<p>This
thesis presents work on two major areas of research. The first area of research
involves the use of a dual-nozzle piezoelectric inkjet printing system to print
bilayer aluminum bismuth (III) oxide nanothermite samples. The combinatorial
printing method allows for separate fuel and oxidizer inks to be printed
adjacent to each other at prescribed offset distances. The effect of the
bilayer thickness on the burning rate of the samples is investigated using
high-speed imaging. Analysis of the burning rate data revealed that there is no
statistically significant relationship between these two parameters. This
result was used to determine the dominant processes that control the
propagation rate in nanothermite systems. It was concluded that convective
processes dominate the burning rate rather than diffusive processes. The second
area of research involved synthesizing inks suitable for inkjet printing using
two promising high nitrogen energetic materials called BTATz and DAATO<sub>3.5</sub>.
The performance of the developed inks was characterized using four experiments.
The thermal stability and exothermic behavior of the inks were determined using
DSC and TGA analysis. The results revealed that the inks are more thermally
stable than the base materials. The inks were used to print lines that were subsequently
used to determine burning rates. DAATO<sub>3.5</sub> samples were determined to
have faster burning rates than BTATz. Closed pressure bomb experiments were
conducted to determine the gas producing capability of the high nitrogen inks.
BTATz samples showed better performance in terms of peak static pressures and
pressurization rates. 3D printed microthrusters were developed to test the
thrust performance of the inks. Peak thrust, total impulse, and specific
impulse values are reported and were determined to be suitable for use with Class
1 micro-spacecraft. Finally, a microthruster array prototype was developed to
demonstrate the capability to use additive manufacturing to create high packing
density arrays.</p>
| Identifer | oai:union.ndltd.org:purdue.edu/oai:figshare.com:article/8378936 |
| Date | 15 August 2019 |
| Creators | Adarsh Patra (6897383) |
| Source Sets | Purdue University |
| Detected Language | English |
| Type | Text, Thesis |
| Rights | CC BY 4.0 |
| Relation | https://figshare.com/articles/CHARACTERIZATION_OF_INKJET_PRINTED_HIGH_NITROGEN_ENERGETIC_MATERIALS_AND_BILAYER_NANOTHERMITE/8378936 |
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