Abstract:In order to solve the shortcomings such as high sintering temperature, long sintering time and severe grain growth in the preparation of W-Cu alloy by traditional sintering technologies, W-Cu alloy was rapidly sintered by spark plasma sintering (SPS) and large current resistance sintering under an electric field which promoted the sintering process. With the help of Archimedes drainage method, metallographic microscope and scanning electron microscope etc., the densification degree and microstructure of W-20wt%Cu alloy prepared by two kinds of electric field rapid sintering methods at different sintering temperature (800℃, 900℃, and 1000℃) were studied.Through the calculation of the electric field density in two sintering methods and the appearance of the copper pool in the microstructure, the results showed that: large current resistance sintering was more likely to have a field emission effect compared with SPS, this was favorable for the microstructure and densification of W-Cu alloy. Samples sintered under large current resistance?possessed higher relative density and more?homogeneous microstructure, in?comparison to?samples from?SPS. In spark plasma sintering, the relative density of sintered samples increased and the uniformity of microstructure improved with the sintering temperature increased from 800℃ to 900℃; while concentration distribution of holes and aggregation of particles could be seen in sample sintered at 1000℃. However, the relative density of sintered samples obtained under large current resistance sintering increased and the uniformity of microstructure improved with the sintering temperature raising.