基于可瓷化填料的玄武岩纤维增强硼酚醛树脂复合材料高温性能研究OA

To improve the high-temperature resilience of basalt fiber composite materials,this study utilized the prepreg molding technique to manufacture basalt fiber-reinforced boron-phenolic resin compos-ites incorporating ceramicizable fillers.The thermal stability,dynamic mechanical properties,and high-tem-perature mechanical performance of the composites were evaluated through TG testing,DMA analysis,high-temperature mechanical testing,and scanning electron microscopy.The outcomes indicate a substan-tial enhancement in the high-temperature resistance of the composite materials with an increase in ceram-icizable filler content.Specifically,at 50%filler content,the temperature corresponding to 5%weight loss(T5%)of the composite material rises by 41℃,while peak decomposition temperature(Tmax)increases by 12℃compared to the filler-free composite.Furthermore,the carbon residue rate at 1 000℃escalates by 19.0%,reaching 77.6%.At room temperature,as the content of the filler increases,the bending strength of the composite material shows a trend of increasing first and then decreasing.After being treated at 300,400,and 600℃,when the addition amount is 40%,the maximum value is reached,and the bending strengths are 356,217,and 68.2 MPa respectively,with the strength retention rates being 89.2%,54.4%,and 17.1%re-spectively.DMA analysis unveiled a trend in the storage modulus of the composite material,showing an initial increase followed by a decrease.Concurrently,the glass transition temperature(Tg)rises with the in-corporation of ceramicizable fillers.Specifically,at a 50%filler addition,the Tg temperature escalates by 49℃compared to the composite lacking ceramicizable fillers.