ایمان بابایی نژاد

In this research، elemental powder mixture of pure tungsten and copper powders was prepared after 1 hr of mixing، and pressed under a load of 500 MPa. Samples from the pressed mixture were liquid phase sintered in a furnace under pure hydrogen atmosphere at different temperatures (1150-1200-1300-1400? C) for 2 hrs. Structure، grain size، density، hardness and strength of produced samples after sintering were studied in different temperatures. Results showed that increasing in temperature up to 1300? C results in increasing in density، hardness and strength. However، at 1400? C due to extensive number of voids among tungsten particles، these properties were found to decrease. The microstructure was associated with wide and deep holes.