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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
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.
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页码:17067 / 17073
页数:7
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