PERSPEKTIVNYE MATERIALY
2023, No.9
Intermetallic alloys based on γ¢Ni3Al.
Part I. Features of the structure, formation
of (γ'+γ) structures and alloying
A. A. Drozdov, K. B. Povarova, O. A. Bazyleva, A. V. Antonova, M. A. Bulakhtina,
N. A. Aladyev, A. E. Morozov, I. S. Pavlov
Foundry alloys based on γ¢Ni3Al have a lower density, a higher melting point and resistance to oxidation, a higher ceiling of operating temperatures than modern heat-resistant nickel alloys (ZhNS). The article discusses the features of the electronic structure and crystallization of domestic (VKNA type/VIN) and the most advanced foreign (γ'+γ) low-alloyed alloys (type IC) based on γ¢Ni3Al, experimental data on the nature of structures formed during directed crystallization of alloys with different types of alloying, on the nature of the distribution of components in γ¢Ni3Al and γNi phases and structural components in the cellular-dendritic structure of single crystals with crystallographic orientation are presented <111> and <001>. The effect of heat treatment in a wide range of temperature-time parameters on the microstructure, distribution of alloying elements and mechanical properties of alloys of the VKNA type is investigated. A comparative analysis of the effect of temperature and duration of heat treatment and the cooling rate after heat treatment on the heat resistance of alloys showed that, unlike other Ni3Al-based alloys, for single crystals made of economically alloyed alloys of the VKNA type and parts made of them (uncooled working blades of aviation gas turbine engines, nozzle apparatuses, jet nozzle spacers and other parts a short-term maintenance (1150 °C / 1 h) is necessary and sufficient to relieve casting stresses. The alloys demonstrate high heat resistance at 1100 – 1200 °C and the ability to withstand temperature drops up to 1250 – 1300 °C for a short time.
Keywords:nickel aluminide; alloying; single crystal; directional crystallization; dendritic microliquation; heat treatment, structure; heat resistance.
DOI: 10.30791/1028-978X-2023-9-5-25
Drozdov Andrey — I.P. Bardin Central Research Institute for Ferrous Metallurgy (105005 Moscow, Radio st., 23/9, p. 2), PhD (Еng), deputy director of NPCPM, specialist in the field of powder metallurgy; Baikov Institute of Metallurgy and Materials Science Russian Academy of Sciences (119334 Moscow, Leninsky Prosp., 49), leading researcher, specialist in the field of heat-resistant materials and intermetallic alloys. E-mail: aadrozdov76@mail.ru.
Povarova Kira — Baikov Institute of Metallurgy and Materials Science Russian Academy of Sciences (119334 Moscow, Leninsky Prospect, 49), professor, Dr Sci (Еng), chief researcher, specialist in the field of heat-resistant materials, intermetallic compounds and heavy alloys. E-mail: kpovarova@imet.ac.ru.
Bazyleva Olga — NRC “Kurchatov Institute” — VIAM (105005 Moscow, Radio st., 17), PhD (Еng), leading researcher, specialist in the field of intermetallic alloys based on Ni3Al. E-mail: intermetallidbaz@gmail.com.
Antonova Anna — Baikov Institute of Metallurgy and Materials Science Russian Academy of Sciences (119334 Moscow, Leninsky Prospect, 49), PhD (Еng), senior researcher, specialist in the field of heat-resistant materials and intermetallic alloys. E-mail:
avantonova2005@mail.ru.
Bulakhtina Marina — Baikov Institute of Metallurgy and Materials Science Russian Academy of Sciences (119334 Moscow, Leninsky Prospect, 49), PhD (Еng), junior researcher, specialist in the field of heat-resistant materials and intermetallic alloys. E-mail: m_sm@inbox.ru.
Alad`ev Nikolay — Baikov Institute of Metallurgy and Materials Science Russian Academy of Sciences (119334 Moscow, Leninsky Prospect, 49), PhD (Еng), leading researcher, specialist electron microscopy. E-mail: nick-aladyev@mail.ru.
