Preparation of Si2N2O Ceramics by Spark Plasma Sintering

Preparation of Si2N2O Ceramics by Spark Plasma Sintering

— Powder mixtures based on Si 3 N 4 nanoparticles and yttrium and aluminum oxides were prepared. Ceramic samples with a relative density of 95–96% have been produced by spark plasma sintering at a pressure of 80 MPa and a heating rate of 50°C/min. The microstructure of the samples has been shown to...

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Veröffentlicht in:Inorganic materials 2022-07, Vol.58 (7), p.772-777
Hauptverfasser: Alekseeva, L. S., Andreev, P. V., Drozhilkin, P. D., Boldin, M. S., Smetanina, K. E., Murashov, A. A., Karazanov, K. O., Shcherbak, G. V.
Format: Artikel
Sprache:eng
Schlagworte:
Aluminum oxide
Ceramic powders
Chemistry
Chemistry and Materials Science
Heating rate
Industrial Chemistry/Chemical Engineering
Inorganic Chemistry
Materials Science
Nanoparticles
Sintering (powder metallurgy)
Spark plasma sintering
Specific gravity
Yttrium oxide
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Zusammenfassung:— Powder mixtures based on Si 3 N 4 nanoparticles and yttrium and aluminum oxides were prepared. Ceramic samples with a relative density of 95–96% have been produced by spark plasma sintering at a pressure of 80 MPa and a heating rate of 50°C/min. The microstructure of the samples has been shown to be formed by Si 2 N 2 O grains ~0.7 μm in size, with an amorphous oxide phase in between. The highest hardness (13.3 GPa) was reached by the sample containing the Y 2 O 3 and Al 2 O 3 oxides in the molar ratio 2 : 1 and obtained at a sintering temperature of 1770°C.
ISSN:0020-1685
1608-3172
DOI:10.1134/S0020168522070020