Influence Of Transition Metals On Performance Of Mo-30%Cu Composite Material

In this paper, activating sintering Mo-30%Cu system compacts by adding the metal element-Fe,Co,Ni was adopted. On the basis of experimental results, mechanism of activated sintering was introduced.The effect of Sintering temperature,Additives choice and Content on the microstructure,hardness and densification was introduced by adding a single species of metal elements.It was found that the densification of Ni-added Mo-30%Cu composite material is superior to many of Fe-added or Co-added Mo-30%Cu composite material Under the same conditions. Furthermore, the densification of Mo-30%Cu composite material increased with the increasing of Ni content at 1300℃.Sintering mechanism of Ni-added Mo-30%Cu composite material is unlike to that of Fe-added and Co-added Mo-30%Cu composite material: Sintering mechanism of Ni-added Mo-30%Cu composite material is Surface diffusion-Excess space Model, Sintering mechanism of Fe-added and Co-added Mo-30%Cu composite material is grain boundary segregation level - excess space model.The effect of Sintering temperature,Additives choice and Content on the microstructure,hardness and densification was studied by adding two different metal elements.It was proved that the hardness and densification of Mo-30%Cu-5%Fe-5%Ni are superior to that of Mo-30%Cu-10%Ni and Mo-30%Cu-5%Fe-5%Ni. In addition,the hardness and densification of Mo-30%Cu system compacts increased with the increasing of holding time and pressing pressure.The hardness of Mo-30%Cu-5%Ni-5%Co-5%Fe system compacts increased then decreased with the increasing of temperature, densification of Mo-30%Cu-5%Ni-5%Co-5%Fe system compacts decreased then increased with the increasing of temperature. The hardness and densification of Mo-30%Cu-5%Fe-5%Ni are superior to that of Mo-30%Cu-5%Fe-5%Ni-5% Co under the same conditions,this shows that the addition of Co did not play a positive role in increasing of hardness and density; the hardness and densification of Mo-30%Cu-5%Fe-5%Ni -5%Co are superior to that of Mo-30%Cu-5%Ni-5%Co,this shows that the addition of Fe play a positive role in increasing of hardness and density; the hardness and densification of Mo-30%Cu-5%Fe-5%Ni-5%Co are superior to that of Mo-30%Cu-5%Fe-5%Co,this shows that the addition of Ni play a positive role in increasing of hardness and density.