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通过超声辅助-料浆浸渍工艺制备单向碳纤维强韧不同硅铝比铝硅酸盐聚合物(Si/Al=2,2.5,3,3.5和4)复合材料,研究硅铝比对铝硅酸盐聚合物和复合材料力学性能和断裂行为的影响。结果表明,复合材料中碳纤维能够被充分浸渍并且复合材料具有均匀的组织结构。随Si/Al的提高,铝硅酸盐聚合物和复合材料的弯曲强度和弹性模量均逐渐增加,但是复合材料的断裂功首先增加,并在Si/Al=3时达到峰值,然后逐渐降低。所有的复合材料均表现出非灾难性断裂行为,并且Si/Al<3的复合材料以剪切断裂模式为主,而Si/Al>3的复合材料呈现弯曲断裂模式。在Si/Al≥3的复合材料中能够观测到大量的纤维拔出,表明碳纤维显著的强韧作用。
The strength and toughness of different Si-Al to Al-silicate polymers (Si / Al = 2, 2.5, 3, 3.5 and 4) composites were prepared by ultrasonic assisted slurry impregnation process, Effect of Salt Polymer and Composites on Mechanical Properties and Fracture Behavior. The results show that the carbon fiber in the composite material can be fully impregnated and the composite material has a uniform structure. With the increase of Si / Al, the flexural strength and elastic modulus of the aluminosilicate polymers and composites increase gradually, but the work of fracture of the composites increases first and reaches the peak at Si / Al = 3, and then decreases gradually . All the composites showed non-catastrophic fracture behavior, and the composites with Si / Al <3 were mainly in the shear fracture mode, while the Si / Al> 3 composites showed the bending fracture mode. In Si / Al ≧ 3 composite material can be observed in a large number of fiber pull out, indicating a significant carbon fiber toughness.