Influence of Particle Size and Temperature on the Burning Rate of Small Caliber Ball Powder

Author(s):  
John J. Ritter ◽  
Catalin‐Florin Petre ◽  
Pascal Beland ◽  
Charles Nicole
Keyword(s):  
1969 ◽  
Vol 5 (4) ◽  
pp. 395-397
Author(s):  
S. S. Novikov ◽  
P. F. Pokhil ◽  
O. P. Rysakova-Romashkan

Author(s):  
С.В. Шибанов ◽  
◽  
Д.А. Ягодников ◽  
В.И. Сарабьев ◽  
Г.А. Данилова ◽  
...  

2012 ◽  
Vol 510-511 ◽  
pp. 500-506 ◽  
Author(s):  
Z. Mehmood ◽  
Mohammad Bilal Khan ◽  
T. Abbas ◽  
Nasir M. Ahmad

Mechanical and ballistics properties are a measure of the performance of AP/Al/HTPB composites. These properties are influenced by the characteristics of inorganic crystalline oxidizer and aluminum particles. This paper reports the effect of the particle size distribution on mechanical and burning properties of 87% solid loaded composites. Composites were fabricated by mixing the ingredients in the planetary mixer followed by curing at an elevated temperature for several days. Multimodal particle size distribution was used in which coarse to fine ratio was varied proportionally. The burning rate was measured using strand burner at various pressures. Mechanical properties of the composites were investigated by using tensile tester. Results revealed that tensile strength and the burning rate increased while elongation at maximum stress decreased with the increase in the quantity of fines oxidizer. Whereas the variation in the particle size of the aluminum do not have any pronounced effect on the burning as well as mechanical properties of the composite.


2020 ◽  
Vol 70 (6) ◽  
pp. 590-595
Author(s):  
Toan Nguyen Trung ◽  
Nhung Nguyen Thi Cam

Metal-Fluorocarbon compositions are the pyrotechnic formulations which have been widely used in infrared decoy flares to protect aerial targets from infrared guide missile seekers. In this work, the effect of Mg-Al alloy powder (i.e. the particle size and the content) on the combustion and the infrared emission characteristics (i.e. the infrared emission distribution and the infrared radiance) of the pyrotechnic composition based on Mg-Al alloy, polytetrafluoroethylene (PTFE) and Viton rubber are described. The results show that the high burning rate (with the values of 4.0 mm.s-1 to 10.0 mm.s-1, depend on the compression density) of this composition is achieved with a high content of Mg-Al alloy or when using fine Mg-Al alloy particles as well as coarse PTFE particles. On the other hand, the infrared emission radiance (in the wavelength range of 2.5 μm to 5.0 μm) of Mg-Al/PTFE/Viton composition reaches maximum values (i.e. 17.7 W.cm-2.Sr-1 and 21.0 W.cm-2.Sr-1 with the size of Mg-Al particles are 20 μm and 120 μm, respectively) at 60 wt% Mg-Al alloy. Finally, the Mg-Al/PTFE/Viton composition has a similar combustion and emission characteristics as the Mg/PTFE/Viton composition.


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