Effect of Si addition on the mechanical and thermal properties of sintered reaction bonded silicon nitride

被引：23

作者：

Li, Wenjie ^{[1
]}

Wu, Youliang ^{[1
]}

Huang, Rongxia ^{[1
]}

Ye, Shunda ^{[1
]}

Lin, Hua-Tay ^{[1
]}

机构：

[1] Guangdong Univ Technol, Sch Electromech Engn, Guangzhou 510006, Guangdong, Peoples R China

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2017年 / 37卷 / 15期

基金：

中国国家自然科学基金;

关键词：

Si-3; N-4; Si; Cost-effective; Mechanical and thermal properties; PARTICLE SIZES; POWDER; MICROSTRUCTURE; CERAMICS; BEHAVIOR; ZRO2; CONDUCTIVITY; DILUENTS;

D O I：

10.1016/j.jeurceramsoc.2017.06.029

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：

Advanced silicon nitride (Si3N4) ceramics were fabricated using a mixture of Si3N4 and silicon (Si) powders via conventional processing and sintering method. These Si3N4 ceramics with sintering additives of ZrO2 + Gd2O3 + MgO were sintered at 1800 degrees C and 0.1 MPa in N-2 atmosphere for 2 h. The effects of added Si content on density, phases, microstructure, flexural strength, and thermal conductivity of the sintered Si3N4 samples were investigated in this study. The results showed that with the increase of Si content added, the density of the samples decreased from 3.39 g/cm(3) to 2.92 g/cm(3) except for the sample without initial Si3N4 powder addition, while the thermal diffusivity of the samples decreased slightly. This study suggested that addition of Si powder, which varied from 0 to 100%, in the starting materials might provide a promising route to fabricate cost-effective Si3N4 ceramics with a good combination of mechanical and thermal properties. (c) 2017 Elsevier Ltd. All rights reserved.

引用

页码：4491 / 4496

页数：6

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