Combustion velocities were experimentally determined for nanocomposite thermite powders composed of aluminum (Al) fuel and molybdenum trioxide (MoO3) oxidizer under well-confined conditions. Pressures were also measured to provide detailed information about the reaction mechanism. Samples of three different fuel particle sizes (44, 80, and 121nm) were analyzed to determine the influence of particle size on combustion velocity. Bulk powder density was varied from approximately 5% to 10% of the theoretical maximum density (TMD). The combustion velocities ranged from approximately 600 to 1000ms. Results indicate that combustion velocities increase with decreasing particle size. Pressure measurements indicate that strong convective mechanisms are integral in flame propagation.

1.
S. H.
Fischer
and
M. C.
Grubelich
,
Proceedings of the 24th International Pyrotechnics Seminar
, Monterey, CA, 27–31 July 1998 (unpublished).
2.
J. J.
Giles
,
Nature (London)
(London)
427
,
580
(
2004
).
3.
L. L.
Wang
,
Z. A.
Munir
, and
Y. M.
Maximov
,
J. Mater. Sci.
28
,
3693
(
1993
).
4.
C. E.
Aumann
,
G. L.
Skofronick
, and
J. A.
Martin
,
J. Vac. Sci. Technol. B
13
,
1178
(
1995
).
5.
R. A.
Rugunanan
and
M. E.
Brown
,
Combust. Sci. Technol.
95
,
61
(
1994
).
6.
M. E.
Brown
,
S. J.
Taylor
, and
M. J.
Tribelhorn
,
Propellants, Explos., Pyrotech.
23
,
320
(
1998
).
7.
A.
Shimizu
and
J.
Saitou
,
Solid State Ionics
38
,
261
(
1990
).
8.
S.
Brunauer
,
Ph. H.
Emmett
, and
E.
Teller
,
J. Am. Chem. Soc.
60
,
309
(
1938
).
9.
J. J.
Granier
and
M. L.
Pantoya
,
Combust. Flame
138
,
373
(
2004
).
10.
C. G.
Granquist
and
R. A.
Buhrman
,
J. Appl. Phys.
47
,
2200
(
1976
).
11.
R. V.
Hogg
and
J.
Ledolter
, in
Applied Statistics for Engineers and Physical Scientists
, 2nd ed. (
Macmillan
, New York,
1992
).
12.
I.
Glassman
, in
Combustion
, 3rd ed. (
Academic
, San Diego, California,
1996
).
13.
B. W.
Asay
,
S. F.
Son
,
J. R.
Busse
, and
D. M.
Oschwald
,
Propellants, Explos., Pyrotech.
29
,
216
(
2004
).
14.
M. L.
Pantoya
,
S. F.
Son
,
W.
Danen
,
B.
Jorgensen
,
B. W.
Asay
,
J.
Busse
, and
J.
Mang
,
Defense Applications of Nanomaterials
,
ACS Symposium Series
891
, edited by
A. W.
Miziolek
,
S. P.
Karna
,
J. M.
Mauro
, and
R. A.
Vaia
(
American Chemical Society
, Washington, DC,
2005
), pp.
227
240
.
15.
S. F.
Son
, Burn rate measurements of HMX, TATB, DHT, DAAF, and BTATz (Los Alamos National Laboratory);
H. L.
Berghout
,
C. A.
Bolme
,
D. E.
Chavez
,
D.
Naud
, and
M. A.
Hiskey
,
Proc. Combust. Inst.
28
,
919
(
2000
).
You do not currently have access to this content.