Morozov Alexey — Baikov Institute of Metallurgy and Materials Science Russian Academy of Sciences (119334 Moscow, Leninsky Prospect, 49), PhD (Еng), senior researcher, specialist in the field of heat-resistant materials and intermetallic alloys. E-mail: amorozov@imet.ac.ru.
Pavlov Ivan — Institute of Crystallography named after A.V. Shubnikov RAS (119333 Moscow, Leninsky Prospect, 59), junior researcher, specialist in the field of electron microscopy. E-mail: ispav88@gmail.com.
Drozdov A.A., Povarova K.B., Bazyleva O.A., Antonova A.V., Bulakhtina M.A.,
Aladyev N.A., Morozov A.E., Pavlov I.S. Intermetallidnye splavy na osnove γ'Ni3Al. CHast' I. Osobennosti stroeniya, formirovaniya (γ'+γ) struktur i legirovaniya [Intermetallic alloys based on γ'Ni3Al. Part I. Features of the structure, formation of (γ'+γ) structures and alloying]. Perspektivnye Materialy [Advanced Materials] (in Russ), 2023, no. 9, pp. 5 – 25. DOI: 10.30791/1028-978X-2023-9-5-25
The use of the Bridgman method
to obtain thermoelectric silicon doped
with germanium and phosphorus
M. V. Dorokhin, Yu. M. Kuznetsov, P. B. Demina,
I. V. Erofeeva, A. V. Zdoroveyshchev, M. V. Ved’,
D. A. Zdoroveyshchev, A. Yu. Zavrazhnov, I. N. Nekrylov,
S. M. Peshcherova, R. V. Presnyakov, N. V. Sakharov
Heavily donor or acceptor doped metallurgical silicon is a promising candidate as a high-temperature thermoelectric energy converter due to the extremely low cost of its fabrication. The problem of silicon-based thermoelectric materials is the high value of the thermal conductivity; however, modern technologies offer several options for solving this problem at once. In the present work, silicon ingots heavily doped using Si:P compound were grown by the Bridgman directional crystallization method with a small (up to 5 at. %) germanium impurity fraction. The main thermoelectric parameters of the material were measured in a wide temperature range (50 – 800 °C). These are Seebeck coefficient, electrical conductivity and thermal conductivity. Based on the measurement results, the value of the thermoelectric figure of merit was calculated. The latter determines the value of the thermoelectric conversion efficiency. The study of electrical properties shows that phosphorus from the SiP compound is introduced into the lattice as a dopant and creates a high concentration of conduction electrons. The chemical analysis of the ingots showed the presence of additional background impurities, the concentration and composition of these impurities vary over the bulk of the sample. Despite the presence of impurities, the material demonstrates relatively high thermoelectric characteristics, and the efficiency is at the level of the best world results. A further potential for optimizing thermoelectric characteristics due to the possibility of a fine-grained polycrystalline structure formation is discussed.
Keywords: silicon, Bridgemen method, thermoelectric energy converters, doping.
DOI: 10.30791/1028-978X-2023-9-26-35
Dorokhin Mikhail — Research Institute of Physics and Technology of the Lobachevsky State University (603022 Nizhniy Novgorod, Gagarina Ave., 23, bd. 3), Dr Sci (Phys-Math), associate professor, leading researcher, specialist in the development of new functional semiconductor materials. E-mail: dorokhin@nifti.unn.ru.
Kuznetsov Yuriy — Research Institute of Physics and Technology of the Lobachevsky State University (603022 Nizhniy Novgorod, Gagarina Ave., 23, bd. 3), junior researcher, specialist in the field of research of thermoelectric properties of various materials. E-mail: y.m.kuznetsov@unn.ru.
Demina Polina — Research Institute of Physics and Technology of the Lobachevsky State University (603022 Nizhniy Novgorod, Gagarina Ave., 23, bd. 3), junior researcher, semiconductor spectroscopy specialist. E-mail: demina@phys.unn.ru.
