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Effect of mechanical alloying on sintering behavior of tungsten carbide cobalt cemented carbide system

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Document pages: 11 pages

Abstract: In the past few years, people have been committed to improving the properties of tungsten carbide (WCS) by preparing composites. In this study, WC particles were prepared by mechanical alloying, and the effects of mechanical alloying conditions such as mechanical alloying time and mechanical alloy powder ratio on the properties of 94wc-6co were studied. According to the experimental study, increasing the mechanical alloying time will increase the density of tungsten carbide samples and reduce the grain size and internal strength of the prepared materials. With the increase of mechanical alloying time, the concentration of fine particles in tungsten carbide samples increases. It is observed that the particle surface roughness decreases with the increase of mechanical alloying timece area of tungsten carbide samples. Besides, the amount of specific phases such as Co3W3C and Co6W6C increases with increasing mechanical alloying time. As another subject of this study, increasing the concentration of mechanically alloyed tungsten carbides caused an increase in the densities of final tungsten carbide materials. With the concentrations of mechanically alloyed materials, the occurrence of Co6W6C and Co3W3C phases and the increase of crystallization are observed.

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