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Study on Process and Properties of Needling Silica Fiber Reinforced Silica Composites

机译：针刺二氧化硅纤维增强二氧化硅复合材料的工艺与性能研究

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With the development of military weapons, the demand of weapons is growing. But now 2.5 D silica fiber reinforced silica composites have long production period, high cost, which limited the production and schedule of weapons. This paper studied low cost manufacturing technology from two aspects of fiber preform weaving mode and molding process. The preforms were prepared with needling process. CT images of needling preform, thermophysical properties and mechanical properties and dielectric properties of needling silica fiber reinforced silica composites were studied in this paper. The results showed that needling SiO_2f/SiO_2 composites had short production period and low cost, which had good mechanical properties. Tensile strength was 20.1MPa, compressive strength of XY direction was 88.3MPa, and bending strength was 52.2MPa. Dielectric constant was less than 3.05 and dielectric loss was less than 8×10~(-3).
机译：随着军事武器的发展，武器的需求正在增长。但现在2.5 D二氧化硅纤维增强二氧化硅复合材料长期生产期，高成本，有限于武器的生产和时间表。本文研究了纤维预制件编织模式和模塑过程的两个方面的低成本制造技术。预制件用针刺方法制备。本文研究了针刺预成型件，热物理性能和针刺硅纤维增强二氧化硅复合材料的热理性质和力学性能。结果表明，针刺SiO_2F / SiO_2复合材料的生产期短，成本低，机械性能良好。拉伸强度为20.1MPa，XY方向的抗压强度为88.3MPa，弯曲强度为52.2MPa。介电常数小于3.05，介电损耗小于8×10〜（-3）。

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