Erofeeva Irina — Research Institute of Physics and Technology of the Lobachevsky State University (603022 Nizhniy Novgorod, Gagarina Ave., 23, bd. 3), PhD (Phys-Math), researcher, specialist in the field of synthesis of semiconductor thermoelectrics. E-mail: irfeya@mail.ru.
Zdoroveyshchev Anton — Research Institute of Physics and Technology of the Lobachevsky State University (603022 Nizhniy Novgorod, Gagarina Ave., 23, bd. 3), PhD (Phys-Math), senior researcher, specialist in the field of vacuum electron-beam evaporation. E-mail: zdorovei@nifti.unn.ru.
Ved’ Mikhail — Research Institute of Physics and Technology of the Lobachevsky State University (603022 Nizhniy Novgorod, Gagarina Ave., 23, bd. 3), PhD (Phys-Math), junior researcher, specialist in processing of semiconductor thermoelectrics. E-mail: ved@nifti.unn.ru.
Zdoroveyshchev Daniil — Research Institute of Physics and Technology of the Lobachevsky State University (603022 Nizhniy Novgorod, Gagarina Ave., 23, bd. 3), student, specialist in the field of research of electrophysical properties of materials. E-mail: daniel.zdorov@gmail.com.
Zavrazhnov Alexander — Voronezh State University (394018 Voronezh Universitetskaya pl. 1), PhD in Chemistry, associate professor, professor at the Inorganic chemistry chair, spesialist in solid solid state and inorganic chemistry. E-mail: alzavr08@rambler.ru.
Nekrylov Ivan — Voronezh State University (394018 Voronezh, Universitetskaya pl. 1), assistant of the department, spesialist in solid solid state and inorganic Chemistry. Е-mail: nekrylovchem@yandex.ru.
Peshcherova Svetlana — Vinogradov Institute of Geochemistry SB RAS, (664033 Irkutsk, 1А Favorsky str., Russia), PhD (Phys-Math), senior researcher, specialist in condensed matter physics, materials science. Е-mail: spescherova@mail.ru.
Presnyakov Roman — Vinogradov Institute of Geochemistry SB RAS, (664033 Irkutsk, 1А Favorsky str., Russia), PhD (Phys-Math), researcher, specialist in condensed matter physics, crystal growth. Е-mail: ropr@igc.irk.ru.
Sakharov Nikita — Research Institute of Physics and Technology of the Lobachevsky State University (603022 Nizhniy Novgorod, Gagarina Ave., 23, bd 3), PhD (Phys-Math), junior researcher, specialist in electron microscopy. Е-mail: nvsaharov@nifti.unn.ru.
Dorokhin M.V., Kuznetsov Yu.M., Demina P.B., Erofeeva I.V., Zdoroveyshchev A.V., Ved’M.V., Zdoroveyshchev D.A., Zavrazhnov A.Yu., Nekrylov I.N., Peshcherova S.M., Presnyakov R.V., Sakharov N.V. Primenenie metoda Bridzhmena dlya polucheniya termoelektricheskogo kremniya, legirovannogo germaniem i fosforom [The use of the Bridgman method to obtain thermoelectric silicon doped with germanium and phosphorus]. Perspektivnye Materialy [Advanced Materials] (in Russ), 2023, no. 9, pp. 26 – 35. DOI: 10.30791/1028-978X-2023-9-26-35
Effect of irradiation with 132Xe27+ ions
at different angles
on the critical parameters of second generation
HTSC tapes basedon GdBa2Cu3O7–x
L. Kh. Antonova, V. K. Semina, A.V. Troitskii
The effect of irradiation with 132Xe27+ ions (167 MeV) at angles of 20°, 30°, 60°, and 90° to the tape surface on the critical parameters of second-generation superconducting tapes based on the SuperOx GdBa2Cu3O7–xcompound has been studied. The dependences of the critical current (Ic) at T = 77 K in the intrinsic magnetic field and the critical temperature (Tc) on the ion irradiation fluences at different irradiation angles are obtained. At all studied irradiation angles, a small (up to ~ 5 %) increase in the critical current of HTSC tapes is observed in the fluence range from 3.4·108 to 5·109 ion/cm2. The radiation resistance of a superconductor to ion irradiation is determined as a function of the irradiation angle. To determine the radiation resistance of the tape, the threshold irradiation fluence Fth was measured, at which the critical current tends to zero. The dependence of Fth on the irradiation angle a is well approximated by the formula: Fth = F0 + A·exp(– a/t).
