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dx.doi.org/ 10.18577/2307-6046-2023-0-1-3-14

УДК 669.725

Sevalnev G.S., Nefedkin D.Yu., Druzhinina M.E., Mosolov A.N., Samoilova I.I., Maksimov A.V.

KINETICS OF DIFFUSION SATURATION OF BERYLLIUM-CONTAINING STEEL VNS32-VI AT VARIOUS TYPES OF THERMOCHEMICAL TREATMENT

Microstructure, microhardness and kinetics of diffusion saturation of beryllium-containing steel VNS32-VI after various types of thermochemical treatment were studied. It was found that the microstructure of the diffusion layer consists of martensite, δ-ferrite and carbides of various sizes and morphology. The study of diffusion saturation kinetics showed that increasing the saturation time during vacuum cementation leads to an increase in the thickness of the diffusion layer only with the use of preliminary vacuum nitriding.

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Reference list

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dx.doi.org/ 10.18577/2307-6046-2023-0-1-15-27

УДК 621.791.724

Sukhov D.I., Kaplansky Yu.Yu., Rogalev A.M., Kurkin S. E.

THE FEATURES OF PROCESSING Cr-RICH NICKEL BASED ALLOY BY SELECTIVE LASER MELTING

In this paper the structure and mechanical properties of SLM-built EP648 alloy are investigated. The research results of alloy via SEM, HR-TEM allowed detecting CrN particles and Me₂₃C₆ carbides in γ-matrix. The complex analysis of hot cracking in EP648 alloy was done. The effect of scan strategy type and oxygen content on hot crack volume density was shown. The connection between scan strategy type and tensile properties at room temperature was researched.

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Reference list

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dx.doi.org/ 10.18577/2307-6046-2023-0-1-28-38

УДК 621.762:669.3

Peskova A.V., Bakradze M.M., Tikhonov М.М., Kuko I.S.

INVESTIGATION OF THE INFLUENCE OF THE OXIDE LAYER ON THE SURFACE OF PARTICLES METAL-POWDER COMPOSITIONS OF COPPER-CHROMIUM ALLOYS ON THEIR TECHNOLOGICAL PROPERTIES

Researches were carried out metal-powder compositions of the copper-chromium alloy system Cu–(0,5–1,0 %)Cr, obtained by the method of gas atomization. The influence of the formed oxide layer on the surface of particles on the technological properties of the powder has been researched. After the selective laser fusion, a change in the color of the powder from copper to violet was detected, as well as a formation of conglomerates, which led to a decrease in properties. Researches were carried out of fluidity, bulk density, as well as an assessment of the particle morphology were carried out metal-powder compositions before and after selective
laser fusion.

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dx.doi.org/ 10.18577/2307-6046-2023-0-1-39-49

УДК 620.1

Lukinа E.A., Naprienko S.A., Gorbovets M.A., Zaysev D.V., Oglodkova Yu.S.

CHANGES IN THE STRUCTURAL AND PHASE STATE OF COLD-FORMED SEMI-FINISHED PRODUCTS FROM Al–Li-ALLOYS AFTER VARIOUS LOW-TEMPERATURE EFFECTS

The structure and phase composition of pressed semi-finished products from two batches of alloy 1420 in states after natural and artificial aging have been studied by x-ray diffraction analysis, optical and electron microscopy. The mechanical properties, dimensions and character of the separation of the hardening phases are determined, the values of the lattice periods of the matrix and the phase of the pressed profiles of alloy 1420 are analyzed. A comparative structural analysis was carried out with cold-rolled semi-finished products of alloy 1424 – after aging, as well as additional, long-term low-temperature heating.

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17. Bulina N.V., Malikov A.G., Orishich А.М., Klochkov G.G. Research of the structural-phase composition of laser weld joint depending on the thermal processing of the aluminum alloy V-1469. Aviacionnye materialy i tehnologii, 2019, no. 2 (55), pp. 31–39. DOI: 10.18577/2071-9140-2019-0-2-31-39.

dx.doi.org/ 10.18577/2307-6046-2023-0-1-50-68

УДК 538.9:624.1

Nerush S.V., Kaplansky Yu.Yu., Dynin N.V., Benarieb I., Savichev I.D.

