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Innovative Passivation Technologies for Aluminum Nanoparticles

Award Information
Agency: Department of Defense
Branch: Army
Contract: W15QKN-12-C-0126
Agency Tracking Number: A2-5033
Amount: $514,419.00
Phase: Phase II
Program: SBIR
Solicitation Topic Code: A11-089
Solicitation Number: 2011.2
Timeline
Solicitation Year: 2011
Award Year: 2013
Award Start Date (Proposal Award Date): 2012-09-27
Award End Date (Contract End Date): 2013-09-27
Small Business Information
4401 Dayton-Xenia Road
Dayton, OH -
United States
DUNS: 074689217
HUBZone Owned: No
Woman Owned: Yes
Socially and Economically Disadvantaged: No
Principal Investigator
 Christopher Crouse
 Principal Investigator
 (937) 255-9368
 ccrouse@ues.com
Business Contact
 Rick Weddle
Title: Director, Contracts
Phone: (937) 426-6900
Email: rweddle@ues.com
Research Institution
N/A
Abstract

Aluminum nanopowders (nano-Al) possess surface areas on the order of 20-40 m2/g and have attracted interest throughout the energetics community for propellant and metallization applications. Aluminum has an energy density (-31.05 kJ/g) nearly three times higher than most molecular high explosives and its combustion yields a highly exothermic release of energy (?'Hf (Al2O3) = -1676.8 kJ/mol).Unpassivated nano-Al powders are highly pyrophoric and require stabilization through formation of a nascent oxide layer (2-6 nm), however, this process accounts for significant losses in the amount of reactive Al. To optimize the reactive Al content in nano-Al powders, UES has investigated the use of silicon, deposited through a modified chemical vapor deposition process, as an innovative passivation strategy for stabilizing nano-Al. Silicon has an energy density (-32.42 kJ/g) essentially equivalent to Al and also expresses high reactivity on the nano-scale. Passivation of silicon is achieved through a 34% less dense, 1-2 nm nascent oxide, additionally silicon passivation does not consume any Al, therefore, passivation of nano-Al through deposition of silicon has the potential to eliminate undesirable Sdead weight and replace it with additional reactive fuel.

* Information listed above is at the time of submission. *

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