DUAL ADVANTAGES OF ULTRA FINE CRYSTAL-SIZED ENERGETIC/REACTIVE MATERIAL FORMULATIONS

2007 ◽  
Vol 6 (3) ◽  
pp. 335-345 ◽  
Author(s):  
Ronald W. Armstrong
Keyword(s):  
Fine Crystal ◽  
Reactive Material

scholarly journals Research on the Ignition Height and Reaction Flame Temperature of PTFE/Al/Si/CuO with Different Mass Ratios of PTFE/Si

Materials ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 3464
Author(s):  
Xuan Zou ◽  
Jingyuan Zhou ◽  
Xianwen Ran ◽  
Yiting Wu ◽  
Ping Liu ◽  
...  
Keyword(s):  
Energy Release ◽  
High Speed ◽  
Flame Temperature ◽  
Sintering Process ◽  
Release Process ◽  
Reactive Material ◽  
Temperature Changes ◽  
Release Capacity ◽  
Mass Ratios ◽  
The Relationship

Recent studies have shown that the energy release capacity of Polytetrafluoroethylene (PTFE)/Al with Si, and CuO, respectively, is higher than that of PTFE/Al. PTFE/Al/Si/CuO reactive materials with four proportions of PTFE/Si were designed by the molding–sintering process to study the influence of different PTFE/Si mass ratios on energy release. A drop hammer was selected for igniting the specimens, and the high-speed camera and spectrometer systems were used to record the energy release process and the flame spectrum, respectively. The ignition height of the reactive material was obtained by fitting the relationship between the flame duration and the drop height. It was found that the ignition height of PTFE/Al/Si/CuO containing 20% PTFE/Si is 48.27 cm, which is the lowest compared to the ignition height of other Si/PTFE ratios of PTFE/Al/Si/CuO; the flame temperature was calculated from the flame spectrum. It was found that flame temperature changes little for the same reactive material at different drop heights. Compared with the flame temperature of PTFE/Al/Si/CuO with four mass ratios, it was found that the flame temperature of PTFE/Al/Si/CuO with 20% PTFE/Si is the highest, which is 2589 K. The results show that PTFE/Al/Si/CuO containing 20% PTFE/Si is easier to be ignited and has a stronger temperature destruction effect.

Energy Release and Fragmentation of Brittle Aluminum Reactive Material Cases

2021 ◽  
Author(s):  
Jacob C. Kline ◽  
Brian P. Mason ◽  
Joseph P. Hooper
Keyword(s):  
Energy Release ◽  
Reactive Material

Effects of penicillamine on serum immunoglobulins and immune complex-reactive material in primary biliary cirrhosis

1985 ◽  
Vol 88 (2) ◽  
pp. 412-417 ◽  
Author(s):  
Henry C. Bodenheimer ◽  
Colette Charland ◽  
Walter R. Thayer ◽  
Fenton Schaffner ◽  
Parker J. Staples
Keyword(s):  
Primary Biliary Cirrhosis ◽  
Immune Complex ◽  
Biliary Cirrhosis ◽  
Reactive Material ◽  
Serum Immunoglobulins

Green reactive material for phosphorus capture and remediation of aquaculture wastewater

2017 ◽  
Vol 105 ◽  
pp. 21-31 ◽  
Author(s):  
N.A. Oladoja ◽  
R.O.A. Adelagun ◽  
A.L. Ahmad ◽  
I.A. Ololade
Keyword(s):  
Reactive Material ◽  
Aquaculture Wastewater

Investigation on Work Hardening Effect Generated during Dynamic Formation of Al-Based Coating on Magnesium Alloy

2013 ◽  
Vol 483 ◽  
pp. 75-78
Author(s):  
Xiao Ming Wang ◽  
Sheng Zhu ◽  
Xue Qiang Feng ◽  
Yu Xiang Liu
Keyword(s):  
Numerical Simulation ◽  
Magnesium Alloy ◽  
Compression Ratio ◽  
Work Hardening ◽  
High Density ◽  
Strengthening Effect ◽  
Fine Crystal ◽  
Sem And Tem ◽  
Grains Refinement ◽  
Dynamic Formation

Numerical simulation of sequential collision behavior of multi-particles during dynamic formation of Al-based coating on magnesium alloy by supersonic particles deposition demonstrated that continuous tamping effect from subsequent sprayed particles improved significantly compression ratio of former deposited particle and promote effectively deformation and spread out. Analysis to morphology and microstructure of Al-based coating on magnesium alloy by SEM and TEM elicited that subsequent sprayed particles generated two effects including erosion and compaction to former deposited layer of the coating, induced formation of high density dislocation, grains refinement and re-crystallization, which played work-hardening strengthening effect and fine crystal strengthening effect to Al-Si coating.

Growth and Characterization of Uniform Carbon Nanotube Arrays on Active Substrates

2015 ◽  
Vol 1752 ◽  
pp. 3-14
Author(s):  
Qiuhong Zhang ◽  
Betty T. Quinton ◽  
Bang-Hung Tsao ◽  
James Scofield ◽  
Neil Merrett ◽  
...  
Keyword(s):  
Buffer Layer ◽  
Layer Structure ◽  
Substrate Surface ◽  
Composite Layer ◽  
Carbon Composite ◽  
Thermal Interface Material ◽  
Chemical Vapor Deposition Method ◽  
Sem Images ◽  
Reactive Material ◽  
Aspect Ratios

ABSTRACTCarbon nanotubes (CNTs) have unique thermal/electrical/mechanical properties and high aspect ratios. Growth of CNTs directly onto reactive material substrates (such as metals and carbon based foam structures, etc.) to create a micro-carbon composite layer on the surface has many advantages: possible elimination of processing steps and resistive junctions, provision of a thermally conductive transition layer between materials of varying thermal expansion coefficients, etc. Compared to growing CNTs on conventional inert substrates such as SiO2, direct growth of CNTs onto reactive substrates is significantly more challenging. Namely, control of CNT growth, structure, and morphology has proven difficult due to the diffusion of metallic catalysts into the substrate during CNT synthesis conditions. In this study, using a chemical vapor deposition method, uniform CNT layers were successfully grown on copper foil and carbon foam substrates that were pre-coated with an appropriate buffer layer such as Al2O3 or Al. SEM images indicated that growth conditions and, most notably, substrate surface pre-treatment all influence CNT growth and layer structure/morphology. The SEM images and pull-off testing results revealed that relatively strong bonding existed between the CNT layer and substrate material, and that normal interfacial adhesion (0.2‒0.5 MPa) was affected by the buffer layer thickness. Additionally, the thermal properties of the CNT/substrate structure were evaluated using a laser flash technique, which showed that the CNT layer can reduce thermal resistance when used as a thermal interface material between bonded layers.

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