| Summary: | The characterization of MIM feedstock consisting of 63 vol% of copper powder with a
binder system consisting of palm stearin (PS) and low density polyethylene (LDPE) was
studied. To achieve porous structure, sodium chloride (NaCl) was added as a space
holder. The effect of shear rate (s-1), temperature (oC) and viscosity (Pa.s) on the
rheological behavior of solid and porous copper feedstocks were investigated by
using the Rosand RH2000 Capillary Rheometer at temperatures of 160, 170 and 180oC.
The feedstocks achieved desirable injection molding characteristics such as pseudoplastic
behaviour, stable flow, flow behavior index less than 1 (n<1) and low activation
energy (E). It can be concluded from the analysis that both feedstocks showed a
good pseudo-plastic behavior within acceptable ranges in MIM.
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