摘要
采用喷雾技术,通过VARTM工艺制备了微米Al2O3层间增韧环氧树脂/碳纤维复合材料,研究了微米Al2O3面密度对改性复合材料II型层间断裂韧性的影响,并进一步分析了改性对复合材料弯曲、冲击等性能的影响。研究结果表明,微米Al2O3的加入明显改善了复合材料的II型层间断裂韧性,当面密度为15 g/m2时,改性效果最好,II型层间断裂韧性由348 J/m2增加至522 J/m2,其增韧机理与裂纹的偏移、大量微裂纹的形成、Al2O3粒子从基体中拔出及与基体脱粘等现象有关。此外,改性复合材料的冲击性能得到了较好的改善,弯曲性能则稍有提高。
The interlayer-toughed epoxy/carbon fiber composites with micron-Al2O3 were made through vacuum assisted resin transfer molding（VARTM） using spray technology. The mode II interlaminar fracture toughness,bending and impact properties of the composites with different micron-Al2O3 surface density were investigated. The results indicate that the best fracture toughness property can be obtained when the surface density of micro-Al2O3 is 15 g/m2,and the mode II interlaminar fracture toughness of the modified composites is significantly improved from 348 J/m2 to 522 J/m2. The toughening mechanism is related to crack deflection,formation of large number of micro cracks,micron-Al2O3 pulling out and debonding from the matrix. In addition,the impact properties of the modified composites is also significantly improved while the bending properties have a slight increase.
出处
《工程塑料应用》
CAS
CSCD
北大核心
2015年第2期30-34,共5页
Engineering Plastics Application
