microwave sintering technology-WC / Co composites

WC / Co composites:

  Conventional sintered WC / Co must be added a large amount of grain growth inhibitor in order to obtain fine and uniform microstructure, but these grain growth inhibitor is added can reduce the mechanical properties of the final product, while the sample in a microwave sintering hardly any any growth WC grains. without adding a lot of grain growth inhibitors. thereby obtain more excellent mechanical properties.

  In the conventional sintering large number of tungsten (mass fraction of 20%) will be dissolved in the cobalt matrix, while the microwave sintering was not observed in the sample to dissolve a large amount of cobalt tungsten phase. Visible microwave sintering can prevent deposition than tungsten drill matrix. The same time. Due to the capillary forces within the crystal is greater than gravity. Sintered sample size uniform shrinkage in two-dimensional space, while the conventionally sintered samples because the influence of gravity. Shapes cause severe distortion. In addition, compared with conventional sintering sample hardness and corrosion resistance of the sample can be obtained by microwave sintering significantly improved.

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