Abstract
The effects of composition on coefficient of friction, wear rate, electrical resistance, hardness, porosity, and structure of copper base and copper-tin base selflubricating composites containing tungsten disulphide and molybdenum disulphide were studied. X-ray diffraction analysis showed that tungsten disulphide is stable, but molybdenum disulphide is dissociated during the sintering process. Addition of the optimum content of tungsten disulphide, 20 % by weight was very effective in reducing the wear rate and the coefficient of friction in air, and in vacuum up to 600°C. The equivalent content of molybdenum disulphide was not effective.
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