Tungsten Copper High Energy Ball Milling Method

Tungsten copper consists of refractory tungsten and high conductivity copper, because the melting point of tungsten and copper are different and completely insoluble, so the traditional method of making tungsten copper is difficult, in order to achieve powder alloying, Many kinds of strain, defects and nano-scale microstructure were produced during high energy ball milling, the mixture of tungsten copper powder also experienced a process of repeated deformation, cold welding, grinding in mechanical alloying.

The high energy ball milling method is to find the alloyed powder and to be activated in several times by high energy ball milling, it resulting in severe plastic deformation, cold forming composite powder with lamellar structure, after processing the composite powder, the broken powder showed the atomic surface fresh prone to welding, organizational structure has been refined after the occurrence of new powder continuous welding, cold welding and fragmentation. Finally, the purpose of the realization of alloying by atomic mixing was achieved. At the same time, the grain is refined in the process of mechanical alloying, when the grain size reaches a certain degree, the surface area increases and the temperature decreases so as to obtain high uniform distribution of tungsten copper alloy powder and it is helpful to promote the alloying of powder. 

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