material science problems of thermonuclear and space energy. E-mail: IELyublinskiy@redstaratom.ru.

Pimenov Valeri — Baikov Institute of Metallurgy and Materials Science of RAS (Russia, Moscow, 119991 Leninskiy pr. 49), Dr Sci (Phys­Math), head of laboratory, specialist in the field of radiation and space materials science. E­mail:pimval@mail.ru.

Prusakova Marina — Baikov Institute of Metallurgy and Materials Science of RAS (Russia, Moscow, 119991 Leninskiy pr.49), researcher, specialist in the field of radiation and space materials science. E­mail: prusakovam@mail.ru.

Reference citing

Vertkov A. V., Voronin A. V., Gusev V. K., Demina E. V.,
Lyublinskiy I. E., Pimenov V. N., Prusakova M. D. Issledovanie povedeniya kapillyarno-poristyh sistem s zhidkim litiem pri vozdejstvii impul'snoj dejterievoj plazmy [Behavior of capillary-porous systems with liquid lithium under influence of pulsed deuterium plasma]. Perspektivnye Materialy — Advanced Materials (in Russ), 2017, no. 10, pp. 15 – 24. DOI: 10.30791/1028-978X-2018-10-15-24

 
Radiation hardening of Eurofer’97 steel under Fe ions irradiation

S. V. Rogozhkin, A. A. Nikitin, A. A. Khomich, N. A. Iskandarov,
V. V. Khoroshilov, A. A. Bogachev, A. A. Lukyanchuk,
O. A. Raznitsyn, A. S. Shutov, T. V. Kulevoy, P. A. Fedin,
A. L. Vasiliev, M. Yu. Presnyakov

Low-temperature radiation hardening of perspective structural steel Eurofer’97 as the material for the first wall of DEMO fusion reactor is studied in this work. Specimens of Eurofer’97 steel were irradiated with Fe ions up to 10 dpa fluence under temperatures 250, 300 and 400 °C. Irradiated samples were studied by transmission electron microscopy and atom probe tomography methods. TEM study of irradiated samples shown preferential formation of dislocation loops under all irradiated temperatures. Pair-correlation function analysis detected initial stage of matrix solid-solution decomposition of Eurofer 97 steel only under
400 °C temperature. Detected microscopic changes and calculated hardening in the frame works of DBH model have shown that dislocation loops formation is the main reason of low temperature radiation hardening of Eurofer’97 under irradiation by Fe ions with fluence up to 10 dpa.

Keywords: ferritic-martensitic steel, Eurofer’97, radiation hardening, dislocation loops, transmission electron microscopy, atom probe tomography, simulation experiment, ion irradiation.

DOI: 10.30791/1028-978X-2018-10-25-34

Rogozhkin Sergey — Institute for Theoretical and Experimental Physics named by
A.I. Alikhanov of National Research Centre “Kurchatov Institute” (Moscow, 117218, Bol’shaya Cheremushkinskaya st., 25), Dr Sci (Phys-Math), head of department, specialist in condensed matter physics. E-mail: sergey.rogozhkin@itep.ru.

Nikitin Aleksandr — Institute for Theoretical and Experimental Physics named by
A.I. Alikhanov of National Research Centre “Kurchatov Institute” (Moscow, 117218, Bol’shaya Cheremushkinskaya st., 25), PhD (Phys-Math), senior researcher, specialist in ultramicroscopy and materials science. E-mail: aleksandr.nikitin@gmail.com.

Khomich Artem — Institute for Theoretical and Experimental Physics named by
A.I. Alikhanov of National Research Centre “Kurchatov Institute” (Moscow, 117218, Bol’shaya Cheremushkinskaya st., 25), engineer, specialist in atom probe tomography. E-mail: artem.khomich@gmail.com.

Iskandarov Nasib Amirkhan-ogly — Institute for Theoretical and Experimental Physics named by A.I. Alikhanov of National Research Centre “Kurchatov Institute” (Moscow, 117218, Bol’shaya Cheremushkinskaya st., 25), researcher, specialist in ultramicroscopy. E-mail: Iskandarov@itep.ru.

