Blue tungsten oxide powder, also known as WO2.92, is a new type of infrared absorption material. Certainly, blue tungsten oxide may also be added to the sintered tungsten skeleton to increase the density of the skeleton. When the skeleton of blue tungsten oxide is reduced and sintered under a hydrogen atmosphere, the blue tungsten oxide is reduced to fine grain size tungsten powder.
In order to study the effect of adding blue tungsten oxide into sintered tungsten skeleton on copper infiltration, fine particle size tungsten powder was added to tungsten powder for comparison. 5% blue tungsten oxide, 0.4μm of tungsten powder, and 1μm of tungsten powder were respectively added to 2μm of tungsten powder, and the mixture was molded and then subjected to skeleton pre-sintering at 1300°C. The obtained tungsten skeleton was infiltrated at 1300°C for 1h to obtain tungsten-copper composite.
It can be seen from the results that, unlike addition of blue tungsten oxide, addition of fine tungsten powder can increase the sintering density of tungsten skeleton. In alloys after copper infiltration, the density of WO2.92 sintered skeleton after copper infiltration is the highest, and the density of skeleton after adding fine tungsten powder is lower.
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