摘要
以硼酚醛树脂为基体,石英纤维为增强体,氧化硅、石墨及云母为陶瓷填料制备了可瓷化复合材料。通过1400℃下烧结前后材料的力学性能测试、氧-乙炔焰(2100℃)烧蚀性能测试,扫描电镜、热重分析及X射线衍射分析研究了不同含量陶瓷填料对石英纤维增强可瓷化硼酚醛树脂复合材料性能的影响。结果表明,常温下石英纤维增强可瓷化硼酚醛树脂复合材料的弯曲强度随着陶瓷填料含量的增加呈先升高后降低的趋势,最高可达到220.62 MPa,经过1400℃马弗炉烧蚀后,弯曲强度最高可达19.10 MPa。随着陶瓷填料含量的增加,复合材料的耐烧蚀性能提高,质量烧蚀率和线烧蚀率最低可分别达到0.050g/s和0.0187mm/s。陶瓷填料经1400℃高温处理后在一定程度下可生成SiC,使材料转变为含碳化硅的陶瓷基复合材料,提高了复合材料的弯曲强度、耐烧蚀性和耐高温性。与通常碳化硅陶瓷复合材料相比,该制备工艺简单,可大规模生产,实现了陶瓷基复合材料的低成本化。
The ceramizable composites were prepared using boron phenolic resin as the matrix,quartz fibers as the reinforcement,and silicon oxide,graphite,and mica as the ceramic filler.The effect of ceramic filler content on the properties of quartz fiber reinforced ceramizable boron phenolic composite were investigated by the mechanical property tests of the materials before and after sintering at 1400℃,ablation performance test of the oxyacetylene flame(2100 ℃),scanning electron microscope,thermogravimetric analysis and X-ray diffraction analysis.The results showed that at room temperature,the flexural strength of the quartz fiber-reinforced ceramizable boron phenolic resin composite material was firstly increased and then decreased with the increase of ceramic filler content and could reach a maximum of 220.62 MPa.After ablation at 1400 ℃ in muffle furnace,the flexural strength could reach up to 19.10 MPa.With the increase of ceramic filler content,the ablation resistance of composites was improved,and the minimum mass ablation rate and linear ablation rate could reach 0.050 g/s and 0.0187 mm/s,respectively.The ceramic filler could generate SiC to a certain extent after high-temperature treatment at 1400 ℃,which transformed the material into a ceramic matrix composite containing silicon carbide,which improved the flexural strength,ablation resistance and high temperature resistance of the composite.Compared with ordinary silicon carbide ceramic composite,the preparation process was simple and could be produced on a large scale,thereby realizing the low cost of ceramic matrix composites.
作者
孟馨玥
何昕
秦岩
邹镇岳
傅华东
MENG Xin-yue;HE Xin;QIN Yan;ZOU Zhen-yue;FU Hua-dong(School of Materials Science and Engineering,Wuhan University of Technology,Wuhan 430063,China)
出处
《热固性树脂》
CAS
CSCD
北大核心
2020年第3期10-14,19,共6页
Thermosetting Resin
关键词
可瓷化
硼酚醛树脂
高温烧蚀
碳化硅
复合材料
弯曲强度
低成本
ceramization
boron phenolic resin
high temperature ablation
silicon carbide
composite
flexural strength
low cost