Keywords: second generation superconducting tapes, xenon ions, critical current, critical temperature, radiation resistance.
DOI: 10.30791/1028-978X-2023-9-36-42
Antonova Landysh — All-Russian Institute for Scientific and Technical Information (123190 Moscow, Usievicha str. 20); Moscow Polytechnic University (107023, Moscow, Bolshaya Semyonovskaya street, 38), associated professor of the department of Mathematics, scientifical area of studies are in the field of semiconductor structures, high-temperature superconductivity, radiation defects in solid. E-mail: lpaa117@gmail.com.
Semina Vera — Joint Institute for Nuclear Research, (Dubna, 141980, str. Joliott-Curie, 6) PhD, researcher, specialist in the field of radiation materials science. E-mail: semina@jinr.ru.
Troitskii Alexey — Prokhorov General Physics Institute of the Russian Academy of Sciences (Moscow 119991, Vavilov Str. 38), PhD, senior researcher, specialist in the field of low temperature physics, superconductivity, radiation defects. E-mail: at@kapella.gpi.ru.
Antonova L.Kh., Semina V.K., Troitskii A.V. Vliyanie oblucheniya ionami 132Xe27+ pod razlichnymi uglami na kriticheskie parametry VTSP lent vtorogo pokoleniya na osnove GdBa2Cu3O7 – x [Effect of irradiation with 132Xe27+ ions at different angles on the critical parameters of second generation HTSC tapes based on GdBa2Cu3O7–x]. Perspektivnye Materialy [Advanced Materials] (in Russ), 2023, no. 9, pp. 36 – 42. DOI: 10.30791/1028-978X-2023-9-36-42
Cryochemical synthesis of tricalcium phosphate powders
and mixed sodium-containing silicophosphates
and phosphatohermanates for bioceramics formation
by stereolithographic 3D-printing
D. S. Larionov, V. A. Bitanova, P. V. Evdokimov,
A. V. Garshev, O. A. Shlyakhtin, V. I. Putlyaev
Synthesis of chemically homogeneous fine powders based on glaserite-like phases in the CaO – Na2O – P2O5 – SiO2 (GeO2) systems by the cryochemical method, including rapid freezing of the total salt solution, sublimation ice removal, and subsequent thermolysis of the dehydrated salt precursor, is considered. The complex chemical composition of the powders is required to create bioceramics with improved osteoplastic characteristics. The paper presents the results of the synthesis of powders with submicron granulometry from solutions with different anionic composition; the behavior of such powders in the sintering process is described.
Keywords:tricalcium phosphate, mixed calcium-sodium phosphates, silicophosphates, phosphatohermanates, cryochemical synthesis, sintering, bioceramics, 3D printing.
DOI: 10.30791/1028-978X-2023-9-43-53
Larionov Dmitry — M.V. Lomonosov Moscow State University (119991, Moscow, Leninskie Gory 1, p. 3), junior researcher, specialist in biomaterials, calcium phosphate production. E-mail: dmiselar@gmail.com.
Bitanova Victoria — M.V. Lomonosov Moscow State University (119991, Moscow, Leninskie Gory 1, p. 3), student, specialist in sol-gel synthesis and organosynthesis. E-mail:
viktory-2002@inbox.ru.
Evdokimov Pavel — Institute of General and Inorganic Chemistry, Russian Academy of Sciences (Moscow, 119334, Leninsky Prospekt 31); Lomonosov Moscow State University (Moscow, 119991, Leninskie Gory 1, p. 3),PhD chemical sciences, researcher, specialist in the field of bioceramics, sintering of calcium phosphates. E-mail: pavel.evdokimov@gmail.com.