DEVELOPMENT OF LASER POWDER BED FUSION PARAMETERS, STRUCTURE AND MECHANICAL PROPERTIES OF A HIGH-STRENGTH ALUMINUM ALLOY Al–Ce–Cu

Presents the results of studies of the structure and mechanical properties of a heat-resistant aluminum alloy Al–Ce–Cu produced by laser powder bed fusion (L-PBF). The influence of the synthesis parameters on the single track’s formation, the structure of melt pool, and the properties of Al–Ce–Cu alloy has been studied. The analysis of the mechanical properties of the synthesized material was carried out in comparison with the cast material under normal conditions and elevated temperatures. The developed modes of synthesis provided a twofold increase in the yield strength and an eightfold increase in the plastic strain degree of the Al–Ce–Cu alloy in comparison with the cast one, which significantly expands the scope of its application for aircraft critical parts. A comparative analysis of the mechanical properties of the cast and synthesized material under normal conditions and elevated temperatures is given. Using scanning electron microscopy, a high-resolution transmission electron microscopy (HRTEM) and thermodynamic modeling of the phase composition, the structural-phase state of the material in the cast and synthesized states was studied.

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Reference list

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11. Dynin N.V., Zavodov A.V., Oglodkov M.S., Khasikov D.V. The influence of process parameters of selective laser melting on the structure of aluminum alloy Al–Si–Mg system. Trudy VIAM, 2017, no. 10 (58), paper no. 01. Available at: http://www.viam-works.ru (accessed: January 20, 2022). DOI: 10.18577/2307-6046-2017-0-10-1-1.
12. Fomina M.A., Dynin N.V., Shurtakov S.V., Morozova S.E. Corrosion behavior of Al–Si–Mg alloy made by selective laser melting method. Trudy VIAM, 2018, no. 4 (64), paper no. 11. Available at: http://www.viam-works.ru (accessed: January 20, 2022). DOI: 10.18577/2307-6046-2018-0-4-91-100.
13. Knyazev A.E., Vostrikov A.V. Sieving of powders additive and powder manufacturings (review). Trudy VIAM, 2020, no. 11 (93), paper no. 02. Available at: http://www.viam-works.ru (accessed: January 20, 2022). DOI: 10.18577/2307-6046-2020-0-11-11-20.
14. Lukina E.A., Zaitsev D.V., Sbitneva S.V., Zavodov A.V. Selective laser synthesis of heat-resistant nickel alloy: structural aspects. Fotonika, 2017, no. 4, pp. 36–46.
15. Evgenov A.G., Petrushin N.V., Shurtakov S.V., Zaitsev D.V. On the issue of developing a physical model of track crystallization in the process of selective laser melting of heat-resistant alloys. The role of fundamental research in the implementation of the "Strategic directions for the development of materials and technologies for their processing for the period up to 2030": materials of VII All-Russian. conf. Moscow: VIAM, 2021, pp. 149–161.

dx.doi.org/ 10.18577/2307-6046-2023-0-1-69-83

УДК 669.715

Sbitneva S.V., Lukinа E.A., Benarieb I.

SOME STRUCTURAL FEATURES OF ALUMINUM ALLOYS OBTAINED BY SELECTIVE LASER MELTING (review)

Selective laser alloying (SLM) of metal powders is one of the most common methods of additive manufacturing of products. The most studied aluminum alloys for SLS technology are AlSi12 and AlSi10Mg alloys. In the paper, using the example of these alloys, some structural features of synthesized aluminum alloys are described, as well as typical defects that can form during synthesis depending on various factors. Scientific and technical literature data on the structure and mechanical properties of aluminum alloys of other alloying systems (Al–Cu–Mg, Al–Mg–Sc, Al–Zn–Mg–Cu) are presented.

