Al粒径对富铝聚四氟乙烯基铝活性材料冲击反应性能的影响

doi:10.3969/j.issn.1000-1093.2022.01.006

摘要/Abstract

摘要： 为研究Al粒径对50%∶50%质量比的富铝聚四氟乙烯基铝(PTFE/Al)活性材料在中高应变率下的冲击反应行为的影响，采用模压烧结成型法制备了50 nm、10 μm、70 μm、200 μm 4种 Al粒径的PTFE/Al活性材料试件。基于分离式霍普金森压杆(SHPB)实验，利用高速摄像机拍摄不同应变率加载下PTFE/Al活性材料的冲击反应过程，分析Al粒径对PTFE/Al活性材料的冲击反应特性影响。实验结果表明:随着Al粒径从50 nm增加到10 μm，反应延迟时间增加可达40%，反应持续时间降低可达17%，同时PTFE/Al活性材料参与反应的量逐渐减少，反应激烈程度和能量释放不断降低，反应难以持续进行;当Al粒径增加到70 μm时，难以在SHPB加载下发生反应;加载应变率对PTFE/Al活性材料的反应性能也有较大的影响，PTFE/Al活性材料的反应延迟时间随着加载应变率的提高而降低;加载应变率和Al粒径对PTFE/Al活性材料的冲击反应扩散、反应速率、反应程度均有较大影响，可通过调节Al粒径来调节其冲击反应性能。

关键词: 聚四氟乙烯基铝活性材料, Al粒径, 分离式霍普金森压杆, 冲击反应

Abstract: The effect of Al particle size on the shock-induced reaction characteristics of PTFE/Al reactive material with a mass ratio of 50∶50 is investigated. 4 kinds of PTFE/Al reactive material specimens with different Al particle sizes were prepared by molding and sintering. The reactive material specimens were tested by using split-Hopkinson pressure bar (SHPB), and the shock-induced reaction processes of PTFE/Al reactive material at different strain rates were recorded with a high-speed camera. The results show that, as the Al particle size increases from 50 nm to 10 μm, the reaction delay rises up to 40% and the reaction duration decreases up to 17%, while the amount of reactive material participating in the reaction decreases, and the reaction intensity and energy release decrease. When the Al particle size increases to 70 μm, it is difficult to ignite under SHPB loading. The strain rate also greatly influences the reactive characteristics of reactive material,and the reaction delay of PTFE/Al reactive material decreases with the increase in the loading strain rate. The results show that Al particle size greatly influences the impact reaction diffusion, reaction speed, and extent of reaction of PTFE/Al reactive material, and its impact reaction property can be adjusted by adjusting Al particle size.

Key words: PTFE/Alreactivematerial, Alparticlesize, split-Hopkinsonpressurebar, shock-inducedreaction

中图分类号:

TJ410.4

胡榕，姜春兰，毛亮，祁宇轩，蔡尚晔，胡万翔. Al粒径对富铝聚四氟乙烯基铝活性材料冲击反应性能的影响[J]. 兵工学报, 2022, 43(1): 48-56.

HU Rong, JIANG Chunlan, MAO Liang, QI Yuxuan, CAI Shangye, HU Wanxiang. Effect of Al Particle Size on the Shock-induced Reaction Characteristics of Al-rich PTFE/Al Composites[J]. Acta Armamentarii, 2022, 43(1): 48-56.