Khoroshilov Vasily — Institute for Theoretical and Experimental Physics named by
A.I. Alikhanov of National Research Centre “Kurchatov Institute” (Moscow, 117218, Bol’shaya Cheremushkinskaya st., 25), engineer, specialist in scanning electron microscopy. E-mail: vkhoroshilov@gmail.com.

Bogachev Aleksei — Institute for Theoretical and Experimental Physics named by
A.I. Alikhanov of National Research Centre “Kurchatov Institute” (Moscow, 117218, Bol’shaya Cheremushkinskaya st., 25), researcher, specialist in transmission electron microscopy. E-mail: bogachev@itep.ru.

Lukyanchuk Anton — Institute for Theoretical and Experimental Physics named by
A.I. Alikhanov of National Research Centre “Kurchatov Institute” (Moscow, 117218, Bol’shaya Cheremushkinskaya st., 25), researcher, specialist in atom probe tomography. E-mail: Anton.Lukyanchuk@itep.ru.

Raznitsyn Oleg — Institute for Theoretical and Experimental Physics named by
A.I. Alikhanov of National Research Centre “Kurchatov Institute” (Moscow, 117218, Bol’shaya Cheremushkinskaya st., 25), researcher, specialist in atom probe tomography. E-mail: Oleg.Raznitsyn@itep.ru.

Shutov Anton — Institute for Theoretical and Experimental Physics named by
A.I. Alikhanov of National Research Centre “Kurchatov Institute” (Moscow, 117218, Bol’shaya Cheremushkinskaya st., 25), engineer, specialist in atom probe tomography. E-mail: Anton.Shutov@itep.ru.

Kulevoy Timur — Institute for Theoretical and Experimental Physics named by
A.I. Alikhanov of National Research Centre “Kurchatov Institute” (Moscow, 117218, Bol’shaya Cheremushkinskaya st., 25), PhD (Phys-Math), deputy director for science at accelerator department, specialist in particle accelerator physics. E-mail: kulevoy@itep.ru.

Fedin Peter — Institute for Theoretical and Experimental Physics named by
A.I. Alikhanov of National Research Centre “Kurchatov Institute” (Moscow, 117218, Bol’shaya Cheremushkinskaya st., 25), engineer, specialist in the field of accelerator physics. E-mail: Fedin-Petr1991@yandex.ru.

Vasiliev Alexander — National Research Centre “Kurchatov Institute” (123098 Russia, Moscow, Akademik Kurchatov sq., 1), PhD (Phys-Math), head of electron microscopy laboratory, specialist in electron microscopy. E-mail: a.vasiliev56@gmail.com.

Presnyakov Mikhail — National Research Centre “Kurchatov Institute” (123098 Russia, Moscow, Akademika Kurchatov sq., 1), PhD (Eng), head of PEM RC, specialist in electron microscopy. E-mail: mpresniakov@gmail.com.

Reference citing

Rogozhkin S. V., Nikitin A. A., Khomich A. A., Iskandarov N. A.,
Khoroshilov V. V., Bogachev A. A., Lukyanchuk A. A., Raznitsyn O. A.,
Shutov A. S., Kulevoy T. V., Fedin P. A., Vasiliev A. L., Presnyakov M. Yu.   Issledovanie mikroskopicheskih prichin radiacionnogo uprochneniya stali EUROFER 97 s pomoshch'yu imitacionnogo oblucheniya ionami [Radiation hardening of Eurofer’97 steel under Fe ions irradiation]. Perspektivnye Materialy — Advanced Materials (in Russ), 2017, no. 10, pp. 25 – 34. DOI: 10.30791/1028-978X-2018-10-25-34