Garshev Alexey — M.V. Lomonosov Moscow State University (119991, Moscow, Leninskie Gory 1, p. 3), PhD Chemical Sciences, asociate professor, specialist in materials science, electronic microscopy and X-ray diffraction, ceramics sintering. E-mail:
alexey.garshev@gmail.com.
Shlyakhtin Oleg — M.V. Lomonosov Moscow State University (119991, Moscow, Leninskie Gory 1, p. 3), Dr Sci (Chem), professor, specialist in materials science, cryochemical synthesis. E-mail: oleg@inorg.chem.msu.ru.
Putlyaev Valery — M.V. Lomonosov Moscow State University (119991, Moscow, Leninskie Gory 1, p. 3), PhD Chemical Sciences, associate professor, specialist in materials science. E-mail: valery.putlayev@gmail.com.
Larionov D.S., Bitanova V.A., Evdokimov P.V., Garshev A.V., Shlyakhtin O.A., Putlyaev V.I. Kriohimicheskij sintez poroshkov trikal'cijfosfata i smeshannyh natrijsoderzhashchih silikofosfatov i fosfatogermanatov dlya formirovaniya biokeramiki metodom stereolitograficheskoj 3D-pechati [Cryochemical synthesis of tricalcium phosphate powders and mixed sodium-containing silicophosphates and phosphatohermanates for bioceramics formation by stereolithographic 3D-printing]. Perspektivnye Materialy [Advanced Materials] (in Russ), 2023, no. 9, pp. 43 – 53. DOI: 10.30791/1028-978X-2023-9-43-53
The effect of heat treatment
and tungsten content on the structure,
phase composition and corrosion
resistance of high-entropy alloys
of the Fe – Cr – Ni – Mo – W system
A. Yu. Ivannikov, M. A. Kudashev, Yu. A. Puchkov,
S. D. Karpukhin, R. M. Nazarkin,
S. V. Kanushkin, M. A. Kaplan, V. A. Zelensky
The effect of heat treatment (diffusion annealing, quenching, low-temperature and high-temperature tempering) on the structure, phase composition and corrosion resistance of high-entropy 35 Fe – 30 Cr – 20 Ni – 10 Mo – 5 W and 30 Fe – 30 Cr – 20 Ni – 10 Mo – 10 W alloys has been studied. High-entropy alloys of the Fe – Cr – Ni – Mo – W system with different concentrations of tungsten were obtained by sintering mechanically alloyed powders in a vacuum furnace. It was revealed that the total and pitting resistance of the obtained high-entropy alloys to aqueous solutions of NaCl is higher than that of industrially produced austenitic corrosion-resistant steel 316 L used in the oil and gas industry.
Keywords:powder metallurgy, high-entropy alloys, pitting, corrosion resistance.
DOI: 10.30791/1028-978X-2023-9-54-62
Ivannikov Alexander — Baikov Institute of Metallurgy and Materials Science of the Russian Academy of Sciences (Moscow, 119334, Leninsky Prospekt, 49), PhD in Technical Sciences, senior researcher, specialist in the field of powder metallurgy and processing of materials with concentrated energy flows. E-mail: aivannikov@imet.ac.ru.
Kudashev Miroslav — Bauman Moscow State Technical University (Moscow, 105005, 2nd Bauman str., 5, p. 1), bachelor, student, specialist in corrosion testing. E-mail: mkydashev@bmstu.ru.
Puchkov Yuri — Bauman Moscow State Technical University (Moscow, 105005, 2nd Bauman str., 5, p. 1), PhD in, associate professor, specialist in the field of physical chemistry of corrosion of materials. E-mail: yuputchkov@bmstu.ru.
Karpukhin Sergey — Bauman Moscow State Technical University (Moscow, 105005, 2nd Bauman str., 5, p. 1), PhD in Technical Sciences, associate professor, specialist in electron microscopy. E-mail: skarpyxin@bmstu.ru.
