预制体结构对C/C喷管出口锥材料力学性能的影响  

Effects of preform structure on mechanical properties of carbon-carbon composite for nozzle exit cone

作　　者：张晓虎[1] 李贺军[1] 郝志彪[2] 崔红[2] 嵇阿琳[2] 

机构地区：[1]西北工业大学材料学院,西安710072 [2]西安航天复合材料研究所,西安710025

出　　处：《固体火箭技术》2006年第5期380-383,共4页Journal of Solid Rocket Technology

基　　金：国家863项目(2005AA724061);国家杰出青年科学基金项目(50372050)

摘　　要：设计了3种用于制备喷管用C/C出口锥材料的炭纤维增强预制体,即炭布铺层骨架(P型预制体)、炭布叠层原位针刺骨架(N型预制体)、炭纤维整体编织骨架(B型预制体),并对比研究了预制体结构对C/C出口锥材料力学性能的影响。结果表明,对同密度水平的C/C出口锥,用P型预制体制备的C/C材料的层剪强度最低,N型预制体制备的材料的层剪强度最高,B型预制体制备的材料的层剪强度居中。3种预制体制备的C/C材料的高温弯曲性能差别不大,N型预制体结构更适合于C/C出口锥材料的制备成型。Three types of carbon fiber reinforced preforms such as carbon cloth ply preform （ P preform） , needled caborn cloth preform（ N preform）and braided carbon fiber preform（ B preform）were designed to prepare carbon-carbon exit cone of nozzle,and the effects of the preform structures on the mechanical properties of carbon-carbon composite were compared and investigated. The results show that for same density C/C exit cone composite, interlaminar shear strength（ILSS） of C/C composite prepared by P preform has the lowest value,but ILSS of C/C composite prepared by N preform reaches the highest value. The high-temperature bending properties of C/C composite prepared by three types of preforms are almost the same, and N preform structure is more appropriate for preparation and forming of C/C exit cone composite.

关 键 词：C/C复合材料 预制体结构 喷管出口锥 力学性能 

分 类 号：TB332[一般工业技术—材料科学与工程]