Effects of Silicon and Microsilica Additive on Microstructure and Mechanical Properties of Al2O3-C Multi-walled Carbon Nanotubes Refractories

被引：0
作者：
Liao N. [1 ]
Li Y. [1 ]
Sang S. [1 ]
机构：
[1] State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan
来源：
Kuei Suan Jen Hsueh Pao/Journal of the Chinese Ceramic Society | 2017年 / 45卷 / 03期
关键词：
Alumina-carbon refractories; Combination of silicon and microsilica; Mechanical properties; Microstructure; Multi-walled carbon nanotubes;
D O I：
10.14062/j.issn.0454-5648.2017.03.16
中图分类号：
学科分类号：
摘要：
The structure evolution of multi-walled carbon nanotubes (MWCNTs) in Al2O3-C matrix with silicon and microsilica additives was investigated. The influences of silicon/microsilica additives as well as silicon additive on the properties of Al2O3-C refractories were analyzed. The results show that a greater content of SiO vapor is formed through the reaction of silicon and microsilica, which stimulates the structure evolution of MWCNTs and facilitates the formation of SiC whiskers at > 800℃. With the formation of large amount of SiC whiskers, the CMOR of Al2O3-C refractories with silicon and microsilica reaches 22.56 MPa, which is greater than that of refractories with only silicon (i.e., 19.24 MPa). However, the specimen without microsilica has a greater residual strength ratio (i.e., 43.51%), compared to the specimen with microsilica (i.e., 28.65%). It is indicated that the MWCNTs are more beneficial to toughening, and SiC whiskers are responsible for strengthening. © 2017, Editorial Department of Journal of the Chinese Ceramic Society. All right reserved.
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页码：433 / 440
页数：7
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