影响纳米铝粉活性的壳层因素的TG-DSC研究TG-DSC research of shell's effect on activity of nano-aluminum powder
何丽蓉;肖乐勤;丁海琴;周伟良;
摘要(Abstract):
采用TG-DSC研究不同包覆壳层厚度、不同壳层种类纳米铝粉的热性能,并对影响纳米铝粉活性的壳层因素作了深入分析。结果表明:同一粒径的纳米铝粉,包覆层越厚,氧化前的质量损失比例越大,氧化增加的质量分数越小,10%和30%高聚物包覆的50 nm铝粉在520~800℃增加的质量23.5%和17.4%,而5%和10%高聚物包覆的100 nm铝粉则增加质量42.5%和36.5%;50 nm铝粉在熔点前的能量释放速率最快,达到最大氧化速率时的温度远低于100 nm铝粉,二者为550℃和590℃,但其活性低于100 nm铝粉。纳米铝粉经高聚物包覆后经185℃热解处理能显著降低壳层厚度,并提高纳米铝粉样品的热性能。
关键词(KeyWords): 纳米铝粉;热性能;壳层;热处理
基金项目(Foundation): 总装重点预研基金项目(9140A28020308BQ0207)
作者(Author): 何丽蓉;肖乐勤;丁海琴;周伟良;
Email:
DOI: 10.14024/j.cnki.1004-244x.2013.05.005
参考文献(References):
- [1]Kwok Q S M,Fouchard R C,Turcotte A M,et al.Characteriza tion of aluminum nanopowder compositions[J].Propellants,Explosives,Pyrotechnics,2002,27:229-240.
- [2]Brousseau P,Anderson C J.Nanometric Aluminum in Explo sives[J].Propellants,Explosives,Pyrotechnics,2002,27(5):300-306.
- [3]赵凤起,覃光明,蔡炳源.纳米材料在火炸药中的应用研究现状及发展方向[J].火炸药学报,2001(4):61-65.
- [4]Kuo K K,Risha G A,Evans B J,et al.Potential usage of ener getic nano sized powders for combustion and rocket propulsion[C].Materials Research Society Symposium Proceedings,2004,800:3-14.
- [5]Alexander G,Alexander I,Ulrich F B,et al.Characterization of aluminum powders:Ⅱ.Aluminum nanopowders passivated by non inert coatings[J].Propellants,Explosives,Pyrotechnics,2006,31(5):401-409.
- [6]Pivkina A,Ivanov D,Yu Frolov,et al.Plasma synthesized nanoaluminum powders:structure,thermal properties and combustion behavio[rJ].Journal of Thermal Analysis and Calorimetry,2006,86(3):733-738.
- [7]Guo Liangui,Song Wulin,Xie Changsheng,et al.Characterization and thermal properties of carbon coated aluminumnanopowders prepared by laser induction complex heating inmethane[J].Materials Letters,2007,61:3211-3214.
- [8]Cliff M,Tepper F,Lisetsky V.Ageing characteristics of Alexnanosize aluminum[C].37th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit,Salt Lake City,UT,July 8-11,2001.
- [9]Fedotova T D,Glotov O G,Zarko V E.Application of cerimetric methods for determining the metallic aluminum content inultrafine aluminum powders[J].Propellants,Explosives,Pyrotechnics,2007,32(2):160-164.
- [10]何丽蓉,肖乐勤,菅晓霞,等.纳米铝粉热反应特性的TG-DSC研究[J].固体火箭技术,2011,34(5):628-631.
- [11]何丽蓉,肖乐勤,菅晓霞,等.氧化铝壳层对纳米铝粉的热反应特性影响研究[J].固体火箭技术,2012,35(3):382-386.