Structural-Phase State and Properties of SiC Ceramics Obtained by Ultrasound-Assisted Liquid-Phase Sintering with Eutectic Additives

Аbilev, Мadi; Zhilkаshinova, Almira; Pavlov, Aleksandr; Zhambakin, Dauren; Tuyakbayev, Baurzhan

doi:10.1007/s12633-023-02318-5

Cited by 3 publications

(7 citation statements)

References 27 publications

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“…The analysis of oxide powders was previously studied in detail [15]. The average size of the main initial component of the SiC powder was determined with Winner-2005A Intelligent Laser Particle Size Analyzer (Jinan Winner Particle Instrument Stock Co., Jinan, China) with measuring range of 0.1-1000 µm.…”

Section: Methodsmentioning

confidence: 99%

“…To achieve the goal, the study was performed according to the flowchart presented in Figure 1. Based on previous studies [15] and a series of experimental results on the selection of the optimal chemical composition, three potential concentrations were determined:…”

Section: Design Of the Experimentsmentioning

confidence: 99%

“…% SiCmicro + 4.5 wt. % SiO2micro; Based on previous studies [15] and a series of experimental results on the selection of the optimal chemical composition, three potential concentrations were determined:…”

Section: Design Of the Experimentsmentioning

confidence: 99%

“…Our earlier studies led to the conclusion that the optimum sintering temperature of ceramics based on silicon carbide can be reduced during the liquid-phase formation of a structure with nanoadditives, which made it possible to reduce the temperature to an average of 1800 • C [14,15]. The appearance of a melt of oxide additives in such a system had a positive effect on the sintering process, which contributed to the reorientation of silicon carbide grains and the filling of voids that form at the stage of product molding.…”

Section: Introductionmentioning

confidence: 99%

“…% + SiO 2µm 4.5 wt. % [15]. At the same time, the technology of consolidating powder mixtures was carried out due to ultrasound influence.…”

Section: Introductionmentioning

confidence: 99%

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Structure and Properties of Spark Plasma Sintered SiC Ceramics with Oxide Additives

et al. 2023

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This article describes spark plasma sintering of ceramics based on silicon carbide with nanoadditives, as follows: MnOnano 5.5 wt. % + Al2O3nano 2.0 wt. % + SiCnm (37–57 wt. %) + SiCµm (31–51 wt. %) + SiO2µm 4.5 wt. %. Sintering was carried out at 2000 °C. The diffraction pattern of the analyzed sample showed the presence of silicon carbide with a hexagonal crystal lattice. Residual amounts of rhombohedral SiC, α-Fe, and a solid solution of silicon in iron were also found. The method of thermogravimetric analysis established the change in mass, heat flow, temperature of the samples, and the change in the partial pressures of gases during the experiment. Samples obtained by SPS show a higher density of the material at the level of 3.3 g/cm3, average mechanical strength of 454 MPa, and microhardness of 35 GPa, compared with samples obtained by liquid-phase sintering. The SPS method also made it possible to obtain materials with a higher density (by 8%) and practically no significant crystal growth compared to samples obtained by liquid phase sintering. The results of the study facilitate the achievement of a combination of new approaches to the design of compositions and the technology of manufacturing SiC ceramics, which significantly expands their areas of application.

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Section: Methodsmentioning

confidence: 99%

Section: Design Of the Experimentsmentioning

confidence: 99%

Section: Design Of the Experimentsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…% + SiO 2µm 4.5 wt. % [15]. At the same time, the technology of consolidating powder mixtures was carried out due to ultrasound influence.…”

Section: Introductionmentioning

confidence: 99%

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Structure and Properties of Spark Plasma Sintered SiC Ceramics with Oxide Additives

et al. 2023

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Interaction of SiC with Al2O3−(t + m)ZrO2(Y2O3) Oxide Composition

Frolova,

Lysenkov,

Perevislov

et al. 2023

Russ. J. Inorg. Chem.

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Interaction of SiC with Al2O3−(t + m)ZrO2(Y2O3) Oxide Composition

Ivannikov,

Mel’nikov,

Kargin

et al. 2023

Žurnal neorganičeskoj himii

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We employed contact alloying in the range 1000–1860°С to study the reaction specifics between SiC and Al2O3−(t + m)ZrO2(Y2O3) oxide composition. Real-time experiments with photographic recording of the changing size and shape of the Al2O3−(t + m)ZrO2(Y2O3) sample on a SiC ceramic substrate showed that Al2O3−(t + m)ZrO2(Y2O3) compositions react with the silicon carbide substrate in the range 1720–1860°С to melt and penetrate into (impregnate) the substrate. X-ray powder diffraction patterns were measured for samples taken from the contact area of the oxide composition with SiC directly on the substrate and in a chipped-off 1-mm-deep near-surface layer. ZrС, Al2Y4O9, and Al3.21Si0.47 were formed in the contact area via redox reactions involving oxide melt, in addition to 6H-SiC, Si and Al2O3, t-ZrO2 phases, which are the initial components of the substrate and oxide composition, respectively.

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Structural-Phase State and Properties of SiC Ceramics Obtained by Ultrasound-Assisted Liquid-Phase Sintering with Eutectic Additives

Cited by 3 publications

References 27 publications

Structure and Properties of Spark Plasma Sintered SiC Ceramics with Oxide Additives

Structure and Properties of Spark Plasma Sintered SiC Ceramics with Oxide Additives

Interaction of SiC with Al2O3−(t + m)ZrO2(Y2O3) Oxide Composition

Interaction of SiC with Al2O3−(t + m)ZrO2(Y2O3) Oxide Composition

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