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Rheology of suspensions with aluminum nano-particles

Author(s): Ulrich Teipel | Ulrich Förter-Barth

Journal: Journal of Aerospace Technology and Management
ISSN 1984-9648

Volume: 1;
Issue: 1;
Start page: 43;
Date: 2009;
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Keywords: Aluminum nano-particles | Rheology | ALEX | HTPB | Viscoelastic properties

Nano-scale aluminum particles are innovative materials increasingly used in energetic formulations. In this contribution, the rheological behavior of suspensions with either paraffin oil or HTPB as the matrix fluid and nano-scale aluminum (ALEX) as the dispersed phase is described and discussed. The paraffin oil/aluminum suspensions exhibit non-Newtonian flow behavior over a wide range of concentrations, whereas the HTPB/aluminum suspensions exhibitNewtonian behavior (i.e. the viscosity is independent of shear stress) up to a concentration of 50 vol.% aluminum. Both systems have unusual viscoelastic properties in that their elastic moduli are independent of the solids concentration.
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