Influence of Pressure on the Crystallization in SiO_2f/SiO₂ Composites

Abstract:

The influence of pressure on the crystallization behavior in SiO2f/SiO2 composites hotpressed at 1350°C was studied. The crystalline phase composition analysis on SiO2f/SiO2 composites revealed that the formation of cristobalite was promoted when the hot-pressing pressure ≤ 12 MPa, however suppressed with higher pressure applied. It can be ascribed to the nucleation mechanism change from surface nucleation to bulk nucleation. Analysis on relative density as well as fracture microstructure of SiO2f/SiO2 composites confirmed the conclusion.

• Periodical: Key Engineering Materials (Volumes 336-338)
• Pages: 1236-1238
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.336-338.1236
• Online since: April 2007
• Authors: Chang Ming Xu, Shi Wei Wang, Xiao Xian Huang, Jing Kun Guo
• Keywords: Crystallization, Pressure, Relative Density, SiO_2f/SiO₂ Composites

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