六钛酸钾晶须改性环氧有机硅树脂的抗烧蚀性能  

Ablation resistance of potassium hexafluorotitanate whisker-modified epoxy silicone resin

作　　者：李轩 周德东 何瑜 张立京 苏菁[2] 李伟 肖魁 孟卫钢 LI Xuan;ZHOU Dedong;HE Yu;ZHANG Lijing;SU Jing;LI Wei;XIAO Kui;MENG Weigang(College of Mechanical Engineering,Sichuan University of Science&Engineering,Zigong 643000,China;Xi’an Chang-feng Electromechanical Research Institute,Xi’an 710065,China;Wuhan Iron and Steel Co.,Ltd.,Wuhan 430080,China)

机构地区：[1]四川轻化工大学机械工程学院,自贡643000 [2]西安长峰机电研究所,西安710065 [3]武汉钢铁有限公司,武汉430080

出　　处：《复合材料科学与工程》2024年第5期30-35,共6页Composites Science and Engineering

基　　金：四川省科技计划项目(2023YFG0239);宜宾市科技局项目(2021GY006)。

摘　　要：制备了六钛酸钾晶须(PHW)改性的环氧有机硅树脂复合材料,研究了PHW含量对复合材料在氧-乙炔烧蚀环境中抗烧蚀性能的影响。结果表明:添加PHW能够有效提高环氧有机硅树脂烧蚀产物层的抗剥落能力和耐高温烧蚀性能,其中PHW添加量为20wt%时,复合材料的线烧蚀率和质量烧蚀率均最低,分别为0.136 mm/s和1.143 g/s,与环氧有机硅树脂相比分别低约53.74%和47.04%;当PHW含量超过20wt%后,进一步增加其含量对复合材料耐烧蚀性能的改善效果不再明显。TG分析结果表明:添加PHW能大幅降低环氧有机硅树脂的失重率,其中PHW添加量为20wt%时,复合材料的失重率约为38.57%,较环氧有机硅树脂低约19.89%;当PHW含量高于20wt%后,进一步增加其在复合材料中的含量对失重率的改善效果不再明显。The epoxy-silicone resin composites modified with potassium hexafluorotitanate whiskers(PHW) were prepared,and their oxygen-acetylene ablation performance was investigated,focusing on the impact of varying PHW content.The results indicate that addition of PHW can effectively enhance the anti-spalling capability and high-temperature ablation resistance of the epoxy organosilicon resin.When the PHW concentration is 20wt%,the composite material exhibits the lowest linear ablation rate and mass ablation rate,which are 0.136 mm/s and 1.143 g/s,respectively.These values are approximately 53.74% and 47.04% lower than those of the epoxy organosilicon resin alone.However,when the PHW content exceeds 20wt%,further increasing its amount is no longer significantly improving the ablation resistance of the composite material.Thermal gravimetric analysis(TGA) results reveal that the addition of PHW significantly decreases the weight loss rate of the epoxy-silicone resin.Specifically,when the PHW content is 20wt%,the weight loss rate of the composite material is approximately 38.57%,which is roughly 19.89% lower than that of the epoxy-silicone resin.Beyond a PHW content of 20wt%,further increases in its concentration within the composite material no longer yield a significant improvement in weight loss rate.

关 键 词：六钛酸钾晶须 环氧有机硅树脂 烧蚀 复合材料 

分 类 号：TB332[一般工业技术—材料科学与工程]