TY - GEN
T1 - Dependence of the combustion velocity on particle size and pressure for an Al/CuO thermite
AU - Weismiller, M. R.
AU - Malchi, J. Y.
AU - Yetter, Richard A.
AU - Foley, T. J.
PY - 2007/1/1
Y1 - 2007/1/1
N2 - Recently, there has been significant interest in thermite reactions with nanoscale particles due to their high combustion temperatures and fast reaction velocities. However, the mechanism by which the reaction propagates is not well understood. In order to further understand the propagation mechanism for the Al/CuO nanoscale system, experiments were conducted whereby reaction velocities for various mixtures at different pressures were experimentally found. In the first set of experiments, the sizes of the metal and metal oxide particles were varied between the nanometer and micron scale and the combustion velocities were compared. In the second set of experiments, the combustion of the nanothermite was examined at various pressures in an argon atmosphere. The data indicates that the increased flame propagation speed is significantly more sensitive to the CuO rather than the Al particle size. Furthermore, it is shown that there is a slight increase in propagation speed when increasing from 100 to 180 psig, followed by a significant drop-off in propagation speed at higher pressures.
AB - Recently, there has been significant interest in thermite reactions with nanoscale particles due to their high combustion temperatures and fast reaction velocities. However, the mechanism by which the reaction propagates is not well understood. In order to further understand the propagation mechanism for the Al/CuO nanoscale system, experiments were conducted whereby reaction velocities for various mixtures at different pressures were experimentally found. In the first set of experiments, the sizes of the metal and metal oxide particles were varied between the nanometer and micron scale and the combustion velocities were compared. In the second set of experiments, the combustion of the nanothermite was examined at various pressures in an argon atmosphere. The data indicates that the increased flame propagation speed is significantly more sensitive to the CuO rather than the Al particle size. Furthermore, it is shown that there is a slight increase in propagation speed when increasing from 100 to 180 psig, followed by a significant drop-off in propagation speed at higher pressures.
UR - https://www.scopus.com/pages/publications/84946565685
UR - https://www.scopus.com/pages/publications/84946565685#tab=citedBy
M3 - Conference contribution
AN - SCOPUS:84946565685
T3 - Fall Technical Meeting of the Eastern States Section of the Combustion Institute 2007 "Chemical and Physical Processes in Combustion"
SP - 595
EP - 600
BT - Fall Technical Meeting of the Eastern States Section of the Combustion Institute 2007 "Chemical and Physical Processes in Combustion"
PB - Combustion Institute
T2 - Fall Technical Meeting of the Eastern States Section of the Combustion Institute 2007: Chemical and Physical Processes in Combustion
Y2 - 21 October 2007 through 24 October 2007
ER -