The activation energy (E) of flow for zirconia-wax suspensions was characterized by using three different types of dispersing agents having different melting points. Experimental results suggest that the energy E shows a dispersant-dependent character over the temperature range of study. Above the melting point (Tm) of the dispersant, the suspensions exhibit a rheological behavior depending strongly upon the property of dispersant employed; however, below the Tm, suspension viscosity demonstrated a temperature dependence similar to that of the melt wax. A change in rheological mechanism due to the change in temperature appears evident, indicating a possible alternative to tailor the rheological property by interfacial adsorption of proprietary dispersant in highly-concentrated suspensions for particularly powder injection molding applications.
|Number of pages||4|
|Journal||Materials Science and Engineering A|
|State||Published - 15 Jan 1999|
- Melting point
- Powder injection molding