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Reference list

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2. Kablov E.N., Evgenov A.G., Petrushin N.V., Bazyleva O.A., Mazalov I.S., Dynin N.V. New generation materials and digital additive technologies for the production of resource parts FSUE "VIAM". Part 3. Adaptation and creation of materials. Electrometallurgiya, 2022, no. 4, pp. 15–25.
3. Knyazev A.E., Vostrikov A.V. Sieving of powders additive and powder manufacturings (review). Trudy VIAM, 2020, no. 11 (93), paper no. 02. Available at: http://www.viam-works.ru (accessed: October 20, 2022). DOI: 10.18577/2307-6046-2020-0-11-11-20.
4. Tang H.P., Qian M., Liu N. et al. Effect of powder reuse times on additive manufacturing of Ti–6Al–4V by selective electron beam melting. Journal of the Minerals, 2015, vol. 67, pp. 555–563.
5. Kablov E.N. Materials of a new generation and digital technologies for their processing. Vestnik Rossiyskoy akademii nauk, 2020, vol. 90, no. 4, pp. 331–334.
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11. Hönnige J.R., Colegrove P.A., Ganguly S. et al. Control of Residual Stress and Distortion in Aluminium Wire + Arc Additive Manufacture with Rolling. Additive Manufacturing, 2018, vol. 22, pp. 775–783.
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13. Fomina M.A., Dynin N.V., Shurtakov S.V., Morozova S.E. Corrosion behavior of Al–Si–Mg alloy made by selective laser melting method. Trudy VIAM, 2018, no. 4 (64), paper no. 11. Available at: http://www.viam-works.ru (accessed: October 03, 2022). DOI: 10.18577/2307-6046-2018-0-4-91-100.
14. Dynin N.V., Zavodov A.V., Oglodkov M.S., Khasikov D.V. The influence of process parameters of selective laser melting on the structure of aluminum alloy Al–Si–Mg system. Trudy VIAM, 2017, no. 10 (58), paper no. 01. Available at: http://www.viam-works.ru (accessed: October 03, 2022). DOI: 10.18577/2307-6046-2017-0-10-1-1.
15. Movenko D.A., Shurtakov S.V. Microcrack formation and controlling in nickel superalloys processed by selective laser melting (review). Aviation materials and technologies, 2022, no. 2 (67), paper no. 04. Available at: http://www.journal.viam.ru (accessed: October 20, 2022). DOI: 10.18577/2713-0193-2022-0-2-43-51.
16. Siddique S., Imran M., Walther F. Very high cycle fatigue and fatigues crack propagation behavior of selective laser melted AlSi12 alloy. International Journal of Fatigue, 2017, vol. 94, pp. 246–254.
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22. Wang P., Eckert J., Prsahanth K.G. et al. A review of particles-reinforced aluminum matrix composites fabricated by selective laser melting. Transactions of Nonferrous Metals Society of China, 2020, vol. 30, pp. 2001–2034.
23. Vilaro T., Kottman-Rexerodt V., Thomas M. et al. Direct fabricated of a Ti–47Al–2Cr–2Nb alloy by selective laser melting and direct metal deposition processes. Advanced Materials Research, 2010, vol. 89, pp. 586–591.
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28. Casati R., Lemke J.N., Alarcon A.Z., Vedani M. Aging behavior of high-strength Al Alloy 2618 produced by selective laser melting. Metallurgical and Materials Transactions A, 2017. Vol. 48 (2), pp. 575–579.
29. Kotadia H.R., Gibbons G., Das A., Howes P.D. A review of laser powder bed fusion additive manufacturing of aluminium alloys: Microstructure and properties. Additive Manufacturing, 2021, vol. 46, pp. 1–23.
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dx.doi.org/ 10.18577/2307-6046-2023-0-1-84-96

УДК 669.018.95

Lutsenko A.N., Efimochkin I.Yu., Moiseeva N.S.

