Liquid phase formation in the system SiC, Al2O3, Y2O3

Neher, R.; Herrmann, Matthias; Brandt, K.; Jaenicke-Roessler, K.; Pan, Zhu; Fabrichnaya, Olga; Seifert, H. J.

doi:10.1016/j.jeurceramsoc.2010.09.002

Cited by 46 publications

(14 citation statements)

References 17 publications

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“…Al 2 O 3 and Y 2 O 3 play the important role of forming a liquid phase (commonly called flux) during sintering that facilitates mass transport of SiC through the liquid, thus reducing the temperature to densify the SiC matrix . A molar ratio of 5Al 2 O 3 /3Y 2 O 3 has been selected because it enables liquid formation during sintering and at the same time improves the final mechanical properties of the sintered material due to precipitation of the Y 3 Al 5 O 12 (YAG) at the grain boundaries . The experimental methods for the development and characterization of SiC with Al 2 O 3 and Y 2 O 3 colloidal gel inks are presented here.…”

Section: Introductionmentioning

confidence: 99%

Geometrically Complex Silicon Carbide Structures Fabricated by Robocasting

et al. 2012

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Geometrically complex, three‐dimensional (3‐D) structures of SiC were produced by a colloidal printing method known as robocasting, followed by low‐pressure spark plasma sintering (SPS) to produce dense ceramic bodies. A concentrated, aqueous colloidal ink consisting of SiC, Al2O3, and Y2O3 particles in a dilute polymer solution with a total solids volume fraction of 0.44 was developed to have pseudoplastic behavior with yield stress rheology. Lattice structures consisting of extruded filaments deposited in an overall cylindrical or cuboid shape were printed through nozzles ranging in diameter from 150 to 330 μm. After printing, drying and calcining processes, the structures were sintered at 1700°C in argon by SPS. The final average grain size was 1–2 μm and samples displayed above 97% of theoretical density, showing ~22.8% linear shrinkage from green to sintered state.

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Section: Introductionmentioning

confidence: 99%

Geometrically Complex Silicon Carbide Structures Fabricated by Robocasting

et al. 2012

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“…1 SiC has high thermal conductivity, good mechanical strength, and excellent corrosion and oxidation resistance. [2][3][4][5][6][7][8][9][10] Thus, SiC has many structural and functional applications, such as in gas turbine components, fusion reactors, heat exchangers, hot-gas filters, heaters and dummy-wafers for semiconductor processing, and optical mirrors. SiC is also a promising substitute for Si in microelectronic device applications requiring reliable operation at high temperature, high power, and high frequencies.…”

Section: Introductionmentioning

confidence: 99%

Influence of Y2O3 addition on electrical properties of β-SiC ceramics sintered in nitrogen atmosphere

Kim

Lim

Kim

2012

Journal of the European Ceramic Society

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“…But its low strength and poor toughness restrict its more extensively applications [1] [2]. Y 2 O 3 -Al 2 O 3 as sintering additives of SiC ceramic have been used for many years [3] [4]. The phase relationship of SiC-Y 2 O 3 -Al 2 O 3 system has also been studied by calculation [5] and experiment [6].…”

Section: Introductionmentioning

confidence: 99%

Phase Relations in Si-Al-Y-O-C Systems

Yinchuan¹

2015

MSCE

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The present work investigated the phase relations in SiC-Al2O3-Y2O3-SiO2 (Si-Al-Y-O-C) system. As a continuation of our previous works, the purpose of this study is to understand the high temperature reaction behaviors of SiO2 in the system and its effect on the phase relations of the valuable system of SiC-Al2O3-Y2O3. The phase compositions of six solid-state reacted samples with different components of Y2O3:Al2O3:SiC:SiO2 were analyzed by XRD. The phase relations of the systems were determined. The subsolidus phase diagrams of ternary Al2O3-SiC-SiO2 system and the tentative phase diagram of an extended quaternary Y2O3-Al2O3-SiC-SiO2 system were presented latter involving several coexisting regions of four phases. The high temperature reaction behavior of SiO2 in the system and its effect on the phase relations of system were discussed.

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Liquid phase formation in the system SiC, Al2O3, Y2O3

Cited by 46 publications

References 17 publications

Geometrically Complex Silicon Carbide Structures Fabricated by Robocasting

Geometrically Complex Silicon Carbide Structures Fabricated by Robocasting

Influence of Y2O3 addition on electrical properties of β-SiC ceramics sintered in nitrogen atmosphere

Phase Relations in Si-Al-Y-O-C Systems

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