Journal ArticleDOI
Sintering of Si3N4 Under High Nitrogen Pressure
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TLDR
In this paper, a graphite resistance furnace was used for graphite sintering and Si/sub 3/N/sub 4/ specimens were sintered at 1800 to 1950/sup 0/C under N/sub 2/ pressures of 250 to 300 psi with only minimal degradation and 1 to 2% weight loss.Abstract:
A graphite resistance furnace was used. Si/sub 3/N/sub 4/ specimens were sintered at 1800 to 1950/sup 0/C under N/sub 2/ pressures of 250 to 300 psi with only minimal degradation and 1 to 2% weight loss. CeO/sub 2/ was used as sintering additive. Modulus-of-rupture values up to 63 ksi were obtained. (DLC)read more
Citations
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Relationships between processing, microstructure and properties of dense and reaction-bonded silicon nitride
TL;DR: In this paper, the relationship between powder properties, process conditions, densification and microstructure, as well as the interdependence between microstructures and properties is discussed.
Journal ArticleDOI
Review: Fabrication of engineering ceramics by injection moulding. I. Materials selection
Mohan Edirisinghe,Jrg Evans +1 more
TL;DR: In this paper, a review of the literature on ceramic powders and organic polymers used to compound ceramic injection molding mixtures is presented, with the aim of facilitating the development of the defect-free molding of ceramic components.
Journal ArticleDOI
Fabrication and Secondary‐Phase Crystallization of Rare‐Earth Disilicate–Silicon Nitride Ceramics
TL;DR: The fabrication and intergranular phase devitrification of silicon nitride densified with rare-earth oxide additives has been investigated in this paper, where the addition of the oxides of Sm, Gd, Dy, Er, and Yb, having high melting points and behaving similarly to Y2O3, were compositionally controlled to tailor a microstructure with a crystalline secondary phase of RE2Si2O7.
Journal ArticleDOI
Grain‐Boundary‐Phase Crystallization and Strength of Silicon Nitride Sintered with a YSlAlON Glass
TL;DR: In this paper, it was shown that at a higher temperature of 1450°C, YSiO2N and Y4Si2O7N2 in addition to small amounts of Y2SiO5 were present in high concentrations in residual amorphous phases, and in solid solution with Si3N4 and some crystalline grain boundary phases.
Journal ArticleDOI
Microstructural Evolution and Mechanical Properties of Si3N4 with Yb2O3 as a Sintering Additive
TL;DR: In this paper, the amount of Yb2O3 was used as a sintering aid to enhance the mechanical properties of silicon nitride (Si3N4) ceramics.
References
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Journal ArticleDOI
Pressure sintering of Si3N4
TL;DR: In this article, the sintering process was inferred to be liquid-phase Sintering and divided into two processes; rearrangement and solution-precipitation.
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Pressureless sintering of Si3N4
G. R. Terwilliger,F. F. Lange +1 more
TL;DR: In this paper, the authors investigated the shrinkage by a liquid phase mechanism and bulk decomposition are two countervailing processes in the sintering of Si3N4 powder with the addition of 5 wt % MgO.
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