STUDY MECHANISM FORMATION A SURFACE LAYER METAL COMPOSITE MATERIAL BASED ON Mo–Si–B SYSTEM AFTER HIGH-TEMPERATURE INFLUENCE AT DIFFERENT ANGLES OF ATTACK

The paper analyzes the changes phase composition of the surface layer metal composite material base on Mo–Si–B system, reinforced with dispersed particles Al₂O₃ oxide. The main stages formation phase composition surface layer with a thickness of 0–250 microns at an exposure temperature of 1300–2100 °C have been established by x-ray phase analysis. It is established that protective amorphous phase is formed at temperature of 1700 °C. At a heating temperature of 1900 °C and above, the glassy layer ablates, which leads to oxidation of the near-surface layers of the base material.

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Reference list

1. Grashchenkov D.V., Efimochkin I.Yu., Bolshakova A.N. High-temperature metal-matrix composite materials reinforced with particles and fibers of refractory compounds. Aviacionnye materialy i tehnologii, 2017, no. S, pp. 318–328. DOI: 10.18577/2071-9140-2017-0-S-318-328.
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3. Karashaev M.M., Bazyleva O.A., Shestakov A.V., Ovsepyan S.V. Technological principles for the development of metal composite materials reinforced with oxide and intermetallic particles. Aviacionnye materialy i tehnologii, 2020, no. 3 (60), pp. 29–36. DOI:10.18577/2071-9140-2020-0-3-29-36.
4. Majumdar S., Schliephake D., Gorr B. et al. Effect of Yttrium Alloying on Intermediate to High-Temperature Oxidation Behavior of Mo–Si–B Alloys. Metallurgical and Materials Transactions A, 2013, vol. 44, no. 5, pp. 2243–2257.
5. Perepezko J.H., Sakidja R. Environmental Resistance of Mo–Si–B Alloys and Coatings. Oxidation of Metals, 2013, vol. 80, no. 3, pp. 207–218. DOI: 10.1007/S11085-013-9373-3.
6. Kablov E.N., Zhestkov B.E., Grashchenkov D.V., Sorokin O.Yu., Lebedeva Yu.E., Vaganova M.L. Investigation of the Oxidative Resistance of High-Temperature Coating Based on a SiC Material under Exposure to High-Enthalpy Flow. High Temperature, 2017, vol. 55, no. 6, pp. 873–879.
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8. Kablov E.N. Materials of a new generation and digital technologies for their processing. Vestnik Rossiyskoy akademii nauk, 2020, vol. 90, no. 4, pp. 331–334.
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10. Hönigschmid O. Über das Molydänsilicid MoSi2, das Wolframsilicid WSi2 und das Tantalsilicid TaSi2. Monatshefte für Chemie und verwandte Teile anderer Wissenschaften, 1997, vol. 28, pp. 1017–1028.
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14. Titov D.D., Kargin Yu.F., Lysenkov A.S. et al. Effect of WSi2 content and additives of magnesium aluminosilicates on the oxidation and strength properties of MoSi2–WSi2 composites. Materialovedenie, 2012, no. 7, pp. 45–49.
15. Batiyenkov R.V., Bolshakova A.N., Efimochkin I.Yu. The problem of low-temperature plasticity of molybdenum and alloys based on it (review). Trudy VIAM, 2018, no. 3 (63), paper no. 02. Available at: http://www.viam-works.ru (accessed: June 28, 2022). DOI: 10.18577/2307-6046-2018-0-3-12-17.
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18. Lutsenko A.N., Efimochkin I.Yu., Moiseeva N.S. Study mechanism of creation structure on composite material based on molybdenum after high-temperature influence. Trudy VIAM, 2022, no. 4 (110). paper no. 04. Available at: http://www.viam-works.ru (accessed: May 16, 2022). DOI: 10.18577/2307-6046-2022-0-4-32-41.
19. Babashov V.G., Maksimov V.G., Varrik N.M., Samorodova O.N. Studying of structure and pro-perties of samples of ceramic composite materials on the basis of mullite. Aviacionnye materialy i tehnologii, 2020, no. 1 (58), pp. 54–63. DOI: 10.8577/2071-9140-2020-0-1-54-63.
20. Schneider H., Schreuer J., Hildmann B. Structure and properties of mullite – A review. Journal of the European Ceramic Society, 2008, no. 28, pp. 329–344.

dx.doi.org/ 10.18577/2307-6046-2023-0-1-97-106

УДК 669.018.95

Zhitnyuk S.V., Medvedev P.N.

