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Ignition and Combustion of Super-Reactive Thermites of AlMg/KMnO4
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Ignition and Combustion of Super-Reactive Thermites of AlMg/KMnO4
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National Natural Science Foundation of China (50602024, 50972060); NUST Research Funding (2010ZDJH06)

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    摘要:

    采用機(jī)械球磨法制備不同比例的Al-Mg合金，然后采用超聲分散法制備AlMg/KMnO4鋁熱劑。通過DSC、點(diǎn)火溫度和燃燒性能測(cè)試對(duì)AlMg/KMnO4鋁熱劑進(jìn)行了性能表征。結(jié)果表明：隨著鎂含量的增加AlMg/KMnO4反應(yīng)溫度明顯降低，表明其熱反應(yīng)活性優(yōu)于Al/KMnO4；此外隨著Mg含量（質(zhì)量分?jǐn)?shù)）從10%增加到50%，點(diǎn)火溫度和燃燒速度分別從723 K降低至493 K和254 mg/s降至204 mg/s，其中Al0.5Mg0.5/KMnO4火焰濺射范圍大幅提高

    Abstract:

    Al1-xMgx (x=0.1, 0.2, 0.3, 0.4, 0.5) alloys (designated here after as AlMg alloys) were prepared by mechanical ball milling. The thermites were prepared by sonication dispersion method. AlMg/KMnO4 thermites with different Al/Mg ratios were investigated by differential scanning calorimetry (DSC), ignition and combustion measurements. The results show that the reaction temperatures of AlMg/KMnO4 thermites decrease obviously with the increase of Mg contents, indicating that the thermal reactivity of AlMg/KMnO4 thermites is superior to that of Al/KMnO4. Furthermore, it is found that both the reaction temperatures and the burning velocities of AlMg/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 Al0.5Mg0.5/KMnO4 thermite displays the largest flame splash range. It is expected that AlMg/KMnO4 will be the most promising energetic material in ordnance applications

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陳 偉,姜 煒,李平云,劉 梨,陳斌華,戴駿駿,王龍祥,袁 遠(yuǎn),李鳳生. Ignition and Combustion of Super-Reactive Thermites of AlMg/KMnO4[J].稀有金屬材料與工程,2013,42(12):2458~2461.[Chen Wei, Jiang Wei, Li Pingyun, Liu Li, Chen Binhua, Dai Junjun, Wang Longxiang, Yuan Yuan, Li Fengsheng. Ignition and Combustion of Super-Reactive Thermites of AlMg/KMnO4[J]. Rare Metal Materials and Engineering,2013,42(12):2458~2461.]
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  • 收稿日期:2012-12-17
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