 
Cermet plasma TiC – Cr3C2 – NiCr – Mo – C coatings

V. I. Kalita, A. A. Radyuk, D. I. Komlev, A. Yu. Ivannikov,
A. B. Mikhailova, A. V. Alpatov

To determine the possibility of maintaining the maximum possible carbon content in TiC carbide, a powder additionally doped with chromium carbide, molybdenum and carbon was produced by plasma spraying of the cermets of the TiC – NiCr system. To reduce the effect of gases from the air atmosphere, plasma spraying was carried out using a standard plasmatron, supplemented with a special nozzle. The analysis of the oxygen, nitrogen and carbon content in the powder manufacturing stages and in the coatings was carried out. The content of O and N is reduced in the sintering step for spraying a powder with respect to the content in the starting components, but increases again during spraying. In the coating, the quantitative distribution of the carbide phases was determined by their size. A change in the phase composition and dimensions of the crystal lattices of the phases in the powder for deposition and coatings was determined. The share of the main hardening TiC phase in the coating decreased by 9.7 % with respect to the initial mixture, but taking into account the newly formed carbide phases with the participation of chromium and molybdenum, the proportion of all the carbide phases in the coating increased by 12.7 %. The microhardness of the plasma coating at loads of 200 and 20 g indenter was 14.9 and 28.7 GPa, respectively. The reasons for the decrease in the actual microhardness of the cermet coating in relation to the theoretically possible one based on the volume fraction of the strengthening phases are analyzed.

Key words: plasma-spraying, nozzle to plasma torch, TiC cermet, mechanical alloying, carbon losses.

DOI: 10.30791/1028-978X-2018-10-35-46

Kalita Vasilii — Baikov Institute of Metallurgy and Material Science of RAS (Moscow, 119334, Leninsky Prospect, 49), Dr Sci (Eng), chief scientific officer, head of laboratory, specialist in the field of plasma spraying. E-mail: vkalita@imet.ac.ru.

Radiuk Aleksei — Baikov Institute of Metallurgy and Material Science of RAS (Moscow, 119334, Leninsky Prospect, 49), junior researcher, specialist in the field of plasma spraying. E-mail: imet-lab25@yandex.ru.

Komlev Dmitrii — Baikov Institute of Metallurgy and Material Science of RAS (Moscow, 119334, Leninsky Prospect, 49), PhD, leading researcher, specialist in the field of plasma spraying. E-mail: imet-lab25@yandex.ru.

Ivannikov Alexander — Baikov Institute of Metallurgy and Material Science of RAS (Moscow, 119334, Leninsky Prospect, 49), PhD, senior researcher, specialist in the field of plasma spraying. E-mail: imet-lab25@yandex.ru.

Mihajlova Aleksandra — Baikov Institute of Metallurgy and Material Science of RAS (Moscow, 119334, Leninsky Prospect, 49), PhD, senior researcher, specialist in the field of X-ray analysis. E-mail: sasham1@mail.ru.

Alpatov Alexander — Baikov Institute of Metallurgy and Material Science of RAS (Moscow, 119334, Leninsky Prospect, 49), PhD, senior researcher, specialist in the field of diagnostics of materials for the content of light elements. E-mail: alpat72@mail.ru.

Reference citing

Kalita V. I., Radyuk A. A., Komlev D. I., Ivannikov A. Yu., Mikhailova A. B., Alpatov A. V. Kermetnye plazmennye pokrytiya TiC – Cr3C2 – NiCr – Mo – C [Cermet plasma TiC – Cr3C2 – NiCr – Mo – C coatings]. Perspektivnye Materialy — Advanced Materials (in Russ), 2017, no. 10, pp. 35 – 46. DOI: 10.30791/1028-978X-2018-10-35-46