INVESTIGATION OF MICROSTRUCTURE AND PHASE COMPOSITION OF THE METALLIC COMPOSITE MATERIAL Al–Si–Mg SYSTEM MODIFIED BY SILICON CARBIDE PARTICLES BY MECHANICAL ALLOYING. Part 1

The development of composite materials based on aluminum alloys modified with ceramic fillers is one of the most important areas of materials science today. The most promising method for obtaining composite materials based on aluminum is the method of selective laser melting. The purpose of this work is to identify the features of the formation of the microstructure and phase composition of the composite powder in the process of mechanical alloying of aluminum alloy VAS1 and silicon carbide depending on time.

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dx.doi.org/ 10.18577/2307-6046-2023-0-1-107-118

УДК 669.018.95

Zhitnyuk S.V., Medvedev P.N.

INVESTIGATION OF MICROSTRUCTURE AND PHASE COMPOSITION OF THE METALLIC COMPOSITE MATERIAL Al–Si–Mg SYSTEM MODIFIED BY SILICON CARBIDE PARTICLES BY MECHANICAL ALLOYING. Part 2

The process of mechanical alloying of aluminum alloy BAC1 with silicon carbide particles in a ball mill has been studied. An analysis of the stages of the process of mechanical alloying in the preparation of BAC1–SiC powder compositions was carried out and characteristic microstructures corresponding to each stage were identified. A hypothesis was formulated about the effect of collisions of granule particles on the formation of the structure of composite particles during mechanical alloying of an aluminum alloy BAC1 with silicon carbide SiC, which satisfactorily describes the experimental results obtained.

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10.

dx.doi.org/ 10.18577/2307-6046-2023-0-1-119-127

УДК 666.762.14

Maximov V.G., Babashov V.G., Varrik N.M., Lyulyukina G.Yu.

STUDY OF THE HABITUS OF MULLITE CRYSTALS IN COMPOSITE CERAMICS «MULLITE–ZIRCONIUM DIOXIDE»

Presents the results of studying the microstructure features of the ceramic composite material «mullite–zirconium dioxide». It is confirmed that the crystals of mullite, as in traditional mullite ceramics, have the habit of a long four-sided prism. Zirconium dioxide crystals provide hardening of the material by the mechanism of turning the crack to the interface, which, in combination with the specific habitus of the crystals of the main phase, leads to the formation of a characteristic highly developed fracture surface and improves the resistance of the material to cracking.

