TY - JOUR
T1 - Thermal property measurements of reactive materials
T2 - The macroscopic behavior of a nanocomposite
AU - Gordon, Amanda
AU - Kappagantula, Keerti
AU - Pantoya, Michelle L.
PY - 2012
Y1 - 2012
N2 - This study experimentally examined the thermal properties of reactive materials that are a composite of fuel and oxidizer particles. Three reactive materials were selected: aluminum (Al) with iron (III) oxide (Fe 2O 3); Al with Teflon (C 2F 4); and Al with titanium (IV) oxide (TiO 2). The experimental measurements were performed using a laser flash analyzer (LFA) and then compared with calculations based on weighted averages of each component in the composite. The effects of fuel particle size, oxidizer, and initial temperature on thermal properties were studied. Nanometric Al composites are more insulative than their micron-scale counterparts, exhibiting three times lower thermal conductivity in some cases. Increased overall contact resistance may be a key contributor to the reduction in thermal conductivity. The measured values deviated as high as 69 from weighted average estimates of thermal properties. These results suggest that factors not accounted for in weighted average estimates significantly influence the thermal properties of the matrix.
AB - This study experimentally examined the thermal properties of reactive materials that are a composite of fuel and oxidizer particles. Three reactive materials were selected: aluminum (Al) with iron (III) oxide (Fe 2O 3); Al with Teflon (C 2F 4); and Al with titanium (IV) oxide (TiO 2). The experimental measurements were performed using a laser flash analyzer (LFA) and then compared with calculations based on weighted averages of each component in the composite. The effects of fuel particle size, oxidizer, and initial temperature on thermal properties were studied. Nanometric Al composites are more insulative than their micron-scale counterparts, exhibiting three times lower thermal conductivity in some cases. Increased overall contact resistance may be a key contributor to the reduction in thermal conductivity. The measured values deviated as high as 69 from weighted average estimates of thermal properties. These results suggest that factors not accounted for in weighted average estimates significantly influence the thermal properties of the matrix.
KW - aluminum
KW - laser flash analyzer
KW - nanocomposites
KW - nanoparticles
KW - reactive materials
KW - thermal properties
UR - http://www.scopus.com/inward/record.url?scp=84866979253&partnerID=8YFLogxK
U2 - 10.1115/1.4006749
DO - 10.1115/1.4006749
M3 - Article
AN - SCOPUS:84866979253
VL - 134
JO - Journal of Heat Transfer
JF - Journal of Heat Transfer
SN - 0022-1481
IS - 11
M1 - 114503
ER -