Journal of Advanced Materials and Technologies

Journal of Advanced Materials and Technologies

Study and Specification of Optimal Liquid Phase Sintering Temperature for Production of Tungsten-Copper Composite

Document Type : Original Reaearch Article

Authors
Mahdi Saghafi 1
Behrouz Ghasemi 1
Iman Babaei Nejad 2
1 University of Semnan, Department of Material and Metallurgy Engineering, Semnan, Iran
2 University of Malek Ashtar, Tehran, Iran
10.30501/jamt.2636.70301
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
Tungsten
Copper
Powder metallurgy
Liquid phase sintering
Composite
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  • Receive Date 31 January 2014
  • Revise Date 31 July 2015
  • Accept Date 15 August 2015