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Reference list

1. Kablov E.N., Evgenov A.G., Petrushin N.V., Bazyleva O.A., Mazalov I.S., Dynin N.V. New generation materials and digital additive technologies for the production of resource parts FSUE "VIAM". Part 3. Adaptation and creation of materials. Elektrometallurgiya, 2022, no. 4, pp. 15–25.
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3. Popov R.Yu., Dyatlova E.M., Sergievich O.A., Pogrebenkov V.M. Influence of modifying refractory and high-strength additives on the physical and technical characteristics of mullite-cordierite ceramics. Trudy Kolskogo nauchnogo tsentra RAN, 2018, no. 2-2, pp. 889–894. DOI: 10.25702/KSC.2307-5252.2018.9.1.889-894.
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5. Lebedeva Yu.E., Shchegoleva N.E., Voronov V.A., Solntcev S.S. Al2O3 and ZrO2 ceramic materials obtained by sol-gel method. Trudy VIAM, 2021, no. 4 (98), paper no. 05. Available at: http://www.viam-works.ru (accessed: July 1, 2022). DOI: 10.18577/2307-6046-2021-0-4-61-73.
6. Lebedeva Yu.E., Shchegoleva N.E., Voronov V.A., Kovaleva V.S., Chainikova A.S. Effect of modifying zirconium oxide additive on the properties of ceramic materials of the Y2O3–Al2O3–SiO2 system obtained by the sol-gel method. Trudy VIAM, 2021, no. 10 (104), paper no. 07. Available at: http://www.viam-works.ru (accessed: July 07, 2022). DOI: 10.18577/2307-6046-2021-0-10-67-78.
7. Shchegoleva N.E., Chainikova A.S., Orlova L.A. Sintering process analysis in the manufacture of strontiumalumi-nosilicate glass ceramics by power-pressed method. Aviacionnye materialy i tehnologii, 2018, no. 4 (53), pp. 55–62. DOI: 10.18577/2071-9140-2018-0-4-55-62.
8. Lavrov A.V., Yakovlev N.O., Erasov V.S. Destruction of ceramic materials under the influence of high-speed indenter. Aviacionnye materialy i tehnologii, 2018, no. 2 (51), pp. 88–94. DOI: 10.18577/2071-9140-2018-0-2-88-94.
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12. Orgaz F. Densification and crystalization kinetics of mullite diphasic gels from non-isothermal dilatometry experiments. Boletin de la Sociedad Espanola de Ceramica y Vidrio, 2008, vol. 47, no. 6, pp. 358–365.
13. Chen Yi, Lu Z., Wan W. et al. Effect of Urchin-Like Mullite Whiskers on the High-Temperature Performance of Porous SiO2-Based Ceramic Molds. Materials, 2019, no. 12, art. 1181. DOI: 10.3390/ma12071181.
14. Barrientos-Hernґandez F.R., Pґerez-Labra M., Lobo-Guerrero A. et al. Effect of Particle Size and Sintering Temperature on the Formation of Mullite from Kyanite and Aluminum Mixtures. Advances in Materials Science and Engineering, 2021, vol. 2021, art. 6678297. DOI: 10.1155/2021/6678297.
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16. Lian J., Zhu B., Li X., Chen P. In-situ Synthesis of Column-like Mullite and SiC Whiskers and its Effect on Al2O3–SiC–C Refractory Properties. Journal of the Chinesse Ceramic Society, 2016, vol. 44, no. 9. Available at: http://www.gxyb.cbpt.cnki.net (accessed: July 01, 2022). DOI: 10.14062/j.issn.0454-5648.2016.09.21.
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18. Varrik N.M., Maksimov V.G. Synthesis of the initial powder for obtaining mullite ceramics modified with zirconium dioxide. Ogneupory i tekhnicheskaya keramika, 2021, no. 5–6, р. 3.
19. Method for producing a ceramic product: pat. 2486159 Rus. Federation; filed 22.06.11; publ. 27.06.13.
20. Babashov V.G., Maksimov V.G., Varrik N.M. On the question of mullite crystallization in a ceramic composite material. Steklo i keramika, 2021, no. 12, pp. 9–14.
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11.

dx.doi.org/ 10.18577/2307-6046-2023-0-1-128-138

УДК 621.763

Burkovskaya N.P., Bobrovkiy A.P., Efimochkin I.Yu., Bolshakova A.N.

SPHEROIDIZATION OF POWDER COMPOSITIONS BASED ON REFRACTORY METALS (review). Part 1

At present, additive technologies, including layer-by-layer synthesis technologies, are currently one of the most dynamically developing areas of modern materials science. Since raw materials for the production of products by additive technologies are an important component of the process, the development of methods for spheroidizing powder compositions is relevant and has practical significance. The priority goal of additive technologies has always been the manufacture of products from metals with certain physical and mechanical properties, in particular, metals and alloys for high-temperature applications.

