Reviews in particulate materials vol:3 pages:35-69
Powder injection moulding (PIM) has become more and more accepted as a suitable and cost-effective method for mass production of small complex shaped high performance parts. PIM is located between the classical powder metallurgy and the plastic injection moulding technique. Elemental or prealloyed powders are mixed at elevated temperatures with a balanced combination of organic components like polymers, waxes and oils, called the binder, in order to get a homogenous mass, called feedstock. The desired shape is created by injecting the feedstock with more or less conventional injection moulding machines for plastics into an oversized mould. After the removal of the binder the part is sintered to give it the final dimensions and impart mechanical strength.