 
Conditions for obtaining “thick” amorphous wires
by the Ulitovsky-Taylor method

V. V. Molokanov, A. N. Shalygin, P. P. Umnov, T. R. Chueva,
N. V. Umnova, S. V. Simakov

The existing methods for obtaining amorphous wires of large diameters from the melt are considered. The advantages of the Ulitovsky – Taylor method for obtaining amorphous wires in a wide range of diameters with stable geometric characteristics are noted. Analysis of factors affecting the process of obtaining “thick” amorphous wires by a continuous version of the Ulitovsky – Taylor method was carried out. The necessity of using alloys with a high glass-forming ability and with melting temperatures of 950 – 1150 °C is shown. The practicability of introducing technological additives was justified (Nb, Mo, Cr, etc.). It was noted that to ensure a continuous process of producing a “thick” wire, it is necessary to use a high-purity precursor with stable geometric parameters. A variant of a quenching device for cooling a melt jet with a counterflow of water is proposed. The mechanism for removing the glass cover is based on the metal core elastic bend and the brittle cracking of glass. The technology of obtaining “thick” wires was tested. Obtained extended wires with diameter of 50 – 200 µm with a high level of properties. The amorphous micro- spirals and samples of medical articles were made. The obtained results can serve as a basis for the development and improvement of technology for producing “thick” amorphous wires of various compositions and for the manufacture of new types of medical instruments and products.

Keywords: “Thick” аmorphous wires, Ulitovsky-Taylor method, amorphous micro-coils.

 

DOI: 10.30791/1028-978X-2018-10-47-53

Molokanov Vyacheslav — Baikov Institute of Metallurgy and Materials Science (119334, Russia, Moscow, Leninsky pr. 49), Ph.D (Eng), senior research scientist, specialist in physico-chemical analysis and preparation of amorphous and nanocrystalline alloys. E-mail: molokano@imet.ac.ru.

Shalygin Aleksandr — R&D “VICHEL” (129110, Russia, Moscow, Prospekt mira, 61, b.1),
DrSci (Phys-Math), consultant, specialist in magnetism in metals.

 

Umnov Pavel — Baikov Institute of Metallurgy and Materials Science (119334, Russia, Moscow, Leninsky pr. 49), Ph.D, senior researcher, specialist in physico-chemical analys.

Chueva Tatiana — Baikov Institute of Metallurgy and Materials Science (119334, Russia, Moscow, Leninsky pr. 49), Ph.D, senior researcher, specialist in physico-chemical analysis and preparation of amorphous and nanocrystalline alloys. E-mail: chueva.tr@gmail.com.

Umnova Nadezhda — Baikov Institute of Metallurgy and Materials Science (119334, Russia, Moscow, Leninsky pr. 49), Ph.D, senior researcher, specialist in physico-chemical analys. E-mail: kurakova_n@mail.ru.

Simakov Sergey — Baikov Institute of Metallurgy and Materials Science (119334, Russia, Moscow, Leninsky pr. 49), Dr Sci (Phys-Math), head of laboratory, specialist in solid state physics. E-mail: simakov-sv@mail.ru.

Reference citing

Molokanov V. V., Shalygin A. N., Umnov P. P., Chueva T. R.,
Umnova N. V., Simakov S. V. Analiz faktorov, opredelyayushchih usloviya polucheniya “tolstyh” amorfnyh provodov metodom Ulitovskogo-Tejlora [Conditions for obtaining “thick” amorphous wires by the Ulitovsky-Taylor method]. Perspektivnye Materialy — Advanced Materials (in Russ), 2017, no. 10, pp. 47 – 53. DOI: 10.30791/1028-978X-2018-10-47-53

 
Application of low-temperature postradiation polymerization of polytetrafluoroethylene
for hydrophobization of porous
ceramic materials based on oxide fibers

D. P. Kiryukhin, A. S. Bespalov, V. M. Bouznik, D. V. Grashchenkov,
V. K. Ivanov, I. A. Zvereva, G. A. Kichigina, P. P. Kushch

Porous ceramic materials based on oxide fibers, which have lower specific density and thermal conductivity, are able to function at temperatures exceeding 1000 °C, including in the oxidizing atmosphere, which allows this class of materials to have a wide range of applications in various industries. The disadvantage of such materials is the hydrophilicity caused by the chemical composition of the fibers and the highly developed porous structure, which severely limits their use, particularly in arctic and subarctic climates characterized by high humidity. The authors have investigated and proposed a method of hydrophobization using the technology of low-temperature postradiation graft polymerization of tetrafluoroethylene molecules. The technology makes it possible to apply polymer coatings to oxide fibers, providing high hydrophobic properties, which is manifested in the increased value of the contact angle of wetting the surface of the material, which in turn substantially improves their operational characteristics and expands the possibilities of practical application as heat-shielding and heat-insulating materials.

