HE friction sensitivity oblique impact sensitivity of explosives (the skid test). Quarterly report, July--September 1971

In order to determine the influence of spheroidization process of Ammonium dinitramide’s hazard grade, the hazardous division of Ammonium dinitramide before and after spheroidization is studied by using hazard classification procedure for combustible and explosive substances and articles standard (WJ20405) and hazard classification method and criterion for combusitible and explosive substances and articles standard (WJ20404). The research results show that spheroidization process can significantly improve the temperature stability of Ammonium dinitramide and significantly reduce friction sensitivity and impact sensitivity of Ammonium dinitramide. So spheroidization process can reduce the hazardous of Ammonium dinitramide and improve the safe character of Ammonium dinitramide.

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The Effect of Li-Al Alloy on Combustion Performance of B/PTFE Fuel-Rich Propellant

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.904.222 ◽

2014 ◽

Vol 904 ◽

pp. 222-227

Author(s):

Ting Liu ◽

Xin Chen ◽

Hui Xiang Xu ◽

Yong Qi Wei ◽

Ai Jun Han ◽

...

Keyword(s):

Burning Rate ◽

Combustion Temperature ◽

Impact Sensitivity ◽

Al Alloy ◽

Combustion Heat ◽

Combustion Performance ◽

Friction Sensitivity

In order to increase the ignition performance and combustion performance of B/PTFE fuel-rich propellant,Li-Al alloy is used to increase the sensitivity of B/PTFE fuel-rich propellant.The impact sensitivity、friction sensitivity、 combustion temperature、 burning rate combustion heat and TGA are tested.The results showed that the sensitivity、combustion heat and ignition performance increase much.The burning rate increased 30~50% and the combustion temperature was relatively stable about 800°C.

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Experimental Study of PTFE Powder Size Impact to Mg/PTFE Pyrotechnic Composition

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.463-464.281 ◽

2012 ◽

Vol 463-464 ◽

pp. 281-285

Author(s):

Xin Chen ◽

Jun Zhao ◽

Gong Pei Pan ◽

Hui Ping Lv

Keyword(s):

Combustion Velocity ◽

Safety Performance ◽

Impact Sensitivity ◽

Powder Size ◽

Particle Sizes ◽

Temperature Peak ◽

Ignition Probability ◽

Ptfe Particle ◽

Pyrotechnic Composition ◽

Friction Sensitivity

To discover the polytetrafluoroethylene (PTFE) powder size impact to Mg/PTFE pyrotechnic composition, hot compatibility of various particle sizes of PTFE powder with spherical superfine Mg powder was studied. Safety performance of Mg/PTFE pyrotechnic composition was also researched by parameters of friction and impact sensitivity. Burning temperature and velocity were recorded and analysed. The result shows that the Mg/PTFE exothermic temperature peak floats =0.8~2.2°C, apparent activation energy alter ratio (AAEAR) =12.5%~17.8%, ignition probability due to friction sensitivity =0.32~0.48 and to impact sensitivity =0. It indicates that PTFE powder size will not inflect the safety of Mg/PTFE composition, which burns more stable with PTFE size great than 400μm. Once mass combustion velocity 2.09~3.87 g•cm-2•s-1 and linearcombustion velocity 5.02~8.13 mm•s-1, the combustion velocity will increase much by following with PTFE particle sizes decrease.

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Effect of Nano-Sized Energetic Materials (nEMs) on the Performance of Solid Propellants: A Review

Nanomaterials ◽

10.3390/nano12010133 ◽

2021 ◽

Vol 12 (1) ◽

pp. 133

Author(s):

Weiqiang Pang ◽

Chongqing Deng ◽

Huan Li ◽

Luigi T. DeLuca ◽

Dihua Ouyang ◽

...

Keyword(s):

Energetic Materials ◽

Research Topic ◽

Impact Sensitivity ◽

Solid Propellants ◽

Rocket Nozzle ◽

Nano Scale ◽

Different Types ◽

Solid Rocket ◽

Friction Sensitivity ◽

The Impact

As a hot research topic, nano-scale energetic materials have recently attracted much attention in the fields of propellants and explosives. The preparation of different types of nano-sized energetic materials were carried out, and the effects of nano-sized energetic materials (nEMs) on the properties of solid propellants and explosives were investigated and compared with those of micro-sized ones, placing emphasis on the investigation of the hazardous properties, which could be useable for solid rocket nozzle motor applications. It was found that the nano-sized energetic materials can decrease the impact sensitivity and friction sensitivity of solid propellants and explosives compared with the corresponding micro-sized ones, and the mechanical sensitivities are lower than that of micro-sized particles formulation. Seventy-nine references were enclosed.

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Impact Sensitivity of RDX and Viton Compositions Prepared by Co-precipitation Method

Defence Science Journal ◽

10.14429/dsj.65.8647 ◽

2015 ◽

Vol 65 (4) ◽

pp. 287 ◽

Cited By ~ 3

Author(s):

P. B. Wagh ◽

S. V. Ingale ◽

Ratanesh Kumar ◽

R.H. Naina ◽

T. C. Kaushik ◽

...

Keyword(s):

Linear Trend ◽

Impact Sensitivity ◽

Precipitation Method ◽

Wide Range ◽

Homogeneous Composition ◽

Sensitivity Data ◽

Spectroscopy Studies ◽

Co Precipitation ◽

Friction Sensitivity ◽

The Impact

Desensitisation of explosive materials using polymers is an important area in safe utilisation of explosives in various applications. The RDX/viton composition has been developed using co-precipitation method with varying content of viton, ranging from 5 to 35 wt per cent. RDX and viton were dissolved in acetone which is a common solvent for RDX and viton, and then the acetone was extracted from the solution by distillation resulting in homogeneous RDX/viton composition. Infrared spectroscopy studies indicated presence of RDX and viton in the resulting compositions. Thermogravimetric and differential thermal analysis studies made on yielded compositions confirmed that RDX is present in the composition in desired content. The shift in exotherm of RDX/viton composition as compared to RDX showed that polymer-bonded RDX compositions are more stable. The impact sensitivity studies showed that sensitivity of RDX/viton composition decreased with increasing content of viton. The similar trend was observed for friction sensitivity. The co-precipitation method has been found to be advantages to obtain homogeneous composition of RDX and viton (with viton content up to 25 wt per cent) as revealed by linear trend in sensitivity data measurements. It has been demonstrated that the sensitivity of RDX can be tailored within a wide range using viton so as to suit in desired applications.Defence Science Journal, Vol. 65, No. 4, July 2015, pp. 287-291, DOI: http://dx.doi.org/10.14429/dsj.65.8647

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