Journal Article10.1111/J.1151-2916.1997.TB02945.X
Effect of Weight Loss on Liquid‐Phase‐Sintered Silicon Carbide
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TL;DR: In this paper, the evaporation of silicon carbide (SiC) ceramics during sintering has been studied by thermogravimetry in a graphite furnace filled with argon.
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Abstract: The evaporation of silicon carbide (SiC) ceramics during sintering has been studied by thermogravimetry in a graphite furnace filled with argon. The SiC powder compacts contained 7.5 wt% eutectic composition of Y2O3–Al2O3 to promote liquid-phase sintering. A weight loss of 1–11 wt% was observed during sintering, depending on the sintering temperature and sintering time. The weight loss severely influenced the final density and the microstructure of the SiC ceramics. Particularly, the oxide sintering aids, which were homogeneously distributed in the green ceramics, were observed to segregate and form particular patterns that were dependent on the temperature, sintering time, and the total weight loss. Possible heterogeneous reactions evolving volatile species have been discussed in relation to the experimental observations.
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Citations
Sintering additives for SiC based on the reactivity: A review
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TL;DR: In this paper, the Gibbs free energy (GFE) was used to predict the reactivity between the sintering additive and SiC, particularly for liquid phase SiC at 1700-1900°C. This was verified by the experimental results for various types of Sintering additives such as main group metals, metal oxides, and rare earth elements.
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Processing of polysiloxane-derived porous ceramics: a review
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TL;DR: In this article, a review deals with processing strategies of polysiloxane-derived porous ceramics and the essential features of processing strategies are explained and the available literature reports are thoroughly reviewed with particular regard to the critical issues that affect pore characteristics.
146
Characterization of rare earth aluminosilicate glasses
TL;DR: In this paper, several rare earth silicate glasses (Y, La, Nd, Dy and Yb) were prepared based on 60%SiO 2 −20%Al 2 O 3 -20%RE 2 O3 (mol%) compositions.
123
Porous Silicon Carbide Sintered Substrates for High-Temperature Membranes
Varaporn Suwanmethanond,Edward Goo,Paul K. T. Liu,George Johnston,Muhammad Sahimi,Theodore T. Tsotsis +5 more
TL;DR: In this article, the porosity, pore size distribution, and transport characteristics of the resulting SiC-sintered bodies depend on the nature of the original powder, the particle size in the green SiC samples, and the type and molar ratio of the sintering aid utilized.
109
Densification of liquid phase sintered silicon carbide
TL;DR: In this paper, the densification and phase formation of liquid phase sintered silicon carbide (LPSSiC) with 10% additives were investigated, and the ratio of the Al 2 O 3 /Y 2 O O 3 -additives was changed between 4:1 and 1:2.
109
References
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Mamoru Omori,Humihiko Takei +1 more
TL;DR: In this paper, a pressureless sintering of SiC with oxide additives was performed at 2100°C with the products of the reaction of Al(OH)3 with HCl and of Y(OH3 with HCOOH.
258
Melting behaviour and metastability of yttrium aluminium garnet (YAG) and YAlO3 determined by optical differential thermal analysis
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•Journal Article
Low-temperature pressureless sintering of β-silicon carbide with aluminum oxide and yttrium oxide additions
M. A. Mulla,V. D. Krstic +1 more
TL;DR: On a fritte β-SiC a plus de 95% de la densite theorique entre 1850 et 1950°C avec addition of Al 2 O 3 and Y 2O 3 as discussed by the authors.
153
Homogeneous Distribution of Sintering Additives in Liquid-Phase Sintered Silicon Carbide
TL;DR: In this paper, the addition of sintering additives to silicon carbide particles by electrostatic adsorption of colloidal A12O3 and Y2O3 sols has been studied as a way to achieve an optimum homogeneity in the microstructure.
63
•Journal Article
The termodynamic properties of the oxides of zirconium, hafnium, and yttrium
TL;DR: In this article, the sublimation of ZrO 2, HfO 2 and Y 2 O 3 in the temperature ranges 2600-2900, 2650-2950, and 2550-2800 K respectively has been studied by the Knudsen effusion method with mass-spectral analysis of the composition of the gas phase.
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