几种喉衬材料断裂韧性的比较  

THE FRACTURE TOUGHNESS OF SEVERAL ROCKET NOZZLE THROAT MATERIALS

作　　者：冉宏星[1] 崔红[1] 郝志彪[1] 李瑞珍[1] 周绍建[1] 张祎[1] 苏君明[1] 

机构地区：[1]中国航天科技集团四院四十三所,陕西西安710025

出　　处：《新型炭材料》2002年第1期30-35,共6页New Carbon Materials

摘　　要：测试了几种石墨、毡基C C、多维编织C C及石墨渗铜材料的断裂韧性 ,定性地比较了它们之间的抗断裂能力 ,并对材料的微观结构和断裂机理作了简要的分析。石墨渗铜材料的断裂韧性与高强石墨相比基本相当 ,主要是由于铜相与石墨结合强度低而未能发挥铜相增韧的作用。毡基C C材料的断裂韧性明显优于石墨渗铜材料和石墨 ,以两种不同基体炭为基体的毡基C C的KIC值基本相同。多维编织CThe fracture toughness of several rocket nozzle throat materials was investigated at room temperature. Their fracture microstructure and fracture mechanism were also qualitatively analyzed. The results indicate that, the fracture toughness of copper impregnated graphite is not much greater than that of graphite at room temperature, because the liquid copper does not wet the graphite. The two kinds of integral C/C felt have almost the same fracture toughness though they have a different matrix carbon. The content and distribution of the carbon fiber in the multi-directional woven C/C are related to the mechanical properties of the materials.

关 键 词：断裂韧性 石墨 石墨渗铜 碳/碳复合材料 固体火箭发动机 喉衬材料 

分 类 号：V25[一般工业技术—材料科学与工程]