Abstract
Powder injection molding (PIM) is an alternative route to produce components from metallic powder that have been growing in last 10 years. The process may be divided in five basic steps, that is powder-binder mixing, mixture injection, binder extraction and sinterization. The greatest advantage of the metallic powder processing is that it surmounts difficulties from conventional powder metallurgy regarding feasibility of tridimensional shapes and density homogeneity. Powder selected to PIM process must provide a high powder packing and sinterability, which is necessary to obtain adequate final density levels. In this way, spherical powders not higher than 20 pm are usually used. In the present work, the possibility of using non-spherical powders for PIM was investigated. To provide basis for comparisons, spherical and non-spherical powders were tested. Powder influence was analyzed concerning viscosity behavior.
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