Microstructure of Spark Plasma-Sintered Silicon Nitride Ceramics

Nanoscale Research Letters

卷:12

V. Yu. Novikov¹  V. V. Sirota¹  V. V. Krasilnikov¹  O. A. Lukianova¹  A. A. Parkhomenko² 

[1] Belgorod National Research University;

[2] Institute of Solid State Physics, Materials Science and Technologies, NAS of Ukraine;

关键词: Silicon nitride;    Spark plasma sintering;    Microstructure;    Hardness;   

DOI  :  10.1186/s11671-017-2067-z

来源: DOAJ

【 摘 要 】

Abstract 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.

【 授权许可】

Unknown