Influence of Pressure on the Crystallization in SiO2f/SiO2 Composites
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.
Wei Pan and Jianghong Gong
C. M. Xu et al., "Influence of Pressure on the Crystallization in SiO2f/SiO2 Composites", Key Engineering Materials, Vols. 336-338, pp. 1236-1238, 2007