Nazarkin Roman — Bauman Moscow State Technical University (Moscow, 105005, 2nd Bauman str., 5, p. 1), senior lecturer, specialist in the field of X-ray diffraction studies. E-mail:nazarkin@bmstu.ru.
Konushkin Sergey — Baikov Institute of Metallurgy and Materials Science of the Russian Academy of Sciences (Moscow, 119334, Leninsky Prospekt, 49), PhD in Technical Sciences, researcher, specialist in the field of titanium alloys and heat treatment of materials. E-mail: skonushkin@imet.ac.ru.
Kaplan Mikhail — Baikov Institute of Metallurgy and Materials Science of the Russian Academy of Sciences (Moscow, 119334, Leninsky Prospekt, 49), PhD in Technical Sciences, researcher, specialist in the field of antibacterial, corrosion-resistant steels and alloys. E-mail: mkaplan@imet.ac.ru;
Zelensky Viktor — Baikov Institute of Metallurgy and Materials Science of the Russian Academy of Sciences (Moscow, 119334, Leninsky Prospekt, 49), PhD in Technical Sciences, leading researcher, specialist in the field of powder metallurgy and special alloys. E-mail: vzelensky@imet.ac.ru.
Ivannikov A.Yu., Kudashev M.A., Puchkov Yu.A., Karpukhin S.D., Nazarkin R.M., Kanushkin S.V., Kaplan M.A., Zelensky V.A. Vliyanie termicheskoj obrabotki i soderzhaniya vol'frama na strukturu, fazovyj sostav i korrozionnuyu stojkost' vysokoentropijnyh splavov sistemy Fe – Cr – Ni – Mo – W [The effect of heat treatment and tungsten content on the structure, phase composition and corrosion resistance of high-entropy alloys of the Fe – Cr – Ni – Mo – W system]. Perspektivnye Materialy [Advanced Materials] (in Russ), 2023, no. 9, pp. 54 – 62. DOI: 10.30791/1028-978X-2023-9-54-62
Preparation and physico-chemical
properties of coatings based
on graphene-like materials
D. V. Belov, S. N. Belyaev, D. B. Radishchev, A. I. Okhapkin
Dispersions of graphene oxide and its reduced form have been obtained. The resulting dispersions were characterized by UV spectroscopy. The features of the graphene oxide reduction process in the composition of coatings deposited on solid substrates (aluminum, optical glass, KDP single crystal) by interaction with various reducing agents: hydrazine hydrate, formalin, ascorbic and citric acids, and ammonium citrate are studied. Surface structures were studied by Raman spectroscopy. The surface morphology of coatings and the defectiveness of graphene-like materials obtained by the reduction of graphene oxide dispersions on the surface of substrates have been studied.
Keywords: graphene oxide, graphene, dispersions, coatings, nanostructures, graphene sheets, graphene-like materials, graphene oxide reduction, Hummers method, Raman spectroscopy, UV spectroscopy.
DOI: 10.30791/1028-978X-2023-9-63-82
Belov Denis — Federal Research Center A.V. Gaponov-Grekhov Institute of Applied Physics of Russian Academy of Sciences (IAP RAS) (Nizhny Novgorod 603950, Ul’yanov St., 46), PhD (Chem), specialist in the field of chemistry of nanostructured materials and processes on the surface of solids. E-mail: belov.denbel2013@yandex.ru.
Belyaev Sergey — Federal Research Center A.V. Gaponov-Grekhov Institute of Applied Physics of Russian Academy of Sciences (IAP RAS) (Nizhny Novgorod 603950, Ul’yanov St., 46), PhD (Chem), scientific researcher, specialist in the field of physical chemistry of surfaces, modeling of chemical reactions on surfaces of solids, application of nanocoatings. E-mail: serg_belyaev@bk.ru.
