A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Structure-reinforced needled preform for carbon/carbon composite material, carbon/carbon composite material and preparation method of carbon/carbon composite material
The invention belongs to the technical field of preform preparation, and particularly relates to a structure-reinforced needled preform for a carbon/carbon composite material, the carbon/carbon composite material and a preparation method of the carbon/carbon composite material. According to the invention, 0-degree carbon fiber non-woven cloth, felt, 45-degree carbon fiber non-woven cloth, felt, -45-degree carbon fiber non-woven cloth, felt and 90-degree carbon fiber non-woven cloth are sequentially adopted to form an alternating laminated structure, after the needled preform obtained by the structure is densified, when the obtained carbon/carbon composite material is stressed, carbon fibers in the 0-degree carbon fiber non-woven cloth at the bottom reach the breaking strength first, after the 0-degree carbon fibers are broken, cracks deflect and extend along an interface when penetrating through the carbon fibers of the 45-degree carbon fiber non-woven cloth and the -45-degree carbon fiber non-woven cloth, the cracks deflect, interlayer layering damage is caused, therefore, the breaking stress is released, longitudinal expansion of stress cracks is relieved, and then the strength and toughness of the carbon/carbon composite material are enhanced.
本发明属于预制体制备技术领域，特别涉及一种碳/碳复合材料用结构增强针刺预制体、碳/碳复合材料及其制备方法。本发明采用0°碳纤维无纬布、网胎、45°碳纤维无纬布、网胎、‑45°碳纤维无纬布、网胎和90°碳纤维无纬布的顺序形成交替层叠结构，该种结构所得的针刺预制体在致密化后，所得的碳/碳复合材料在受到应力时底部0°碳纤维无纬布中的碳纤维最先达到断裂强度，在0°碳纤维断裂后裂纹穿过45°碳纤维无纬布和‑45°碳纤维无纬布的碳纤维时发生偏转并沿界面扩展，发生裂纹偏转，造成层间分层破坏，使得断裂应力得到释放，有利于减缓应力裂纹在纵向的扩展，进而有利于增强碳/碳复合材料的强度和韧性。
Structure-reinforced needled preform for carbon/carbon composite material, carbon/carbon composite material and preparation method of carbon/carbon composite material
The invention belongs to the technical field of preform preparation, and particularly relates to a structure-reinforced needled preform for a carbon/carbon composite material, the carbon/carbon composite material and a preparation method of the carbon/carbon composite material. According to the invention, 0-degree carbon fiber non-woven cloth, felt, 45-degree carbon fiber non-woven cloth, felt, -45-degree carbon fiber non-woven cloth, felt and 90-degree carbon fiber non-woven cloth are sequentially adopted to form an alternating laminated structure, after the needled preform obtained by the structure is densified, when the obtained carbon/carbon composite material is stressed, carbon fibers in the 0-degree carbon fiber non-woven cloth at the bottom reach the breaking strength first, after the 0-degree carbon fibers are broken, cracks deflect and extend along an interface when penetrating through the carbon fibers of the 45-degree carbon fiber non-woven cloth and the -45-degree carbon fiber non-woven cloth, the cracks deflect, interlayer layering damage is caused, therefore, the breaking stress is released, longitudinal expansion of stress cracks is relieved, and then the strength and toughness of the carbon/carbon composite material are enhanced.
本发明属于预制体制备技术领域，特别涉及一种碳/碳复合材料用结构增强针刺预制体、碳/碳复合材料及其制备方法。本发明采用0°碳纤维无纬布、网胎、45°碳纤维无纬布、网胎、‑45°碳纤维无纬布、网胎和90°碳纤维无纬布的顺序形成交替层叠结构，该种结构所得的针刺预制体在致密化后，所得的碳/碳复合材料在受到应力时底部0°碳纤维无纬布中的碳纤维最先达到断裂强度，在0°碳纤维断裂后裂纹穿过45°碳纤维无纬布和‑45°碳纤维无纬布的碳纤维时发生偏转并沿界面扩展，发生裂纹偏转，造成层间分层破坏，使得断裂应力得到释放，有利于减缓应力裂纹在纵向的扩展，进而有利于增强碳/碳复合材料的强度和韧性。
Structure-reinforced needled preform for carbon/carbon composite material, carbon/carbon composite material and preparation method of carbon/carbon composite material
一种碳/碳复合材料用结构增强针刺预制体、碳/碳复合材料及其制备方法
LI AIJUN (author) / MAO SIJIA (author) / JIA LINTAO (author) / WANG MENGQIAN (author) / ZHANG DAN (author)
2021-08-27
Patent
Electronic Resource
Chinese
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