Production of Ceramic Materials Based on SiC with Low-Melting Oxide Additives

Перевислов, С. Н.; Лысенков, А. С.; Титов, Д. Д.; Томкович, М. В.; Kim, K. A.; Фролова, М. Г.; Kargin, Yu. F.; Melnikova, I. S.

doi:10.1007/s10717-019-00094-6

Cited by 40 publications

(3 citation statements)

References 25 publications

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“…The primary component of the matrix is alumina, which is known as an excellent dielectric [216, 217], but some researchers consider it an n-type semiconductor with a permittivity of 9.5–10.0 and an electric strength of 10 kV/mm [218]. The melting point of aluminium oxide is 2044 °C, whereas the boiling point is 2977 °C [219, 220, 221, 222]. Note that the boiling point of any alloy depends on its components.…”

Section: Discussionmentioning

confidence: 99%

Electrical discharge machining of ceramic nanocomposites: sublimation phenomena and adaptive control

Grigoriev

Kozochkin

Porvatov

et al. 2019

Heliyon

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The productivity of electrical discharge machining (EDM) is relatively low owing to the natural laws of electrical erosion. Precise EDM demands uninterrupted control of the discharge gap and adjustment of process parameters. It is particularly critical for processing large workpieces with complex linear surfaces and for materials with threshold conductivities such as the new advanced ceramic nanocomposites Al2O3+TiC and Al2O3+SiCw+TiC(30–40%). In these cases, adequate flushing of erosion products is hampered by the geometry of the working space or by the small value of the required discharge gap, which does not exceed 2.2–2.5 μm. The methods of adaptive control in modern computer numerical control systems of EDM equipment based on measuring the electrical parameters in the working zone have been shown to be ineffective in the cases described above. This study aims to investigate the natural phenomena of material sublimation under discharge pulses for conductive ceramics and nanocomposites. The measured conductivities of the samples are higher than the percolation threshold. However, the question of machinability remains open owing to detected processing interruptions and poor quality of machined surfaces. New knowledge on EDM of conductive ceramics and nanocomposites can improve the final quality of the machined surfaces and productivity of the method by the introduction of advanced monitoring and control methods based on acoustic emissions. The manuscript presents an up-to-date overview and current state of the research on the subject area. The obtained morphology of the samples and discussion of the findings complete the experimental part of the study. The scientific basis for a new type of adaptive control system is provided. This can improve the effectiveness of parameter control for machining conductive ceramics and nanocomposites and contribute to an increase in the EDM performance for the most critical cases.

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Section: Discussionmentioning

confidence: 99%

Electrical discharge machining of ceramic nanocomposites: sublimation phenomena and adaptive control

Grigoriev

Kozochkin

Porvatov

et al. 2019

Heliyon

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“…Nonetheless, this process is costly, time-consuming, and frequently results in the final material containing a considerable proportion of enclosed pores [13][14][15]. One of the most technologically straightforward methods for manufacturing silicon carbide ceramics involves liquid-phase sintering using specific additives [16]. This process or siliconization with molten silicon employs porous workpieces pre-formed from primary silicon carbide powders, a blend of carbon powders, or their combinations [17][18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Layered SiC/C/Si/MeSi2/Me Ceramic–Metal Composites via Liquid Silicon Infiltration of Metal–Carbon Matrices

Kaledin,

Shikunov,

Zubareva

et al. 2024

Materials

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The growing demand for composite materials capable of enduring prolonged loads in high-temperature and aggressive environments presents pressing challenges for materials scientists. Ceramic materials composed of silicon carbide largely possess high mechanical strength at a relatively low density, even at elevated temperatures. However, they are inherently brittle in nature, leading to concerns about their ability to fracture. The primary objective of this study was to develop a novel technique for fabricating layered composite materials by incorporating SiC-based ceramics, refractory metals, and their silicides as integral constituents. These layered composites were produced through the liquid-phase siliconization method applied to metal–carbon blanks. Analysis of the microstructure of the resultant materials revealed that when a metal element interacts with molten silicon, it leads to the formation of a layer of metal silicide on the metal’s surface. Furthermore, three-point bending tests exhibited an enhancement in the bending strength of the layered composite in comparison to the base silicon carbide ceramics. Additionally, the samples demonstrated a quasi-plastic nature during the process of destruction.

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“…Сложный карбид титана-кремния (Ti 3 SiC 2 ) -одна из наиболее распространенных МАХ-фаз [2][3][4][5][6][7]. Этот материал является легким (плотность 4,52 г/см 3 ) и относительно мягким (HV 4 ГПa), имеет высокие температуру плавления (3200 °С) и модуль упругости (322 ГПа) и может составлять конкуренцию стандартным реакционноспеченной и жидкофазно-спеченной керамике на основе B 4 C и SiC [8][9][10][11][12][13][14] в качестве конструкционного материала. Плотные материалы состава Ti 3 SiC 2 можно синтезировать разными способами: химическим осаждением из газовой фазы (CVD) [15], самораспространяющимся высокотемпературным синтезом (SHS) [16], горячим прессованием (HP) [17].…”

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Physical and mechanical properties of materials based on Ti<sub>3</sub>SiC<sub>2</sub>

Перевислов

Arlashkin²,

Лысенков³

2022

Nov. ogneup.

Self Cite

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Using various initial components, a complex titaniumsilicon carbide of the composition Ti3SiC2 was synthesized in a high-temperature furnace at 1400 °C for 1 h and by hot pressing at a temperature of 1350 °C, a pressure of 30 MPa, for 15 min. The Rietveld method was used to calculate the content of the Ti3SiC2 phase, which, upon hot pressing, of the Ti : Si : TiC components in a ratio of 1 : 1,2 : 1,8 98,6 vol. %. The microstructure was investigated and the phase composition of hot-pressed materials was studied. The physical and mechanical characteristics of sintered and hot-pressed materials based on the Ti3SiC2 phase have been studied. Ill. 2. Ref. 24. Tab. 3..

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Production of Ceramic Materials Based on SiC with Low-Melting Oxide Additives

Cited by 40 publications

References 25 publications

Electrical discharge machining of ceramic nanocomposites: sublimation phenomena and adaptive control

Electrical discharge machining of ceramic nanocomposites: sublimation phenomena and adaptive control

Fabrication of Layered SiC/C/Si/MeSi2/Me Ceramic–Metal Composites via Liquid Silicon Infiltration of Metal–Carbon Matrices

Physical and mechanical properties of materials based on Ti<sub>3</sub>SiC<sub>2</sub>

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