【作者】 嵇阿琳； 刘建军； 程文； 张小会；

【Author】 Ji alin, Liu jianjun, Cheng wen (The 43rd institute of CASC, Xian China 710025)

【机构】 西安航天复合材料研究所；

【摘要】 本文研究了2．5D针刺C/C扩张段试车前、后的热力学性能。采用倒钩针接力针刺制备预制体,针刺密度是影响预制体性能的关键参数。采用化学气相沉积等工艺致密针刺扩张段到理想密度,产品层间强度≥10MPa。制备的针刺C/C扩张段已成功通过多种型号地面热试车和水下试车考核,表明研制的针刺C/C扩张段完全能够满足火箭发动机使用要求。更多还原

【Abstract】 In the paper the needling 2.5D C/C composites divergent section property of the before and after thermal test has been studied. Using the special needle to prepare the preform, and the needle density is one of the important parameters to the preform property. The needle divergent section has been densified to the ideal density by CVI, and the divergent section’s inter layer shear strength is higher or equal to 10 MPa. The needling C/C composites divergent section has undergone a few kinds rotor’s ground tests and underwater tests. which shows the needling C/C composites divergent section can make satisfied with the need of rocket motor completely.更多还原