Theoretical and experimental analyses of Young's modulus and thermal expansion coefficient of the alumina-mullite system

被引：21
|
作者：
Hirata, Yoshihiro [1 ]
Itoh, Shota [1 ]
Shimonosono, Taro [1 ]
Sameshima, Soichiro [1 ]
机构：
[1] Kagoshima Univ, Dept Chem Biotechnol & Chem Engn, 1-21-40 Korimoto, Kagoshima 8900065, Japan
来源：
CERAMICS INTERNATIONAL | 2016年 / 42卷 / 15期
关键词：
Mechanical properties; Thermal expansion; Al2O3; Mullite; CONDUCTIVITY; PARTICLES; COMPACTS;
D O I：
10.1016/j.ceramint.2016.07.216
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：
Young's moduli (E) and thermal expansion coefficients (TECs) of the alumina-mullite-pore system (96.4-99.5% relative density) were measured for a wide mullite fraction range from 0 to 100 vol%. Both E and TEC values decreased at high mullite fractions. These properties were theoretically analyzed with four proposed model structures that were constructed by three-phase systems of mullite (or alumina) continuous phase 2 pore dispersed phase 1 alumina (or mullite) dispersed phase 3. The ratios of E(theoretical)/E(experimental) and TEC(theoretical)/TEC(experimental) were very close to unity, depending on the mullite fraction. That is, the measured E and TEC values are closely related to the change in the composite microstructure as a function of mullite fraction. (C) 2016 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
引用
收藏
页码：17067 / 17073
页数：7
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