Abstract
In the current study, melt infiltration into crumpled wire (MICW) is proposed proper for rapid and energy-efficient producing of tungsten-copper composites. The process consists of the continuous wire packing, pressing and infiltration steps. For the feasibility investigation, permeable preforms were prepared from different specified amounts of continuous tungsten wire by the crumpling method. Then, W-Cu composite samples with the composition of W-(15, 20, 23 wt%) Cu were fabricated by molten copper infiltration into green porous preforms under a reducing atmosphere of dry hydrogen at 1200 °C for 30 min. Properties of the samples consisting of density, hardness, and electrical conductivity, plus their microstructure, were studied. The proposed process compared to conventional melt infiltration demonstrated almost full densification, high purity, higher electrical conductivity, and lower cycle time and energy consumption. This approach appears to be engaging and promising for future industrial applications.
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