REACTION AND TRANSPORT KINETICS OF A WATER-SOLUBLE MIM BINDER SYSTEM

摘要

A water soluble binder system is used as an organic vehicle for metal powder injection molding. The binder solubility and transport kinetics through the porous metal powder assembly are studied for various powder morphologies and for powder loadings from 54-64 vol %. The binder removal rates are measured. Corresponding reaction-rate and diffusion coefficient can be calculated from the measurements using a shrinking-core reaction kinetic model. The binder removal kinetics are described and compared with those of catalytic and thermal binder systems. Binder saturation during water extraction and environmental compatibility of the commercially available binder system polyMIM are discussed.