Pressing Process Effect on Tungsten Copper Electrode Properties II

With the increasing pressure, the density of powder with same weight is increasing. This is due to the accumulation of powder loaded in loose, irregular surface friction generated between each other, the particles to each other to form a bridge arch effect. When pressure exerted, arch effect the destruction of the body powder, powder particles will fill the pores with each other, rearrangement occurs, increase the contact area, and displacement occurs inside powder body.

Therefore, in the process of powder formation, the increasing molding pressure makes the blank density increase. For the same particle size of infiltration sample, as the pressure increased, under the same conditions, which skimmed density, skeletal density have also been increased accordingly.

For the impact of tungsten copper alloy electrode volume change, the experimental data shows that the volume shrinkage skimmed blank with high-temperature sintering compacts after pressing pressure increases. When the pressing pressure is 410 MPa, the maximum volume contraction, and thereafter compacting pressure continues to increase, the volume shrinkage rate began to decline.

More information about pressing process effect on tungsten copper electrode properties, click here:

http://news.chinatungsten.com/en/tungsten-information/80252-ti-10309

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