针刺+缝合预制体C/C复合材料的制备及性能研究  

Study on preparation and performance of new thickwalled preforms

作　　者：张小龙 郭若含 李钊 ZHANG Xiao-long;GUO Ruo-han;LI Zhao(The 8th Xi'an Military Representative Office of Air Force Equipment Department,Xi'an 710025,China;Xi'an Aerospace Composites Research Institute,Xian 710025,China)

机构地区：[1]空军装备部驻西安地区第八军事代表室,西安710025 [2]西安航天复合材料研究所,西安710025

出　　处：《炭素》2022年第3期10-14,20,共6页Carbon

摘　　要：以无纬布/碳纤维网胎为原料,采用针刺+接力缝合的工艺流程制备预制增强体,并经化学气相渗透(CVI)联合沥青浸渍/高压碳化(HPIC)方法得到新型厚壁C/C复合材料。对该材料进行了力学和热物理性能测试,并观测其微观断口形貌。结果表明:此预制体制备方法能够突破传统缝合材料在厚度方向上的尺寸限制,工艺过程简便,不易变形且利于致密。所得C/C材料厚度方向的纤维密度较高,具有优异的机械和良好的热物理性能,能够满足固体火箭发动机等极端环境下的应用需求。Prefabricated reinforcements were prepared using a non-weft cloth/carbon fiber mesh tire using the process of needle punching and relay stitching,and a new thick-walled C/C composite material was obtained by chemical meteorological infiltration combined with asphalt impregnation/high-pressure carbonization.The mechanical and thermophysical properties of the material were tested,and the microscopic fracture morphology was observed.The results show that the preparation method of the perform can break through the size limitation of traditional tufting materials in the thickness direction,the process is simple,not easy to deform and is conductive to compaction.The resulting C/C material has a high fiber density in the thickness direction,has excellent mechanical and good thermal physical properties,and can meet the application requirements of extreme environments such as solid rocket motors.

关 键 词：厚壁缝合预制体 热力学性能 C/C复合材料 

分 类 号：TB332[一般工业技术—材料科学与工程]