摘要
采用高能球磨法制备了Fe2O3/Al纳米复合粉末,并利用X射线衍射(XRD)、场发射扫描电镜(SEM)以及热分析仪(TGA/DSC)等分析测试手段,系统研究了球磨时间对复合粉末相结构、组织形貌以及热性能的影响。结果表明,随着球磨时间的增加,微米Fe2O3团聚体逐渐进入Al颗粒中,呈均匀弥散分布,且Al晶粒尺寸不断细化。当球磨时间为20 h时,Al粉已均匀分布到微米Fe2O3颗粒表面,球磨引起的晶粒长大与晶粒尺寸减小处于动态平衡,此时铝热反应热焓达到最高。球磨时间大于20 h时,所制备得到的复合粉末热焓反而降低,且易团聚。
The Fe2O3/Al nano-composite powder was prepared by high energy ball milling method.The effects of milling time on microstructure,morphology and thermal properties of the powder were systematically investigated by means of XRD,SEM and TGA/DSC.The results show that with the increase of the milling time,aggregated Fe2O3 microparticles are embedded in Al particles gradually.The microparticles are well dispersed and uniformly distributed,and crystal size of Al powder is decreased continuously.When the milling time is up to 20 h,Al powder can be evenly distributed on the micron Fe2O3 particle surface,and dynamic balance state forms between grain growth and grain size decrease,meanwhile thermal reaction enthalpy is the highest.When the milling time exceeds 20 h,the thermal reaction enthalpy of nano-composite powder reduces,and the powder is easy to aggregate.
出处
《固体火箭技术》
EI
CAS
CSCD
北大核心
2010年第4期445-448,共4页
Journal of Solid Rocket Technology
基金
国家自然科学基金(10876004)
总装预研重点基金(9140a28020309BQ01)资助
关键词
高能球磨
纳米复合材料
Fe2O3粉末
反应焓
high energy ball milling
nanocomposite materials
Fe2O3 powder
enthalpy of reactions
作者简介
周超（1980-），博士，主要从事含能材料的研究。E-mail：volley2006@bit．edu．cn
