摘要
采用RTM工艺制备了四种不同纤维体积含量的石英纤维增强环氧树脂基复合材料层板。研究了温度、吸湿、频率、纤维体积分数和后固化等因素对该复合材料体系介电性能的影响。结果表明,在30～150℃温度范围内,QW220/5284RTM复合材料的介电常数和介电损耗均随温度升高而增大;纤维体积分数为53%时,该复合材料体系的饱和吸湿率较低,约为0.44%,吸水后,介电常数和介电损耗都有一定程度的增加;室温下,7～18GHz频率范围内,该复合材料体系的介电常数和介电损耗随频率改变没有表现出明显和规律的变化;该复合材料体系的介电常数和介电损耗随着纤维体积分数的提高而分别增大和减小;后固化使该复合材料体系的介电常数和介电损耗均减小。QW220/5284RTM复合材料具有良好的介电性能,且介电性能具有较好的耐环境特性,可用于飞机透波结构。
Quartz fiber reinforced epoxy resin QW220 /5284 RTM composite laminates with four different fiber volume fractions were fabricated via RTM process. The relationship between dielectric properties of the composites and temperature,moisture absorption,frequency,fiber volume fraction of composites and post cure were investigated. The results showed that within the temperature range of 30 to 150℃,dielectric constant and dielectric loss of QW220 / 5284 RTM composites increased with increasing temperature. When fiber volume fraction of the composite was 53%,saturated moisture absorption rate of the composite was about 0.44%,and dielectric constant and dielectric loss of the composites increased after moisture absorption. At room temperature, dielectric constant and dielectric loss of the composites did not show any obvious and regular changes with frequency changing from 7 to 18 GHz. Dielectric constant and dielectric loss of the composites respectively increased and decreased with increasing fiber content. Dielectric constant and dielectric loss of the composites decreased after post curing. QW220 / 5284 RTM composite has good dielectric properties which has good environmental characteristics,and can be used for aircraft wave-transparent structure.
出处
《玻璃钢／复合材料》
CAS
CSCD
北大核心
2016年第4期45-50,共6页
Fiber Reinforced Plastics/Composites
作者简介
何先成（1985-），男，硕士，工程师，主要从事树脂基复合材料研究。
