Wu Jiaxiang, Huang Junyi, Liu Qiang, Chen Yong, Li Yuchun, Yang Li, Yin Qin, Gao Zhenru, Wu Shuangzhang, Ren Xinxin
College of Field Engineering, Army Engineering University of PLA Nanjing 210007 China
RSC Adv. 2020 Jan 8;10(3):1447-1455. doi: 10.1039/c9ra09291a. eCollection 2020 Jan 7.
To investigate the influence of SiC and AlO as additives on the mechanical response and reactive properties of Al/PTFE (aluminum/polytetrafluoroethylene) reactive composites, Al/SiC/PTFE and Al/AlO/PTFE samples with different component ratios were prepared for quasi-static compression and drop-weight tests. Al/AlO/PTFE samples with different particle sizes were prepared for simultaneous thermal analysis experiments. The stress-strain data, characteristic drop height and thermogravimetry-differential scanning calorimetry (TG-DSC) curves of the composites were recorded. The results show that the addition of SiC and AlO significantly enhance the strength of Al/PTFE. The enhancing effect of SiC on the composite strength was stronger than that of AlO. The addition of SiC and AlO contribute toward reducing the sensitivity of the composites, where the reducing effect of AlO on Al/PTFE sensitivity was weaker than that of SiC. Nanoscale AlO reacts with PTFE to form AlF, and the reaction heat decreases dramatically with an increase in the AlO particle size. The addition of nanoscale AlO improves the reaction heat and energy density of the composites.
为研究碳化硅（SiC）和氧化铝（AlO）作为添加剂对铝/聚四氟乙烯（Al/PTFE）反应性复合材料力学响应和反应性能的影响，制备了不同组分比例的Al/SiC/PTFE和Al/AlO/PTFE样品用于准静态压缩和落锤试验。制备了不同粒径的Al/AlO/PTFE样品用于同步热分析实验。记录了复合材料的应力-应变数据、特征落高以及热重-差示扫描量热法（TG-DSC）曲线。结果表明，SiC和AlO的添加显著提高了Al/PTFE的强度。SiC对复合材料强度的增强作用强于AlO。SiC和AlO的添加有助于降低复合材料的敏感度，其中AlO对Al/PTFE敏感度的降低作用弱于SiC。纳米级AlO与PTFE反应生成AlF，且反应热随AlO粒径的增加而急剧降低。纳米级AlO的添加提高了复合材料的反应热和能量密度。
