不同针刺预制体结构对C/C复合材料力学性能的影响  

Effect of Needled Preform Structure on Mechanical Properties of C/C Composite

作　　者：郑蕊[1,2] 徐征[1] 李旭嘉[3] 嵇阿琳[1,2] 李崇俊 

机构地区：[1]西安航天复合材料研究所,西安710025 [2]高性能碳纤维制造及应用国家地方联合工程研究中心,西安710089 [3]重庆理工大学,重庆400054

出　　处：《宇航材料工艺》2012年第5期26-29,共4页Aerospace Materials & Technology

摘　　要：在斜纹碳布/碳纤维网胎、无纬布正交/碳纤维网胎针刺圆筒预制体的基础上,通过在其结构中增加角度缠绕连续纤维,设计和研制了新型结构针刺预制体,并对比研究了不同针刺预制体结构对圆筒C/C复合材料力学性能的影响。结果表明,无纬布正交铺层针刺C/C复合材料的层剪、轴向拉伸强度都高于斜纹碳布增强针刺C/C材料,其中轴向拉伸强度达到157.0 MPa,提高了83.0%;其层剪、轴向拉伸强度均有所提高,其最大分别可达到11.68和179.0 MPa,分别提高了22.6%和14%。A new needled cylindrical preform was designed and fabricated in this paper by means of angle plies of continuous wound carbon fibers with a twill fabric and non-woven tapes needled preform as basements. The effects of needled preform structures on the mechanical properties of C/C composites were compared and investigated. The results show that the orthogonal needled C/C composite with the non-woven tapes has higher interlaminar shear strength（ ILSS）, and a higher axial tensile strength of 157.0 MPa, being 83.0% higher than that of the twill fabric reinforced. The non-woven tapes reinforced cylindrical C/C composites with different angles have improved ILSS and axial tensile properties, the maximum ILSS and axial tensile strength reach 11.68 MPa and 179.0 MPa respectively, being 22.6% and 14% ,respectively,higher than that of the orthogonal C/C composite.

关 键 词：针刺预制体 C/C复合材料 层剪强度 拉伸性能 

分 类 号：TB332[一般工业技术—材料科学与工程]