High-temperature deformation of α-SiAlON nanoceramics without additives

被引：11

作者：

Chihara, Kentarou

Hiratsuka, Daisuke

Tatami, Junichi

Wakai, Fumihiro

Komeya, Katsutoshi

机构：

[1] Tokyo Inst Technol, Secure Mat Ctr, Mat & Struct Lab, Yokohama, Kanagawa 2268503, Japan

[2] Yokohama Natl Univ, Grad Sch Environm & Informat, Yokohama, Kanagawa 2408501, Japan

来源：

SCRIPTA MATERIALIA | 2007年 / 56卷 / 10期

关键词：

silicon nitride-based ceramics; grain boundary structure; high-temperature deformation; compression test;

D O I：

10.1016/j.scriptamat.2007.01.039

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A Ca-alpha SiAlON nanoceramic was fabricated from Ca0.8Si9.6Al2.4O0.8N15.2 nanopowder without using any sintering additive. The flow stress of the SiAlON nanoceramic, which contained almost no glass phase, was higher than that of liquid phase sintered SiAlONs containing a large amount of glass phase. The deformation was characterized by Newtonian flow in a wide range of stresses, and shear-thickening creep, which has been reported in liquid containing SiAlONs, was not observed. (c) 2007 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：871 / 874

页数：4

共 19 条

[1] Densification behavior and properties of Y2O3-containing alpha-SiAlON-based composites [J].