Effects of hypervelocity impact on thermal expansion behavior of 2.5D carbon/carbon composites from 850 °C to 2500 °C

Effects of impact defects on thermal expansion behavior of 2.5D C/C composites were studied in this work. A 6 mm steel ball driven by solid explosive was used as a projectile to simulate hypervelocity impact of debris or flying stones. The coefficients of thermal expansion (CTEs) of post-impacted samples located in different areas were investigated from 850 to 2500 °C. The results show that impact defects are primarily focused on crater regions....