Thermal shock resistance of porous Al2O3-mullite ceramics

被引：41

作者：

Zake-Tiluga, Ieva ^{[1
]}

Svinka, Visvaldis ^{[1
]}

Svinka, Ruta ^{[1
]}

Grase, Liga ^{[1
]}

机构：

[1] Riga Tech Univ, Inst Silicate Mat, LV-1048 Riga, Latvia

来源：

CERAMICS INTERNATIONAL | 2015年 / 41卷 / 09期

关键词：

Alumina; Mullite; Thermal shock resistance; Porous ceramics; ALUMINA; MULLITE; BEHAVIOR; PARTICLES; SIZE;

D O I：

10.1016/j.ceramint.2015.05.116

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：

In this study, the effects of two types of SiO2 sources (amorphous micro-sized SiO2 particles and in situ oxidised SiC nanopowder) on the thermal shock resistance of porous Al2O3-mullite ceramics were compared. The thermal shock resistance was evaluated by measuring the elastic modulus determined by the non-destructive impulse excitation technique after each thermal shock cycle. It was found that materials modified by addition of 2.5 and 5.0 wt% of SiC nanopowder (equivalent to 3.7 and 7.3 wt% of SiO2) have an improved thermal shock resistance compared to unmodified corundum ceramics and ceramics modified with amorphous micro-sized SiO2. (C) 2015 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

引用

页码：11504 / 11509

页数：6

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