CAJ | 학술논문

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。
채용분무기술，통과VARTM공예제비료미미Al2O3층간증인배양수지／탄섬유복합재료，연구료미미Al2O3면밀도대개성복합재료II형층간단렬인성적영향，병진일보분석료개성대복합재료만곡、충격등성능적영향。연구결과표명，미미Al2O3적가입명현개선료복합재료적II형층간단렬인성，당면밀도위15 g／m2시，개성효과최호， II형층간단렬인성유348 J／m2증가지522 J／m2，기증인궤리여렬문적편이、대량미렬문적형성、Al2O3입자종기체중발출급여기체탈점등현상유관。차외，개성복합재료적충격성능득도료교호적개선，만곡성능칙초유제고。
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.