Key words: hydrophobicity, low-temperature post-radiation grafting, tetrafluoroethylene, ceramic material, oxide fibers.

DOI: 10.30791/1028-978X-2018-10-54-62

Kiryukhin Dmitriy — Institute of Problems of Chemical Physics of RAS (Chernogolovka, 142432, Academician Semenov avenue 1), Dr Sci (Chem), head of laboratory, specialist in the field of radiation chemistry, cryogenic chemistry. E-mail: kir@icp.ac.ru.

Bespalov Alexander — All-Russian Scientific Research Institute of Aviation Materials (Moscow, 105005, Radio str. 17), engineer, specialist in the field of high-temperature heat-shielding and heat-insulating materials. E-mail: 41mep@mail.ru.

Bouznik Vyacheslav — All-Russian Scientific Research Institute of Aviation Materials (Moscow, 105005, Radio str. 17); National Research Tomsk State University (Tomsk, 634050, Lenin avenue 36), academician of Russian Academy of Sciences, Dr Sci (Chem), head of laboratory. E-mail: bouznik@ngs.ru.

Grashchenkov Denis — All-Russian Scientific Research Institute of Aviation Materials (Moscow, 105005, Radio str. 17), PhD (Eng), head of research department, specialist non-metallic materials, metal composite materials and heat protection. E -mail: grashchenkovdv@mail.ru.

Ivanov Vladimir — Kurnakov Institute of General and Inorganic Chemistry of RAS (Moscow, 119991, Lenin avenue 31), Corresponding Member of RAS, Dr Sci (Chem), director of Institute, specialist in the field of chemistry and technology of inorganic materials. E-mail: van@igic.ras.ru.

Zvereva Irina — St. Petersburg State University (St. Petersburg, 199034, University Embankment 7/9), Dr Sci (Chem), director of the Resource Center «Thermogravimetric and calorimetric methods of research» of the Science Park of St. Petersburg State University, specialist in the field of inorganic chemistry, inorganic materials science, photocatalysis. E-mail: irina.zvereva@spbu.ru.

Kichigina Galina — Institute of Problems of Chemical Physics of RAS (Chernogolovka, 142432, Academician Semenov avenue 1), PhD (Chem), senior researcher, specialist in the field of radiation chemistry, cryogenic chemistry. E -mail: kga@icp.ac.ru.

Kushch Pavel — Institute of Problems of Chemical Physics of RAS (Chernogolovka, 142432, Academician Semenov avenue 1), PhD (Chem), senior researcher, specialist in the field of radiation chemistry, telomeres. E -mail: kpp@icp.ac.ru.

Reference citing

Kiryukhin D. P., Bespalov A. S., Bouznik V. M., Grashchenkov D. V.,
Ivanov V. K., Zvereva I. A., Kichigina G. A., Kushch P. P. Primenenie nizkotemperaturnoj postradiacionnoj privivochnoj polimerizacii politetraftorehtilena dlya gidrofobizacii poristyh keramicheskih materialov na osnove oksidnyh volokon [Application of low-temperature postradiation polymerization of polytetrafluoroethylene for hydrophobization of porous ceramic materials based on oxide fibers]. Perspektivnye Materialy — Advanced Materials (in Russ), 2017, no. 10, pp. 54 – 62. DOI: 10.30791/1028-978X-2018-10-54-62

