Microstructure and Mechanical Properties of 2D Tyranno SA/SiC Composites by Hot Pressing
SiC/SiC composites were fabricated by hot pressing (HP) via liquid phase sintering (LPS) using carbon coated 2D woven Tyranno SA fabrics as reinforcement. Both nano-SiC and micro-SiC powders with sintering additives were used for matrix. The effects of preparation conditions on the microstructure and mechanical properties of the composites were characterized. Highly densified composite was obtained at 1780°C under 20MPa with nano-SiC particles. The strength and elastic modulus of the composite were enhanced. When micro-SiC powder was used, higher strength revealed for the composite sintered at 1780°C under 15MPa, although it was not densified enough. Higher sintering temperature (1800°C) is beneficial for the densification of the composite, but is not obvious for the improvement of mechanical properties.
Yu Zhou, Shan-Tung Tu and Xishan Xie
S. M. Dong et al., "Microstructure and Mechanical Properties of 2D Tyranno SA/SiC Composites by Hot Pressing", Key Engineering Materials, Vols. 353-358, pp. 1489-1492, 2007