Effect of micro and nano Al2O3 on Rheological Properties of Mg-Al2O3 Feedstock for the Powder Injection Molding |
Paper ID : 1326-UFGNSM-FULL |
Authors: |
Abstract: |
In MIM process, the feedstock rheological properties are the key features which influence the steady flow and the uniform filling into the mold. In this study, an attempt is made to specify Mg-Al2O3 feed stocks for use in powder injection molding (PIM). A binder system containing Paraffin wax (PW), Bees wax (BW), and Stearic acid (SA) was selected and flow characteristics of the compound of aforementioned binder and pure Mg and Al2O3 powder in different concentration of nano and micro-Al2O3, shear rate and temperature was investigated via rheological studies using Physica MCR 301 rotary rheometer. The results indicate that the particulate size and concentration of Al2O3 both have great influence on the viscosity of the resulting feedstock. By increasing shear rate and temperature, the viscosity decreases and the instability of feedstock improves. An attempt is also made to correlate the effect of different particulate sizes of Al2O3 on the rheological properties of Mg-Al2O3 feed stocks. |
Keywords: |
Powder Injection molding, Mg-Al2O3 composite, rheological properties |
Status : Paper Accepted (Poster Presentation) |