Influence of Sintering Aid on the Translucency of Spark Plasma-Sintered Silicon Nitride Ceramics

被引：10

作者：

Yang, Wenwu ^{[1
]}

Hojo, Junichi ^{[2
]}

Enomoto, Naoya ^{[2
]}

Tanaka, Yumi ^{[2
]}

Inada, Miki ^{[2
]}

机构：

[1] Kyushu Univ, Grad Sch Engn, Dept Chem & Biochem, Fukuoka 8190395, Japan

[2] Kyushu Univ, Dept Appl Chem, Fac Engn, Fukuoka 8190395, Japan

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 2013年 / 96卷 / 08期

关键词：

REFRACTIVE-INDEX; SIALON CERAMICS; OPTICAL-PROPERTIES; FILMS; MICROSTRUCTURE; FABRICATION; SYSTEMS; POWDER; SPINEL; SIZE;

D O I：

10.1111/jace.12370

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Single additives (Y2O3, MgO, and Al2O3) were used as sintering aid of Si3N4. The density, crystal phase, microstructure, transmittance, hardness, and fracture toughness of sintered Si3N4 were investigated. Highly densified sintered bodies were obtained in single Y2O3 and MgO systems, but not in single Al2O3 system. The XRD results indicated that sintered bodies were composed of -Si3N4. The SEM images showed that all the sintered bodies had a fine-grained microstructure with an average diameter of 0.29-0.37m. The thickness of grain boundary was changed with additive content. The transmittance (T) and the wavelength (lambda) followed the relationship of T exp(-(-2.3)) due to the light scattering. The transmittance was mainly influenced by the refractive index of additives and the thickness of grain boundary phase. The hardness and fracture toughness of sintered ceramics were 12.6-15.5GPa and 6.2-7.2MPam(1/2), respectively.

引用

页码：2556 / 2561

页数：6

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