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Acta Armamentarii ›› 2013, Vol. 34 ›› Issue (9): 1161-1166.doi: 10. 3969/ j. issn. 1000-1093. 2013. 09. 017

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Performance Study on Super-reactive AlMg / KMnO4 Thermites

ZHENG Bao-ming1, JIANG Wei2, CHEN Wei2, LI Feng-sheng2   

  1. 1. Ordrance Science and Research Academy of China, Beijing 100089, China; 2. National Special Superfine Powder Engineering Research Center, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China
  • Received:2012-08-27 Revised:2012-08-27 Online:2013-11-11
  • Contact: ZHENG Bao-ming E-mail:280505739@163. com

Abstract:

Different mass fractions of AlMg alloys are prepared by mechanical ball milling. AlMg/ KMnO4 thermites are prepared by sonication dispersion method. These thermites could be an energetic material in the field of reactive materials and explosives. AlMg/ KMnO4 thermites with different Al/ Mg ratios are investigated by differential scanning calorimetry (DSC), ignition and combustion measurements respectively. The results show that the reaction temperatures of AlMg/ KMnO4 decrease obviously with the higher Mg contents, the ignition temperatures decrease from 723 K to 493 K, indicating that the thermal reactivity of AlMg/ KMnO4 thermites is better than that of Al/ KMnO4. The combustion products of AlMg/ KMnO4 thermites contain Al2O3, MgO and Mn, thus Mn is produced by the thermite reaction of AlMg/ KMnO4.AlMg alloys react with the decomposited product of KMnO4.

Key words: ordnance science and technology, metallic material, materials experiment, aerospace material

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