 
SHS-metallurgy of binary silicides (MoW) Si2 for sintering composite materials

V. A. Gorshkov, P. A. Miloserdov, D. D. Titov,
V. I. Yukhvid, Yu. F. Kargin

The regularities of synthesis by the SHS-metallurgy method of cast materials in the Mo-W-Si system are studied. The experiments were carried out in SHS-reactors with a volume of 3, 20 and 30 liters under the pressure of an inert gas (argon) P = 5 MPa. In the experiments, high-calorie mixtures of molybdenum (6) and tungsten (6) oxides with aluminum and silicon were used. Thermodynamic calculation of combustion parameters of the initial systems according to the “Thermo” program showed that they have high adiabatic combustion temperatures exceeding the melting points of the initial reagents and final products of synthesis. Studies have shown a strong effect of the ratio of the initial reagents on the regularities of synthesis. Cast (ingots) single-phase disilicides of molybdenum (MoSi2) and tungsten (WSi2), as well as their solid solutions MoSi2 – WSi2, are obtained with any given ratio between them. Their microstructure, elemental and phase composition were investigated. Optimal modes of mechanical conversion of the obtained ingots of the target products into the powders of the required fractions are developed. The influence of the composition of composites on the strength and oxidation of sintered samples in air at different temperatures was studied. It was shown that sintered composites from MoSi2 – WSi2 solutions have higher strength and are less susceptible to oxidation compared to ceramics obtained by solid-phase sintering from powders of individual MoSi2 and WSi2.

 

Keywords: binary silicides of molybdenum and tungsten, solid solutions, SHS-metallurgy, gravitational separation, phase composition and microstructure, silicide powders, solid-phase sintering, composites.

 

DOI: 10.30791/1028-978X-2018-10-63-72

Gorshkov Vladimir — Merzhanov Institute of Structural Macrokinetics and Materials Science of RAS (Moscow Region, Noginsk District, Chernogolovka, 142432, Academician Osipyan st. 8), Dr Sci (Eng), leading researcher, specialist in combustion and materials science. E-mail: gorsh@ism.ac.ru.

Miloserdov Pavel — Merzhanov Institute of Structural Macrokinetics and Materials Science of RAS (Moscow Region, Noginsk District, Chernogolovka, 142432, Academician Osipyan st. 8), PhD, researcher, specialist in combustion and materials science. E-mail: yu_group@ism.ac.ru.

Titov Dmitriy — Baikov Institute of Metallurgy and Material Science of RAS (Moscow, 119334, Leninsky Prospect, 49), PhD, senior researcher, specialist in material scince. E-mail: mitytitov@gmail.com.

Yukhvid Vladimir — Merzhanov Institute of Structural Macrokinetics and Materials Science of RAS (Moscow Region, Noginsk District, Chernogolovka, 142432, Academician Osipyan st.  8), Dr Sci (Eng), chief scientific officer, specialist in combustion and materials science. E-mail: yukh@ism.ac.ru.

Kargin Yuriy — Baikov Institute of Metallurgy and Material Science of RAS (Moscow, 119334, Leninsky Prospect, 49), PhD, leading researcher, specialist in material scince. E-mail: yu.kargin@rambler.ru.

Reference citing

Gorshkov V. A., Miloserdov P. A., Titov D. D., Yukhvid V. I., Kargin Yu. F. SVS-metallurgiya binarnyh silicidov (MoW)Si2 dlya spekaniya kompozitnyh materialov [SHS-metallurgy of binary silicides (MoW) Si2 for sintering composite materials]. Perspektivnye Materialy — Advanced Materials (in Russ), 2017, no. 10, pp. 63 – 72. DOI: 10.30791/1028-978X-2018-10-63-72

 
The way of impregnation of porous carbon-graphite material by casting aluminum alloy without use
of the autoclave

V. A. Gulevskii, L. V. Vinogradov, V. I. Antipov,
N. Yu. Miroshkin, A. G. Kolmakov,
V. I. Kostikov, Yu. E. Mukhina, E. E. Baranov

