Silicon Nitride–Silicon Carbide Nancocomposites Fabricated by Electric-Field-Assisted Sintering |
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Authors: | Julin Wan Matthew J. Gasch Amiya K. Mukherjee |
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Affiliation: | Department of Chemical Engineering and Materials Science, University of California, Davis, California 95616 |
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Abstract: | Starting with Si-C-N(-O) amorphous powders, and using the electric field assisted sintering (EFAS) technique, silicon nitride/silicon carbide nanocomposites were fabricated with yttria as an additive. It was found that the material could be sintered in a relatively short time (10 min at 1600°C) to satisfactory densities (2.96–3.09 g/cm3) using 1–8 wt% yttria. With decreasing yttria content, the ratio of SiC to Si3N4 increased, whereas the grain size decreased from ∼150 nm to as small as 38 nm. This offers an attractive way to make nano-nanocomposites of silicon nitride and silicon carbide. |
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Keywords: | silicon nitride silicon carbide sintering nanocomposites |
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