Preparation of Si2N2O Ceramics by Spark Plasma Sintering

被引：3

作者：

Alekseeva, L. S. ^{[1
]}

Andreev, P., V ^{[1
]}

Drozhilkin, P. D. ^{[1
]}

Boldin, M. S. ^{[1
]}

Smetanina, K. E. ^{[1
]}

Murashov, A. A. ^{[1
]}

Karazanov, K. O. ^{[1
]}

Shcherbak, G., V ^{[1
]}

机构：

[1] Lobachevsky State Univ, Nizhnii Novgorod 603022, Russia

来源：

INORGANIC MATERIALS | 2022年 / 58卷 / 07期

关键词：

silicon oxynitride; spark plasma sintering; ceramics; density; SILICON-NITRIDE; MECHANICAL-PROPERTIES; MICROSTRUCTURE; FABRICATION; OXYNITRIDE;

D O I：

10.1134/S0020168522070020

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Powder mixtures based on Si3N4 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 degrees C/min. The microstructure of the samples has been shown to be formed by Si2N2O grains similar to 0.7 mu m in size, with an amorphous oxide phase in between. The highest hardness (13.3 GPa) was reached by the sample containing the Y2O3 and Al2O3 oxides in the molar ratio 2 : 1 and obtained at a sintering temperature of 1770 degrees C.

引用

页码：772 / 777

页数：6

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