Metal injection molding of tungsten and its alloys

Metal injection molding (MIM) process of tungsten (W) and its alloys is investigated, including W, oxide dispersion strengthened (ODS) W, tungsten-copper (W-Cu) and tungsten heavy alloy (WHA). The ultrafine powder fabrication technology for W, ODS-W and W-Cu composite are presented, which is important for achieving the high sintered density and homogeneous microstructures. W powder developed with high flowability has been applied for MIM WHA. Wax-based binders have been employed for the feedstock fabrication, respectively. Some applications of the above materials are shown in this paper.