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

Abstract:

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 inthis paper.The results showed that needling SiO_2f/SiO₂ 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,bending strength was 52.2MPa. Dielectric contant was less than 3.05 and dielectric loss was less than 8×10^-3.

• Periodical: Advanced Materials Research (Volume 833)
• Pages: 146-149
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.833.146
• Online since: November 2013
• Authors: Qi Hong Wei*, Chong Hai Wang, Hong Sheng Wang, Ling Li, Chang Tao Shao, Bo Dong
• Keywords: Dielectric Property, Mechanical Property, Needling, Silica Fiber Reinforced Silica Composites, Thermophysical Properties

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