Mo-Cu alloy

containing different Co contents were prepared by mechanical alloying method. Density

hardness

electric conductivity

thermal conductivity

thermal expansion coefficient and microstructure of the prepared Mo-Cu alloy were tested and observed to understand effects of Co element on densification and microstructure as well as properties of the alloy. The results show that the inert-phase Co7Mo6 is created between Co and Mo

Cu element

which is beneficial to the decrease of densification temperature

and the relative density of the Mo-Cu alloy reaches 97.7% with sintering at 1250℃. With increasing in Co element

the hardness of the Mo-Cu alloy is increased with the observed decrease of electric conductivity and thermal conductivity

however

the thermal expansion coefficient shows the slight fluctuation

which is near to that of Al2O3 ceramics. In addition

the microstructure of the Mo-Cu alloy exhibits homogeneous fine network structure.