TY - JOUR
T1 - Replacing the Al2O3 Shell on Al Particles with an Oxidizing Salt, Aluminum Iodate Hexahydrate. Part I
T2 - Reactivity
AU - Smith, Dylan K.
AU - Unruh, Daniel K.
AU - Wu, Chi Chin
AU - Pantoya, Michelle L.
N1 - Funding Information:
The authors are grateful for support from the Army Research Office under award W911NF-14-1-0250 and encouragement from our program manager, Dr. Ralph Anthenien. We are also grateful to Dr. Jennifer Gottfried from ARL for constructive feedback on this work.
Publisher Copyright:
© 2017 American Chemical Society.
PY - 2017/10/19
Y1 - 2017/10/19
N2 - Improvements in the reactivity, measured in terms of flame speed, for aluminum-based energetic mixtures are increased by a factor of 2-3 by replacing the Al2O3 passivation layer of aluminum (Al) nanoparticles with aluminum iodate hexahydrate (AIH), an oxidizing salt. The Al-AIH nanoparticles are examined under transmission electron microscopy. An AIH passivation shell surrounding the Al core particle is a more reactive composite structure than Al2O3 passivation around Al which facilitates increased reaction rates with flame speeds as high as 3200 m/s. Flame speed measurements are used to show that reaction rates in AIH mixtures are determined by the AIH/Al2O3 ratio, oxygen balance, and β-HIO3. Further optimization of these properties will ultimately boost significant increases in the reaction rates of the energetic materials presented in this article.
AB - Improvements in the reactivity, measured in terms of flame speed, for aluminum-based energetic mixtures are increased by a factor of 2-3 by replacing the Al2O3 passivation layer of aluminum (Al) nanoparticles with aluminum iodate hexahydrate (AIH), an oxidizing salt. The Al-AIH nanoparticles are examined under transmission electron microscopy. An AIH passivation shell surrounding the Al core particle is a more reactive composite structure than Al2O3 passivation around Al which facilitates increased reaction rates with flame speeds as high as 3200 m/s. Flame speed measurements are used to show that reaction rates in AIH mixtures are determined by the AIH/Al2O3 ratio, oxygen balance, and β-HIO3. Further optimization of these properties will ultimately boost significant increases in the reaction rates of the energetic materials presented in this article.
UR - http://www.scopus.com/inward/record.url?scp=85031912977&partnerID=8YFLogxK
U2 - 10.1021/acs.jpcc.7b05803
DO - 10.1021/acs.jpcc.7b05803
M3 - Article
AN - SCOPUS:85031912977
VL - 121
SP - 23184
EP - 23191
JO - Journal of Physical Chemistry C
JF - Journal of Physical Chemistry C
SN - 1932-7447
IS - 41
ER -