Rheological properties of metal injection molding feedstock

来源期刊：中国有色金属学报(英文版)2002年第1期

论文作者：李松林 李益民 曲选辉 黄伯云

文章页码：105 - 108

Key words：powder injection molding;rheology;feedstock property

Abstract: Viscosity of a polyethylene glycol-polymethyl methacrylate (PEG-PMMA) binder and PEG-PMMA/Fe-2Ni feedstock in powder injection molding was measured and calculated.A logarithmic additivity between viscosity of the binder and that of its constituents was found.Other factors, such as temperature, powder loads,content and type of surface-active agents and those of polymers,in relation to rheological properties of feedstock were discussed as well.The results showed that with increasing viscosity of surface-active agent,polymer melt index or temperature,the feedstock viscosity decreased while higher polymer content and powder loading would lead to additional feedstock viscosity.The relationship mentioned above is expressed and effectively explained why the change rate of feedstock viscosity will slow down with the increase of shear rate.