Abstract
The injection molding of Ti powder(30μm in average diameter)was carried out with the PBMA(polybutyl-metacrylate)-EVA(etylene-vinyl acetate copolymer)-wax binder system. Ti powder was mixed with the binder at 140°C.The molding composition was 56%Ti powder, 17%PBMA, 21%(EVA+wax) and 6%dibutyl phthalate in volume. The green was debinded during heating from room temperature to 300°C in the air. The debinded specimen was sintered at 1100 and 1300°C under a vacuum of 10-2 Torr. The main results are summarized as follows:
1)This binder system has good mixing, molding and binder removal characteristics.
2)A specimen sintered at 1300°C for 2hr has a relative density of 94.0% and shows strength of 1000MPa.
3)Sintered specimens are all fractured brittle.