The possibility of impregnation of carbon-graphite porous material by casting aluminum alloys without use of complicated autoclave equipment has been investigated. Overpressure which is necessary to flow aluminum melt into open pores of carbon-graphite frame has been provided by difference of the coefficients of thermal expansion (CTE) between matrix aluminum alloy and the impregnating steel chamber. Blank made from the porous carbon-graphite material AG-1500 type with pores size 10 - 80 microns and open porosity — 14 – 15%, was exposed to the impregnation by casting aluminum alloy AK12 type in the cup-like hermetically sealed cameras made of two various steels — St30Kh and St45. At the same time, the camera was exposed by ultrasound influence during impregnation. Obtained composite has dense skeleton-like structure in which the aluminum matrix penetrated into a porous carbon-graphite framework. During studying the process of impregnation, it was established that in the beginning under the influence of ultrasonic waves there is a partial filling of an open pores. Finally, they are filled because of the excessive pressure arising due to difference in CTE between matrix fusion of aluminum and a steel wall of the impregnating camera. As a result about 60 – 80 % of carbon-graphite framework pores were filled that corresponds to optimal filling of open porosity of material. It has been found that it is necessary for effective impregnation of a porous carbon-graphite framework by aluminum melt that the CTE of the impregnating melt exceeded 2.5 times the CTE of capacity material for impregnation. The received composite does not concede on the properties and quality to the products made by means of the complicated autoclave equipment.

Keywords: impregnation of porous carbon-graphite, casting aluminum alloys, autoclave equipment, the coefficient of thermal expansion.

DOI: 10.30791/1028-978X-2018-10-73-79

Gulevskiy Viktor — Volgograd State Technical University (Volgograd, 400131, ave. Lenina, 28), PhD (Eng), associate professor, specialist in the field of material science of carbon materials and metals. E-mail: mitlp@vstu.ru.

Vinogradov Leonid — Baikov Institute of Metallurgy and Materials Science of Russian Academy of Sciences (119334 Moscow, Leninskii pr. 49), PhD (Eng), senior scientific employee, specialist in the field of powder metallurgy, coverings and composite materials. E-mail: ltdvin@yandex.ru.

Antipov Valerij — Baikov Institute of Metallurgy and Materials Science of Russian Academy of Sciences (119334 Moscow, Leninskii pr. 49), PhD (Eng), senior scientific employee, specialist in the field of powder metallurgy, coverings and composite materials. E-mail: antipov@imet.ac.ru.

Miroshkin Nikolay — Volgograd State Technical University (Volgograd, 400131, Lenin Avenue 28), master, assistant, expert in the field of materials science, technology of foundry production.

Kolmakov Alexey — Baikov Institute of Metallurgy and Materials Science of Russian Academy of Sciences (119334 Moscow, Leninskii pr. 49), Dr. Sci (Eng), correspondent member of RAS, head of laboratory, specialist in the field of composition and nanomaterials, multifractal analysis, synergetrics. E-mail: kolmakov@imet.ac.ru.

Kostikov Valery — NITU MISIS (Moscow, 119049 Lenin ave., 4), correspondent member of RAS, professor, expert in the field of high-temperature constructional materials, powder metallurgy, carbon-graphite materials and coverings. E-mail: vikost@bk.ru.

Mukhina Yulia — Baikov Institute of Metallurgy and Materials Science of Russian Academy of Sciences (119334 Moscow, Leninskii pr. 49), PhD (Eng), researcher, expert in the field of the structural analysis and physical chemistry of inorganic materials. E-mail: mukhina.j.e.imet@yandex.ru.

Baranov Eugenius — Baikov Institute of Metallurgy and Materials Science of Russian Academy of Sciences (119334 Moscow, Leninskii pr. 49), research worker, specialist in area of science of materials and physics of metals, E-mail: arefiy@mail.ru.

Reference citing

Gulevskii V. A., Vinogradov L. V., Antipov V. I., Miroshkin N. Yu., Kolmakov A. G.,
Kostikov V. I., Mukhina Yu. E., Baranov E. E. Razrabotka sposoba bezavtoklavnoj propitki poristogo uglegrafitovogo materiala litejnymi alyuminievymi splavami [The way of impregnation of porous carbon-graphite material by casting aluminum alloy without use of the autoclave]. Perspektivnye Materialy — Advanced Materials (in Russ), 2017, no. 10, pp. 73 – 79. DOI: 10.30791/1028-978X-2018-10-73-79

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