基于聚焦离子束的微米铝粉界面结构制备和氧化特性研究  

Preparation and Oxidation Characteristics of Micron Aluminum Powder Interface Structure Based on Focused Ion Beam

作　　者：王敬凯 陈捷[2] 刘帅 睢贺良[2] 索志荣[1] 银颖 WANG Jing-kai;CHEN Jie;LIU Shuai;SUI He-liang;SUO Zhi-rong;YIN Ying(School of Materials and Engineering,Southwest University of Science and Technology,Mianyang 621010,China;Institute of Chemical Materials,CAEP,Mianyang 621999,China;College of Sciences,Xi′an Shiyou University,Xi′an 710065,China)

机构地区：[1]西南科技大学材料科学与工程学院,四川绵阳621010 [2]中国工程物理研究院化工材料研究所,四川绵阳621999 [3]西安石油大学理学院,陕西西安710065

出　　处：《含能材料》2021年第10期904-913,共10页Chinese Journal of Energetic Materials

摘　　要：为直观地研究金属铝核/氧化层的界面结构,以聚焦离子束微纳加工技术为基础,成功建立了2~8μm铝粉颗粒的切片方法。对于尺寸2~8μm的铝粉颗粒,可通过结合聚焦离子束(FIB)直接切割与剖面减薄获得切片。所制备的切片样品的界面结构清晰完整,氧化层未被破坏;通过进一步联用扫描电子显微镜、高分辨透射电子显微镜、能谱线扫描及元素面分布等多种表征手段,获得了不同老化条件下铝颗粒“核‐壳”界面的微观结构、结晶性和元素分布等信息。发现铝颗粒表面氧化层中Al和O元素的化学计量比偏离于标准Al2O3,呈现梯度分布特征;定量地获得了铝颗粒氧化层厚度与老化温度之间的正相关关系,未经热老化样品的氧化层厚度约5.4 nm,75℃和95℃老化样品的氧化层厚度分别增加至(34.1±2.1)nm和(51.3±2.2)nm。In order to study the interface structure of aluminum core/oxide layer intuitively,the slicing method of aluminum pow‐ders(2-8μm)were successfully established based on FIB micro and nano processing technology.The slices were obtained by combining FIB direct cutting with profile thinning.The interface structure of the prepared slice samples was clear and intact,and the oxide layers were not damaged.The microstructure,crystallinity and element distribution of“Al core/oxide layer”under different ageing conditions were obtained were characterized by SEM,HRTEM and EDS.The stoichiometric ratio of Al and O elements in the oxide layer of aluminum particles deviated from the standard Al2O3,showing a gradient distribution.The positive correlation between the oxide layer thickness of aluminum particles and the aging temperature has been quantitatively obtained.The oxide layer thickness of the samples without thermal aging was about 5.4 nm,and the oxide layer thickness of the samples aged at 75℃and 95℃increased to(34.1±2.1)nm and(51.3±2.2)nm,respectively.

关 键 词：聚焦离子束(FIB) 微纳加工技术 高分辨透射电镜 梯度分布 氧化层厚度 微末铝粉 

分 类 号：TJ55[兵器科学与技术—军事化学与烟火技术] Q560.1[生物学—生物化学]