Investigation of effect of siliconization conditions on mechanical properties of 3D-stitched C-SiC composites

▶ 3D-stitched C-C preforms of thickness 50 mm can be siliconized. ▶ The effect of siliconization conditions on strengths is significant. ▶ Flexural and tensile strengths increase with siliconization temperature and time. ▶ The Weibull modulus 'm' is about 10 for all the blocks siliconized for 120 min at all temperatures. ▶ Non-uniform shrinkage of C-C preforms is the major factors responsible for scatter in the mechanical properties.