参考文献

［1］ KOCH E C. Metal-fluorocarbon based energetic materials[M]. Weinheim, Germany: Wiley-VCH Verlag Gmbh & Co. KGaA, 2012:6-17.
[2］陶俊,王晓峰.金属-氟聚物机械活化含能材料的研究进展[J].火炸药学报,2017,40(5):8-14.
TAO J, WANG X F. Research progress in metal-fluoropolymer mechanical activation energetic composites[J]. Chinese Journal of Explosives & Propellants, 2017, 40(5): 8-14. (in Chinese)
[3］张先锋,赵晓宁.多功能含能结构材料研究进展[J].含能材料,2009,17(6):731-739.
ZHANG X F, ZHAO X N. Review on multifunctional energetic structural materials[J]. Chinese Journal of Energetic Materials,2009, 17(6): 731-739. (in Chinese)
[4］ JOSHI V S. Process for making polytetrafluoroethylene-aluminum composite and product made：US6547993 [P].2003-04-15.
[5］ NIELSON D B, TRUITT R M, ASHCROFT B N. Reactive material enhanced projectiles and related methods：US2008035007 [P]. 2008-02-14.
[6］ NIELSON D B, TANNER R L, LUND G K. High strength reactive materials: US20030096897A1 [P]. 2003-05-22.
[7］ OSBORNE D T, PANTOYA M L. Effect of Al particle size on the thermal degradation of Al/Teflon mixtures[J]. Combustion Science & Technology, 2007, 179(8):1467-1480.
[8］ MOCK W, DROTAR J T. Effect of aluminum particle size on the impact initiation of pressed PTFE-Al composite rods[J].AIP Conference Proceedings, 2007, 955: 971-974.
[9］周杰,何勇,何源,等.Al/PTFE/W反应材料的准静态压缩性能与冲击释能特性[J].含能材料,2017,25(11):903-912.
ZHOU J, HE Y, HE Y, et al. Quasi-static compression properties and impact energy release characteristics of Al/PTFE/W reactive materials[J]. Chinese Journal of Energetic Materials, 2017,25(11): 903-912. (in Chinese)
[10］周杰. 典型氟聚物基活性材料冲击反应特性研究[D].南京理工大学,2018.
ZHOU J. Study on the impact-induced reaction characteristics of typical fluoropolymer-matrix reactive materials[D]. Nanjing: Nanjing University of Science & Technology, 2018. (in Chinese)
[11］ FENG B, FANG X, LI Y C, et al. An initiation phenomenon of Al-PTFE under quasi-static compression[J]. Chemical Physics Letters, 2015, 637:38-41.
[12］ FENG B, FANG X, LI Y C, et al. Reactions of Al-PTFE under impact and quasi-static compression[J]. Advances in Materials Science & Engineering, 2015,2015: 582320.
[13］ FENG B, LI Y C, HAO H, et al. A mechanism of hot-spots formation at the crack tip of Al-PTFE under quasi-static compression[J]. Propellants, Explosives, Pyrotechnics, 2017, 42(12): 1366-1372.
[14］ TANG L, GE C, GUO H G, et al. Force chains based mesoscale simulation on the dynamic response of Al-PTFE granular composites[J]. Defence Technology, 2020, 17(1): 56-63.
[15］乌布力艾散麦麦提图尔荪, 葛超, 董永香, 等. 基于Al/PTFE真实细观特性统计模型的宏观力学性能模拟[J].复合材料学报, 2016, 33(11): 2528-2536.
MAIMAITITUERSUN W, GE C, DONG Y X, et al. Simulation on mechanical properties of Al/PTFE based on mesoscopic statistical model[J]. Acta Materiae Compositae Sinica, 2016, 33(11): 2528-2536. (in Chinese)
[16］ LAN J, LIU J X, ZHANG S, et al. Influence of multi-oxidants on reaction characteristics of PTFE-Al-X_mO_y reactive material[J]. Materials & Design, 2020, 186: 108325.
[17］ ZHANG X B, LIU J X, WANG L, et al. Effects of Al and W particle size on combustion characteristics and dynamic response of W-PTFE-Al composites[J]. Rare Metal Materials and Engineering, 2018, 47(6): 1723-1728.
[18］李尉, 任会兰, 宁建国, 等. Al/PTFE活性材料的动态力学行为和撞击点火特性[J].含能材料, 2020, 28(1): 38-45.
LI W, REN H L, NING J G, et al. Dynamic mechanical behavior and impact ignition characteristics of Al/PTFE reactive materials[J]. Chinese Journal of Energetic Materials, 2020, 28(1): 38-45. (in Chinese)
[19］卢芳云, 陈荣, 林玉亮, 等. 霍普金森杆实验技术[M]. 北京: 科学出版社, 2013: 30-38.
LU F Y, CHEN R, LIN Y L, et al. Hopkinson bar techniques[M]. Beijing: Science Press, 2013:30-38. (in Chinese)
[20］毛亮,叶胜,胡万翔,等.聚四氟乙烯基铝活性材料的热化学反应特性研究[J].兵工学报, 2020, 41(10): 1962-1969.
MAO L, YE S, HU W X, et al. Thermochemical reaction characteristics of PTFE/Al reactive material[J], Acta Armamentarii, 2020, 41(10): 1962-1969. (in Chinese)
［21］ LWVITAS V I, PANTOYA M L, DIKICI B. Melt dispersion versus diffusive oxidation mechanism for aluminum nanoparticles: critical experiments and controlling parameters［J］. Applied Physics Letters, 2008, 92(1): 064903.
[22］ JIANG C L, CAI S Y, MAO L, et al. Effect of porosity on dynamic mechanical properties and impact response characteristics of high aluminum content PTFE/Al energetic materials[J]. Materials,2019, 13(1): 140-150.

