Microstructure Development and Phase Evolution of Alumina-mullite Nanocomposite

作     者：Sedaghat, A. Taheri-Nassaj, E. Soraru, G. D. Ebadzadeh, T. 

作者机构：Tarbiat Modares Univ Dept Mat Sci & Engn Tehran Iran Univ Trento Dept Mat Engn & Ind Technol I-38050 Trento Italy Mat & Energy Res Ctr Tehran Iran 

出 版 物：《SCIENCE OF SINTERING》 (烧结学)

年 卷 期：2013年第45卷第3期

页      面：293-303页

核心收录：

学科分类：0806[工学-冶金工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

主　　题：Phase evolution Microstructure development Alumina Mullite Nanocomposite 

摘      要：In this work, alumina-mullite composites (5-15 vol.%) were prepared using sol-gel derived alumina composite nanopowders. The results revealed the formation of intragranular and intergranular mullites inside and between the alumina grains, respectively. Accordingly, the intragranular mullites (average grain size, 0.3 mu m) were smaller than the intergranular mullites (average grain size, 0.5 mu m). Moreover, the alumina grains (average grain size, 1.0 mu m) are larger than the mullites. Meanwhile, the mullites showed positive results in the prevention of the alumina grains growth and the retardation of densification. The relative density of alumina-15 vol.% mullite that was sintered at 1650 degrees C for 2 h, was obtained as 98.7 %. After sintering at 1750 degrees C for 2 h, the mullite was decomposed.