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Reference list

1. Kablov E.N. Innovative developments of FSUE «VIAM» SSC of RF on realization of «Strategic directions of the development of materials and technologies of their processing for the period until 2030». Aviacionnye materialy i tehnologii, 2015, no. 1 (34), pp. 3–33. DOI: 10.18577/2071-9140-2015-0-1-3-33.
2. Kablov E.N. Materials of the new generation – the basis of innovation, technological leadership and national security of Russia. Intellekt i tekhnologii, 2016, no. 2 (14), pp. 16–21.
3. Kablov E.N. Present and future of additive technologies. Metally Evrazii, 2017, no. 1, pp. 2–6.
4. Wohlers T. Wohlers Report 2014: Additive Manufacturing and 3D Printing State of the Industry. Annual Worldwide Progress Report. Wohlers Associates Inc., 2014, 275 p.
5. Uriondo A., Esperon-Miguez M., Perinpanayagam S. The present and future of additive manufacturing in the aerospace sector: A review of important aspects: Proceedings of the Institution of Mechanical Engineers. Part G. Journal of Aerospace Engineering, 2015, vol. 229, no. 11, pp. 2132–2147.
6. Zlenko M.A., Popovich A.A., Mutylina I.N. Additive technologies in mechanical engineering. St. Petersburg: Polytech. Univ., 2013, 222 p.
7. Frazier W.E. Metal Additive Manufacturing: A Review. Journal of Materials Engineering and Performance, 2014, vol. 23, no. 6, pp. 1917–1928.
8. Lopatin A.N., Zverkov I.D. Shaping molding tools production for composite parts by means of additive technologies. Aviacionnye materialy i tehnologii, 2019, no. 2 (55). pp. 53–59. DOI: 10.18577/2071-9140-2019-0-2-53-59.
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12.

dx.doi.org/ 10.18577/2307-6046-2023-0-1-139-156

УДК 547-31/-39,547.874+62-03

Dolgova E.V.

APPLICATION OF CYANATE ESTER MATERIALS Part 2. Microelectronics, 3D printing, radiation protection

The publication is a continuation of the review of application of cyanate ester materials. This article provides information about prospects for the useing of cyanate ester resins in microelectronics, as well as in relatively new applications for these resins, such as the insulation of superconducting magnets and additive technologies. The main advantages of cyanate esters polymers (polytriazines) are described and examples of commercial foreign materials are given.

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13.

CONTENТS

Heat-resistant alloys and steels

Sevalnev G.S., Nefedkin D.Y., Druzhinina M.E., Mosolov A.N., Samoylova I.I., Maksimov A.V. Kinetics of diffusion saturation of beryllium-containing steel VNS32-VI at various types of thermochemical treatment

Sukhov D.I., Kaplansky Yu.Yu., Rogalev A.M., Kurkin S.E. The features of processing Cr-rich nickel based alloy by selective laser melting

Peskova A.V., Bakradze M.M., Tikhonov M.M., Kuko I.S. Investigation of the influence of the oxide layer on the surface of particles metal-powder compositions of copper-chromium alloys on their technological properties

Light-metal alloys

Lukina E.A., Naprienko S.A., Gorbovets M.A., Zaitsev D.V., Oglodkova Yu.S. Changes in the structural and phase state of cold-formed semi-finished products from Al–Li- alloys after various low-temperature effects

Nerush S.V., Kaplanskii Yu.Yu., Dynin N.V., Benarieb I., Savichev I.D. Development of laser powder bed fusion parameters, structure and mechanical properties of a high-strength aluminum alloy Al–Ce–Cu

Sbitneva S.V., Lukina E.А., Benarieb I. Some structural features of aluminum alloys obtained by selective laser melting (review)

Composite materials

Lucenko A.N., Efimochkin I.Yu., Moiseeva N.S. Study mechanism formation a surface layer metal composite material based on Mo–Si–B system after high-temperature influence at different angles of attack

Zhitnyuk S.V., Medvedev P.N. Investigation of microstructure and phase composition of the metallic composite material Al–Si–Mg system modified by silicon carbide particles by mechanical alloying. Part 1

Maksimov V.G., Babashov V.G., Varrik N.M., Lyulyukina G.Yu. Study of the habitus of mullite crystals in composite ceramics «mullite–zirconium dioxide»

Burkovskaya N.P., Bobrovsky A.P., Efimochkin I.Yu., Bolshakova A.N. Spheroidization of powder compositions based on refractory metals (review). Part 1

Dolgova E.V. Application of cyanate ester materials. Part 2. Microelectronics, 3D printing, radiation protection

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