铝粉/聚四氟乙烯机械活化含能材料的制备及其微观性能研究

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铝粉/聚四氟乙烯机械活化含能材料的制备及其微观性能研究   

Preparation and Microstructure of Aluminum Powder/PolytetrafluoroethyleneMechanical Activated Energetic Composites

作　　者：陶俊[1] 王晓峰[1] 韩仲熙[1] 冯博[1] 南海[1] 谢中元[1] 黄亚峰[1]

机构地区：[1]西安近代化学研究所,西安710065

出　　处：《材料导报》2018年第6期894-898,共5页
Materials Review

基　　金：国家自然科学基金(11502194)

摘　　要：为了研究铝粉/聚四氟乙烯机械活化含能材料的微观性能,利用自制高能球磨机制备了不同球磨时间的机械活化含能材料,利用场发射扫描电镜分析了机械活化含能材料的微观形貌及表面元素分布,利用X射线衍射仪和红外光谱仪表征了材料的物相结构和化学结构。进一步利用分子动力学手段研究了铝粉的不同晶面与聚四氟乙烯的相互作用。结果表明,在长时间的强机械能作用下,聚四氟乙烯和铝粉紧密接触在一起,形成直径为100μm左右的薄片状复合物;球磨20 min以后,铝粉和聚四氟乙烯分散得较为均匀,但离完全均匀分散还有一定差距;高能球磨仅能引起铝粉/聚四氟乙烯复合材料微观物理结构的变化;分子动力学计算显示,铝粉的不同晶面与聚四氟乙烯相互作用的过程中,范德华力占主导地位。
In order to study the properties of aluminum powder/polytetrafluoroethylene(Al/PTFE)mechanical activated energetic composites(MAECs),MAECs were prepared by high energy ball milling with different milling time.The micro morphology and surface element distribution of MAECs were analyzed.The phase structure and chemical structure of the materials were also characterized.Then the interaction between PTFE and different crystal surfaces of Al was studied by molecular dynamics.Research results showed that PTFE contact closely with Al to form a thin sheet with diameter of about 100μm after a long period of strong mechanical energy.With ball milling more than 20 min,Al and PTFE dispersed uniformly,but there was a certain gap with the absolute dispersion.High energy ball milling brings only a change in the microstructure of Al/PTFE composites.The interaction between PTFE and different crystal surfaces of Al were dominated by Van der Waals’force.

关 键 词：机械活化含能材料 铝粉 聚四氟乙烯(PTFE) 球磨 微观性能

分 类 号：TJ55[兵器科学与技术—军事化学与烟火技术]