In this study, the effect of various binders’ compositions on the feedstock of pre-alloyed
tungsten heavy alloys (WHAs) powders has been investigated. Four kinds of wax-based binders
were prepared from paraffin wax (PW), high-density polyethylene (HDPE), polypropylene (PP) and
stearic acid (SA), and the characteristic of each feedstock was investigated at various temperatures
and shear rates. It was found that all the feedstocks exhibited pseudoplastic flow behavior.
Feedstock having multi-polymer components showed better rheological properties than those
having mono-polymer because of good wettability between powder and binder, and less sensitivity
to temperature and shear rates. This could be due to the molecular weight and length of molecular
chain of PP and HDPE.