摘要
为了研究铝/氢化钛/聚四氟乙烯(Al/TiH_2/PTFE)反应材料的力学性能和反应特性,采用冷等静压和真空烧结工艺制备了四种不同TiH_2含量(0%,5%,10%,20%)的试件,同时制备了不含活性Al颗粒的TiH_2/PTFE试件作为对比组,对所有试件开展了准静态压缩实验。得到了不同TiH_2含量下试件的应力应变曲线及反应率数据,并记录下了试件的反应现象。对反应残渣进行了X射线衍射(XRD)物相分析,讨论了材料的反应机理。结果表明,TiH_2含量对材料性能和反应率影响显著,当TiH_2含量为5%时,反应率达到90%,材料强度达到最大值108MPa,比Al/PTFE类材料强度高15.1%;在TiH_2和Al含量相同时,TiH_2颗粒对PTFE基体增强作用大于Al颗粒;与Al/PTFE相比,含TiH_2的试件反应时出现了特殊的燃烧火苗现象,且该现象随TiH_2含量增加逐渐明显;材料断裂尖端高温引发Al与PTFE反应,使TiH_2活化,释放出氢,生成Ti C,能量释放充分,达到其作为高能添加剂的目的。
To study the mechanical properties and reaction characteristics of aluminum/titanium hydride/polytetrafluoroethylene（Al/TiH2/PTFE）reaction materials,four kinds of specimens with different content of TiH2（0%,5%,10%,20%）were prepared by cold isostatic pressing and vacuum sintering process. At the same time,TiH2/PTFE specimens without active Al particles were also prepared as the control group,then all the specimens were subjected to quasi-static compression experiments.The stress-strain curves and the reaction rate data of the specimens with different TiH2 content were obtained,and the reaction phenomena of the specimens were recorded. Moreover,the phase analyses of reaction residues were performed by XRD and the reaction mechanism of the materials was discussed. Results show that the content of TiH2 has a significant effect on the material properties and the reaction rate. When the content of TiH2 is 5%,the reaction rate is 90% and the material strength reaches the maximum value of 108 MPa,which is 15.1% higher than that of Al/PTFE type material. When the content of TiH2 and Al is the same,the reinforcing effect of TiH2 particles on PTFE matrix is greater than that of Al particles. Compared with Al/PTFE material,a special combustion flaming phenomenon appears in the reaction of TiH2-containing samples,and the phenomenon gradually is obvious with the increasing of TiH2 content. The high temperature of the crack tip of materials causes the reaction between Al and PTFE,which makes TiH2 activate,hydrogen release and Ti C generate,the energy of TiH2 fully release and the purpose of using as a high-energy additive reach.
作者
于钟深
方向
高振儒
罗先南
吴家祥
张军
李裕春
YU Zhong-shen;FANG Xiang;GAO Zhen-ru;LUO Xian-nan;WU Jia-xiang;ZHANG Jun;LI Yu-chun(Field Engineering Institute,PLA Army Engineering University,Nanjing 210007,China)
出处
《含能材料》
EI
CAS
CSCD
北大核心
2018年第8期720-724,共5页
Chinese Journal of Energetic Materials
基金
国家自然科学基金(51673213)
青年科学基金(51704302)
关键词
反应材料
铝/氢化钛/聚四氟乙烯(Al/TiH2/PTFE)
准静态压缩
力学性能
反应特性
reactive materials
aluminum / titanium hydride / polytetrafluoroethylene （AI/TiH2/PTFE）
quasi-static compression
mechanical properties
reaction characteristics
