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
收藏
页码：772 / 777
页数：6
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