Document Type : Original Reaearch Article
Authors
1 University of Semnan, Department of Material and Metallurgy Engineering, Semnan, Iran
2 University of Malek Ashtar, Tehran, Iran
Abstract
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.
Keywords
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