Radishchev Dmitry — Federal Research Center A.V. Gaponov-Grekhov Institute of Applied Physics of Russian Academy of Sciences (IAP RAS) (Nizhny Novgorod 603950, Ul’yanov St., 46), PhD (Phys-Math), senior researcher, specialist in the field of physics of plasma technologies. E-mail: dibr@ipfran.ru.
Okhapkin Andrey — Institute of Physics of Microstructures of the RAS (603950 Nizhny Novgorod, GSP-105, Nizhny Novgorod Region, Kstovsky District, Afonino, Akademicheskaya st., 7), PhD (Chem), researcher at department of Technology of nanostructures and devices, specialist in the field of plasma-chemical etching of materials (semiconductors, conductors and dielectrics) and thin film deposition. E-mail: poa89@ipmras.ru.
Belov D.V., Belyaev S.N., Radishchev D.B., Okhapkin A.I. Poluchenie i issledovanie fiziko-himicheskih svojstv pokrytij na osnove grafenopodobnyh materialov [Preparation and physico-chemical properties of coatings based on graphene-like materials]. Perspektivnye Materialy [Advanced Materials] (in Russ), 2023, no. 9, pp. 63 – 82. DOI: 10.30791/1028-978X-2023-9-63-82
Maximum gas pressure in the pores
M. I. Alymov, A. B. Ankudinov, S. I. Averin,
V. A. Zelensky, F. F. Galiev
In this paper, an analytical expression is obtained to estimate the maximum value of the gas pressure inside a closed pore. It was based on G. Lyame’s solution of the problem of the stress-strain state of a material near a spherical pore in an infinite medium. As an example, the pores at the sintering temperature of nickel and iron metal powders are considered. It is also assumed that gases in the pores do not dissolve in the matrix of the base material. The formula for calculating the maximum value of the pressure inside the pore takes into account the theory of the greatest specific potential energy of shaping and Laplace pressure, which also contributes to the stress-strain state of the material. The isothermal case without external pressure is considered. In this paper, the dependence of the maximum pressure in the pore on the pore radius is constructed. The calculation uses the parameters of materials at temperatures close to their sintering temperatures. It is shown that the maximum possible gas pressure inside the closed pores depends on the pore size. With a decrease in the pore size, the maximum possible gas pressure inside a closed pore can reach high values up to several thousand atmospheres.
Keywords:pore pressure, critical pore pressure, powders, iron, nickel, elasticity theory, powder metallurgy, porosity, closed pores.
DOI: 10.30791/1028-978X-2023-9-83-88
Alymov Mikhail — Merzhanov institute of structural macrokinetics and materials science of RAS (Academician Osipyan str., 8, 142432, Chernogolovka), Doctor of Engineering, corresponding member of the RAS, director of ISMAN, specialist in the field of powder metallurgy, materials science and nanopowder materials.
Ankudinov Alexey — Baikov institute of Metallurgy and Materials Science of the RAS (119334, Moscow Leninsky ave. 49), senior researcher, specialist in the field of materials science and powder metallurgy.
Averin Sergei — Baikov Institute of Metallurgy and Materials Science of the RAS (119334, Moscow Leninsky ave. 49), researcher, specialist in the field of powder metallurgy and physical materials science.
Zelensky Victor — Baikov institute of Metallurgy and Materials Science of the RAS (119334, Moscow Leninsky ave. 49), candidate of physical and mathematical sciences, leading researcher, specialist in the field of powder metallurgy and porous materials synthesis.
Galiev Fanis — Merzhanov institute of structural macrokinetics and materials science of RAS (Academician Osipyan str., 8, Chernogolovka), junior researcher, specialist in the field of materials science and plastic deformation of reactive mixtures.
Alymov M.I., Ankudinov A.B., Averin S.I., Zelensky V.A., Galiev F.F. Maksimal'noe davlenie gaza v porah [Maximum gas pressure in the pores]. Perspektivnye Materialy [Advanced Materials] (in Russ), 2023, no. 9, pp. 83 – 88. DOI: 10.30791/1028-978X-2023-9-83-88
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