AlMg/KMnO_4高活性铝热剂的点火和燃烧性能(英文)  

Ignition and Combustion of Super-Reactive Thermites of AlMg/KMnO_4

作　　者：陈伟[1] 姜炜[1] 李平云[1] 刘梨[1] 陈斌华[1] 戴骏骏[1] 王龙祥[1] 袁远[1] 李凤生[1] 

机构地区：[1]南京理工大学国家特种超细粉体工程技术研究中心,江苏南京210094

出　　处：《稀有金属材料与工程》2013年第12期2458-2461,共4页Rare Metal Materials and Engineering

基　　金：National Natural Science Foundation of China(50602024,50972060);NUST Research Funding(2010ZDJH06)

摘　　要：采用机械球磨法制备不同比例的Al-Mg合金,然后采用超声分散法制备AlMg/KMnO4铝热剂。通过DSC、点火温度和燃烧性能测试对AlMg/KMnO4铝热剂进行了性能表征。结果表明:随着镁含量的增加AlMg/KMnO4反应温度明显降低,表明其热反应活性优于Al/KMnO4;此外随着Mg含量(质量分数)从10%增加到50%,点火温度和燃烧速度分别从723 K降低至493 K和254 mg/s降至204mg/s,其中Al0.5Mg0.5/KMnO4火焰溅射范围大幅提高。Al1-xMgx （x=0.1, 0.2, 0.3, 0.4, 0.5） alloys （designated here after as AIMg alloys） were prepared by mechanical ball milling. The thermites were prepared by sonication dispersion method. A1Mg/KMnO4 thermites with different A1/Mg ratios were investi- gated by differential scanning calorimetry （DSC）, ignition and combustion measurements. The results show that the reaction tem- peratures of A1Mg/KMnO4 thermites decrease obviously with the increase of Mg contents, indicating that the thermal reactivity of A1Mg/KMnO4 thermites is superior to that of AI/KMnO4. Furthermore, it is found that both the reaction temperatures and the burn- ing velocities of A1Mg/KMnO4 thermites decrease from 723 to 493 K, and from 254 to 204 mg/s, respectively, as the content of Mg increases from 0.1 to 0.5, among which the A10.5Mg0.5/KMnO4 thermite displays the largest flame splash range. It is expected that A1Mg/KMnO4 will be the most promising energetic material in ordnance applications.

关 键 词：铝镁合金 机械球磨 含能材料 铝热剂 高锰酸钾 

分 类 号：TG146.21[一般工业技术—材料科学与工程]