Abstract/Details

Combustion characteristics of nanoenergetic materials composed of aluminum, nickel oxide and a fluoroelastomer


2011 2011

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Abstract (summary)

This research work focuses on studying the combustion characteristics, specifically the burning rates of nanoenergetic materials composed of nano aluminum and nickel oxide. A fluoroelastomer, FC-2175 (chemically the same as Viton™), was used as the binder. Nano aluminum and nickel oxide were chosen as this system is close to a gasless system, does not require pre-heating and has the potential for studying the effects of doping and magnetic field. Various parameters influence the combustion of these composites. Variation of burning rate with particle-size of the oxidizer, binder content, packing density and pressure were studied. The effect of doping the oxidizer and the presence of magnetic field on the burning rate were also studied. The burning rate was found to increase with decrease in particle-size but for smaller particles, specific surface area seemed to be the dominating factor affecting the burning rate. At larger particle-sizes, the results show that the particle-size is the dominating factor affecting the burning rate. The burning rate was also found to decrease with increase in binder content. Similarly, decreasing the pressure increased the burning rate. With increase in packing density, the results show that for this composite, the burning rate first increases and then decreases. This is likely due to the effect of convective and non-planar burning. To study the effect of doping, the oxidizer was doped with lithium (p-doping) and chromium (n-doping). Experiments depicted that doping may affect the burning rate. However, the variation in burning rate was also influenced by other factors like surface area and particle-size of the oxidizer, which varied in this experiment. The doped and undoped oxidizers had different particle-sizes and surface area and due to this, it is unclear if the trend in burning rate for these composites was due to the effect of doping or particle-size and surface area. As nickel is ferromagnetic, the effect of magnetic field on burning rate was explored. It was found that in the presence of a magnetic field, the burning rate decreased but a stronger magnetic field would be required to achieve a clear picture and arrive at a definite conclusion.

Indexing (details)


Subject
Engineering;
Mechanical engineering
Classification
0537: Engineering
0548: Mechanical engineering
Identifier / keyword
Applied sciences; Combustion; Energetics; Nanothermites
Title
Combustion characteristics of nanoenergetic materials composed of aluminum, nickel oxide and a fluoroelastomer
Author
Seshadri, Priya
Number of pages
103
Publication year
2011
Degree date
2011
School code
0183
Source
MAI 50/06M, Masters Abstracts International
Place of publication
Ann Arbor
Country of publication
United States
ISBN
9781267330512
Advisor
Son, Steven F.
Committee member
Groven, Lori J.; Qiao, Li
University/institution
Purdue University
Department
Mechanical Engineering
University location
United States -- Indiana
Degree
M.S.M.E.
Source type
Dissertations & Theses
Language
English
Document type
Dissertation/Thesis
Dissertation/thesis number
1510265
ProQuest document ID
1015396037
Copyright
Database copyright ProQuest LLC; ProQuest does not claim copyright in the individual underlying works.
Document URL
http://search.proquest.com/docview/1015396037
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