Microstructure of Spark Plasma-Sintered Silicon Nitride Ceramics

被引：0
|
作者：
O. A. Lukianova
V. Yu. Novikov
A. A. Parkhomenko
V. V. Sirota
V. V. Krasilnikov
机构：
[1] Belgorod National Research University,Institute of Solid State Physics, Materials Science and Technologies
[2] NAS of Ukraine,undefined
来源：
Nanoscale Research Letters | 2017年 / 12卷
关键词：
Silicon nitride; Spark plasma sintering; Microstructure; Hardness;
D O I：
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中图分类号：
学科分类号：
摘要：
The microstructure and phase composition of the high-content Al2O3-Y2O3-doped spark plasma-sintered silicon nitride were investigated. Fully dense silicon nitride ceramics with a typical α-Si3N4 equiaxed structure with average grain size from 200 to 530 nm, high elastic modulus of 288 GPa, and high hardness of 2038 HV were spark plasma sintered (SPSed) at 1550 °C. Silicon nitride with elongated β-Si3N4 grains, higher hardness of 1800 HV, density of 3.25 g/cm3, and Young’s modulus 300 GPa SPSed at 1650 °C was also reviewed.
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