Influence of Nano-Silica on Microstructure and Mechanical Properties of SiO2/BN Ceramics
In this paper, nano-silica particles were incorporated to a fused silica-boron nitride dual phase ceramics originally using micrometer sized particles as starting powders. Effects of nano-silica content on density, sintering behavior, mechanical properties and microstructure of the dual phase ceramics were investigated. It was found that with the addition of nano-silica particles, the density and mechanical properties of the dual phase ceramics increased. Flexural strength and fracture toughness of them attained to 51.4MPa and 0.8MPa·m1/2, respectively. The increased density and spatial network structure of fused silica attribute to the improvement of the mechanical properties of the dual phase ceramics.
Yu Zhou, Shan-Tung Tu and Xishan Xie
L. Z. Zhou and D. C. Jia, "Influence of Nano-Silica on Microstructure and Mechanical Properties of SiO2/BN Ceramics ", Key Engineering Materials, Vols. 353-358, pp. 1529-1532, 2007