Investigation on Compaction Densification Behaviors of Multicomponent Mixed Metal Powders to Manufacture Silver-Based Filler Metal Sheets

摘要

The powder compaction combines sintering process method was used to fabricate silver-based filler metal thin sheet; the densification behaviors of two mixed metal powder (Ag50Cu50 and Ag60Cu30Sn10) were modeled and investigated. The Drucker-Prager Cap model combines with compaction equations was employed to analyze the mixed metal powder compaction behavior. Firstly, various powder compaction experiments were conducted to determine the powder material parameters, and the friction coefficients were determined experimentally by die compaction. Furthermore, the linear Heckel and nonlinear Gerdemann-Jablonski compaction equations were used to analyze the powder compaction mechanisms. It was observed that lubricant affects the powder deformation and rearrangement densification mechanisms during the powder die compaction process. Finally, finite element modeling results were compared with the validation experiments data to validate the determined constitutive model. The result shows that the established models can accurately describe the mixed powders densification behaviors, which could be used in simulation of tool designing and process parameters optimizing.