期刊
出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2017.10.046
关键词
Mechanical properties; Al2O3-refractories; Silicon hybridized expanded graphite; Hybrid
类别
资金
- Natural Science Foundation of China [51372176]
- Department of Science and Technology [2014CB660802]
Expanded graphite (EG) is a promising reinforcement for fabricating Al2O3-C refractories. However, the smooth surface of EG layers results in weak interfacial bonding strength between EG and matrix. Meanwhile, the EG is prone to react with antioxidants or reactive vapors (Al (g), Si (g) and SiO (g)) at high temperature. To overcome these problems, two kinds of silicon hybridized EG were introduced into Al2O3-C refractories. They are beta-SiC whiskers hybridized EG (labeled as EG/SiC) and SiOx spheres hybridized EG (labeled as EG/SiOx), respectively. Afterward, the microstructure and mechanical properties of Al2O3-C refractories coked at the temperatures ranging from 800 degrees C to 1400 degrees C were investigated in this work. The results showed that the interfacial characterization of EG/SiC and EG/SiOx hybrids were remarkably improved compared with original EG. Moreover, the EG/SiC and EG/SiOx hybrid remained relative intact structure at high temperature. In addition, the mechanical properties such as cold modulus of rupture (CMOR), force and displacement of Al2O3-C specimens containing hybrids were improved in comparison with the specimen containing original EG. Furthermore, with the addition of EG/SiC or EG/SiOx hybrid, the thermal shock resistance of Al2O3-C refractories was considerably promoted. The above enhanced mechanical properties could attribute to the hybridized beta-SiC whiskers and SiOx spheres on EG, which were pulled out to consume the fracture energy when the Al2O3-C specimens were bearing loading.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据