scholarly journals Cover Picture: Cookoff of Black Powder and Smokeless Powder (Prop., Explos., Pyrotech. 3/2021)

2021 ◽  
Vol 46 (3) ◽  
pp. 341-341
Author(s):  
Michael L. Hobbs ◽  
Michael J. Kaneshige
Keyword(s):  
Black Powder ◽  
Smokeless Powder

scholarly journals Cookoff of Black Powder and Smokeless Powder

2021 ◽  
Author(s):  
Michael L. Hobbs ◽  
Michael J. Kaneshige
Keyword(s):  
Black Powder ◽  
Smokeless Powder

Pyrotechnic Residues in Gunshot Residue Analysis

1985 ◽  
Vol 43 ◽  
pp. 128-129
Author(s):  
H. M. Sagara ◽  
S. A. Schliebe ◽  
M. C. Kong
Keyword(s):  
Law Enforcement ◽  
Residue Analysis ◽  
Gunshot Residue ◽  
Particle Analysis ◽  
Dry Skin ◽  
X Ray ◽  
Skin Cells ◽  
Smokeless Powder ◽  
Carbon Coated ◽  
Detailed List

Particle analysis by scanning electron microscopy with energy-dispersive x- ray analysis is one of the current methods used in crime laboratories to aid law enforcement in identifying individuals who have recently fired or handled a firearm. During the discharge of a firearm, the high pressure caused by the detonation of the cartridge materials forces a portion of the generated gases through leaks in the firing mechanism of the weapon. These gases contain residues of smokeless powder, primer mixture, and contributions from the projectile itself. The condensation of these hot gases form discrete, micrometer-sized particles, which can be collected, along with dry skin cells, salts, and other hand debris, from the hands of a shooter by a simple adhesive lift technique. The examination of the carbon-coated adhesive lifts consist of time consuming systematic searches for high contrast particles of spherical morphology with the characteristic elemental composition of antimony, barium and lead. A detailed list of the elemental compositions which match the criteria for gunshot residue are discussed in the Aerospace report.

Combustion of Black Powder. Part III: Hot stage microscopy studies

1991 ◽  
Vol 16 (5) ◽  
pp. 227-231 ◽  
Author(s):  
G. Hussain ◽  
G. J. Rees
Keyword(s):  
Black Powder ◽  
Hot Stage Microscopy ◽  
Powder Part

Electrolytic synthesis of ZrSi/ZrC nanocomposites from ZrSiO4 and carbon black powder in molten salt

2020 ◽  
Vol 111 (7) ◽  
pp. 581-586
Author(s):  
Li Ming ◽  
Wu Xiufeng
Keyword(s):  
Electron Microscopy ◽  
High Temperature ◽  
Carbon Black ◽  
Molten Salt ◽  
Cell Voltage ◽  
Black Powder ◽  
X Ray ◽  
Carbon Black Powder ◽  
Transmission Electron ◽  
A Cell

Abstract ZrSi/ZrC nanocomposites have stable high-temperature properties, where conventional materials cannot meet increasingly demanding high-temperature environments. In this paper, the microstructure and electrochemical reduction mechanism of ZrSi/ZrC nanocomposites have been studied. A mixture of ZrSiO4 and carbon black powder was processed using ball grinding, sheet pressing, and sintering, and cylindrically-sintered sheet was prepared as the cathode for the electrolytic work. A high purity graphite rod was utilized as the anode.The microstructure of the electrolytic product was characterized and analyzed using X-ray diffraction, scanning electron microscopy equipped with energy-dispersive X-ray spectroscopy, and transmission electron microscopy. The experimental results showed that the diameter of the as-synthesized ZrSi/ ZrC fibers typically range between 100-400 nm when produced by the electrolysis of sintered pellets in equimolar CaCl2-NaCl molten salt at 850°C with a cell voltage of 2.8 V for 20 h under an argon atmosphere. The nanofibers were formed in core-shell microstructures that overlap and grow.

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