[1]	宁子轩，王琳，程兴旺，程焕武，刘安晋，徐雪峰，周哲，张斌斌. 分离式霍普金森压杆加载下不同组织Ti-6321钛合金的动态响应行为[J]. 兵工学报, 2021, 42(4): 862-870.
[2]	李东伟，苗飞超，张向荣，熊国松，周霖，赵双双. 2，4-二硝基苯甲醚基不敏感熔注炸药动态力学性能[J]. 兵工学报, 2021, 42(11): 2344-2349.
[3]	徐雪峰，王琳，沙彦刚，杨思琪，刘安晋， Tayyeb Ali，张斌斌，赵登辉. TC4 ELI钛合金动态压缩性能及绝热剪切敏感性的研究[J]. 兵工学报, 2020, 41(2): 366-373.
[4]	任会兰，李尉，刘晓俊，陈志优. 钨颗粒增强铝/聚四氟乙烯材料的冲击反应特性[J]. 兵工学报, 2016, 37(5): 872-878.
[5]	苗润，王伟力，宋杨. TC4钛合金动态II型裂纹扩展速度与加载速度的关系研究[J]. 兵工学报, 2016, 37(12): 2331-2339.
[6]	陈鹏，卢芳云，覃金贵，陈荣，陈进，李志斌，蒋邦海. 含钨活性材料动态压缩力学性能[J]. 兵工学报, 2015, 36(10): 1861-1866.
[7]	钱立志，宁全利，李俊，蒋滨安. 基于分离式霍普金森压杆的弹载器件动态特性模拟研究[J]. 兵工学报, 2015, 36(10): 1875-1881.
[8]	孙朝翔, 鞠玉涛, 郑健, 郑亚, 张君发. 改性双基推进剂高低应变率下压缩特性试验研究[J]. 兵工学报, 2013, 34(6): 698-703.
[9]	王鹏1，许金余1,2，刘石1，陈腾飞1. 高温下砂岩动态力学特性研究[J]. 兵工学报, 2013, 34(2): 203-208.
[10]	邹广平，王新征，陈剑杰，唱忠良. 空心锥撞击杆对分离式霍普金森压杆入射脉冲弥散的抑制效果分析[J]. 兵工学报, 2012, 33(11): 1346-1351.
[11]	焦楚杰₁，蒋国平₂，高乐₁. 钢纤维混凝土动态劈裂实验研究[J]. 兵工学报, 2010, 31(4): 469-472.
[12]	王璀轶，王杨卫，于晓东，王全胜，康晓鹏. Al2O3陶瓷分离式霍普金森压杆恒应变率动态压缩试验研究[J]. 兵工学报, 2009, 30(10): 1349-1352.