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- W2067094025 abstract "The principal objective of this research was to increase the solid loading of silicon carbide (SiC) powder, in an appropriate liquid medium, to a level that is useful for gelcasting technology. A number of factors that determine the maximum concentration of silicon carbide that can be incorporated into a pourable ceramic suspension have been identified. The pH of the system is the most critical processing parameter. Its proper adjustment (pH 11 to 13) allows SiC concentrations exceeding 50%, based on volume, to be routinely achieved without the use of additional dispersing agents. The particle size of SiC was also found to affect the maximum, attainable concentration. The surface area of the powder and the presence of free carbon in the powder, though not significantly influencing the suspension properties, determine the concentration of initiator required to induce polymerization and gelation. SiC specimens have been gelcast for powders in the size range of 0.8 to 8.5 {mu}m; the powders employed contain either {approximately} 0 or 19% carbon by weight. Finally, the generation of bubbles, typically encountered by the use of ammonia to adjust pH has been circumvented by the use of tetramethylammonium hydroxide." @default.
- W2067094025 created "2016-06-24" @default.
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- W2067094025 date "1991-09-01" @default.
- W2067094025 modified "2023-09-25" @default.
- W2067094025 title "Dispersion aspects of silicon carbide gelcasting" @default.
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- W2067094025 doi "https://doi.org/10.2172/10164777" @default.
- W2067094025 hasPublicationYear "1991" @default.
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